BMW Expansion Tank Cap - OEM Rein 17117639022
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2.0 bar expansion tank cap

This is quite possibly one of the most overlooked components of the cooling system on BMW's. The expansion tank cap serves a couple of important functions. Firstly, the cap keeps/retains necessary pressure on the coolant to increase the systems efficiency. Secondly, the cap prevents the coolant from boiling or expanding too much by keeping pressure on the coolant and cooling system. This cap is designed to withstand 2 bar (30PSI) of pressure and eventually wears out over time.

We strongly encourage you to replace this cap anytime a cooling system service is completed.

Note: This cap is designed to release if there is too much system pressure. If the cap has leaked coolant, bleed the system and replace the cap.

Fits These Cars:

1991 BMW 318i Engine Coolant Recovery Tank Cap

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1992 BMW 318i Engine Coolant Recovery Tank Cap

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1993 BMW 318i Engine Coolant Recovery Tank Cap

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1994 BMW 318i Engine Coolant Recovery Tank Cap

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1995 BMW 318i Engine Coolant Recovery Tank Cap

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1996 BMW 318i Engine Coolant Recovery Tank Cap

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1997 BMW 318i Engine Coolant Recovery Tank Cap

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1998 BMW 318i Engine Coolant Recovery Tank Cap

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1991 BMW 318is Engine Coolant Recovery Tank Cap

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1992 BMW 318is Engine Coolant Recovery Tank Cap

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1993 BMW 318is Engine Coolant Recovery Tank Cap

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1994 BMW 318is Engine Coolant Recovery Tank Cap

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1995 BMW 318is Engine Coolant Recovery Tank Cap

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1996 BMW 318is Engine Coolant Recovery Tank Cap

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1997 BMW 318is Engine Coolant Recovery Tank Cap

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1995 BMW 318ti Engine Coolant Recovery Tank Cap

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1996 BMW 318ti Engine Coolant Recovery Tank Cap

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1997 BMW 318ti Engine Coolant Recovery Tank Cap

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1998 BMW 318ti Engine Coolant Recovery Tank Cap

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1999 BMW 318ti Engine Coolant Recovery Tank Cap

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2000 BMW 323Ci Engine Coolant Recovery Tank Cap

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1999 BMW 323i Engine Coolant Recovery Tank Cap

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2000 BMW 323i Engine Coolant Recovery Tank Cap

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1998 BMW 323i Engine Coolant Recovery Tank Cap

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1998 BMW 323is Engine Coolant Recovery Tank Cap

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1999 BMW 323is Engine Coolant Recovery Tank Cap

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2001 BMW 325Ci Engine Coolant Recovery Tank Cap

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2002 BMW 325Ci Engine Coolant Recovery Tank Cap

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2003 BMW 325Ci Engine Coolant Recovery Tank Cap

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2004 BMW 325Ci Engine Coolant Recovery Tank Cap

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2005 BMW 325Ci Engine Coolant Recovery Tank Cap

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2006 BMW 325Ci Engine Coolant Recovery Tank Cap

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1992 BMW 325i Engine Coolant Recovery Tank Cap
Mfr body code: E36
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1993 BMW 325i Engine Coolant Recovery Tank Cap
Mfr body code: E36
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1994 BMW 325i Engine Coolant Recovery Tank Cap

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1995 BMW 325i Engine Coolant Recovery Tank Cap

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2001 BMW 325i Engine Coolant Recovery Tank Cap

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2002 BMW 325i Engine Coolant Recovery Tank Cap

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2003 BMW 325i Engine Coolant Recovery Tank Cap

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2004 BMW 325i Engine Coolant Recovery Tank Cap

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2005 BMW 325i Engine Coolant Recovery Tank Cap

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1992 BMW 325is Engine Coolant Recovery Tank Cap

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1993 BMW 325is Engine Coolant Recovery Tank Cap

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1994 BMW 325is Engine Coolant Recovery Tank Cap

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1995 BMW 325is Engine Coolant Recovery Tank Cap

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2001 BMW 325xi Engine Coolant Recovery Tank Cap

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2002 BMW 325xi Engine Coolant Recovery Tank Cap

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2003 BMW 325xi Engine Coolant Recovery Tank Cap

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2004 BMW 325xi Engine Coolant Recovery Tank Cap

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2005 BMW 325xi Engine Coolant Recovery Tank Cap

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2000 BMW 328Ci Engine Coolant Recovery Tank Cap

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1996 BMW 328i Engine Coolant Recovery Tank Cap

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1997 BMW 328i Engine Coolant Recovery Tank Cap

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1998 BMW 328i Engine Coolant Recovery Tank Cap

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1999 BMW 328i Engine Coolant Recovery Tank Cap

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2000 BMW 328i Engine Coolant Recovery Tank Cap

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1996 BMW 328is Engine Coolant Recovery Tank Cap

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1997 BMW 328is Engine Coolant Recovery Tank Cap

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1998 BMW 328is Engine Coolant Recovery Tank Cap

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1999 BMW 328is Engine Coolant Recovery Tank Cap

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2001 BMW 330Ci Engine Coolant Recovery Tank Cap

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2002 BMW 330Ci Engine Coolant Recovery Tank Cap

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2003 BMW 330Ci Engine Coolant Recovery Tank Cap

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2004 BMW 330Ci Engine Coolant Recovery Tank Cap

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2005 BMW 330Ci Engine Coolant Recovery Tank Cap

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2006 BMW 330Ci Engine Coolant Recovery Tank Cap

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2001 BMW 330i Engine Coolant Recovery Tank Cap

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2002 BMW 330i Engine Coolant Recovery Tank Cap

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2003 BMW 330i Engine Coolant Recovery Tank Cap

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2004 BMW 330i Engine Coolant Recovery Tank Cap

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2005 BMW 330i Engine Coolant Recovery Tank Cap

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2001 BMW 330xi Engine Coolant Recovery Tank Cap

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2002 BMW 330xi Engine Coolant Recovery Tank Cap

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2003 BMW 330xi Engine Coolant Recovery Tank Cap

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2004 BMW 330xi Engine Coolant Recovery Tank Cap

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2005 BMW 330xi Engine Coolant Recovery Tank Cap

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1991 BMW 525i Engine Coolant Recovery Tank Cap

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1992 BMW 525i Engine Coolant Recovery Tank Cap

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1993 BMW 525i Engine Coolant Recovery Tank Cap

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1994 BMW 525i Engine Coolant Recovery Tank Cap

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1995 BMW 525i Engine Coolant Recovery Tank Cap

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2001 BMW 525i Engine Coolant Recovery Tank Cap

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2002 BMW 525i Engine Coolant Recovery Tank Cap

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2003 BMW 525i Engine Coolant Recovery Tank Cap

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1997 BMW 528i Engine Coolant Recovery Tank Cap

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1998 BMW 528i Engine Coolant Recovery Tank Cap

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1999 BMW 528i Engine Coolant Recovery Tank Cap

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2000 BMW 528i Engine Coolant Recovery Tank Cap

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1994 BMW 530i Engine Coolant Recovery Tank Cap

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1995 BMW 530i Engine Coolant Recovery Tank Cap

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2001 BMW 530i Engine Coolant Recovery Tank Cap

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2002 BMW 530i Engine Coolant Recovery Tank Cap

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2003 BMW 530i Engine Coolant Recovery Tank Cap

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1989 BMW 535i Engine Coolant Recovery Tank Cap

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1990 BMW 535i Engine Coolant Recovery Tank Cap

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1991 BMW 535i Engine Coolant Recovery Tank Cap

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1992 BMW 535i Engine Coolant Recovery Tank Cap

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1993 BMW 535i Engine Coolant Recovery Tank Cap

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1994 BMW 540i Engine Coolant Recovery Tank Cap

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1995 BMW 540i Engine Coolant Recovery Tank Cap

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1997 BMW 540i Engine Coolant Recovery Tank Cap

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1998 BMW 540i Engine Coolant Recovery Tank Cap

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1999 BMW 540i Engine Coolant Recovery Tank Cap

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2000 BMW 540i Engine Coolant Recovery Tank Cap

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2001 BMW 540i Engine Coolant Recovery Tank Cap

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2002 BMW 540i Engine Coolant Recovery Tank Cap

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2003 BMW 540i Engine Coolant Recovery Tank Cap

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1988 BMW 735i Engine Coolant Recovery Tank Cap

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1989 BMW 735i Engine Coolant Recovery Tank Cap

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1990 BMW 735i Engine Coolant Recovery Tank Cap

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1991 BMW 735i Engine Coolant Recovery Tank Cap

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1992 BMW 735i Engine Coolant Recovery Tank Cap

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1988 BMW 735iL Engine Coolant Recovery Tank Cap

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1989 BMW 735iL Engine Coolant Recovery Tank Cap

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1990 BMW 735iL Engine Coolant Recovery Tank Cap

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1991 BMW 735iL Engine Coolant Recovery Tank Cap

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1992 BMW 735iL Engine Coolant Recovery Tank Cap

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1993 BMW 740i Engine Coolant Recovery Tank Cap

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1994 BMW 740i Engine Coolant Recovery Tank Cap

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1995 BMW 740i Engine Coolant Recovery Tank Cap

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1997 BMW 740i Engine Coolant Recovery Tank Cap

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1998 BMW 740i Engine Coolant Recovery Tank Cap

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1999 BMW 740i Engine Coolant Recovery Tank Cap

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2000 BMW 740i Engine Coolant Recovery Tank Cap

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2001 BMW 740i Engine Coolant Recovery Tank Cap

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1993 BMW 740iL Engine Coolant Recovery Tank Cap

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1994 BMW 740iL Engine Coolant Recovery Tank Cap

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1995 BMW 740iL Engine Coolant Recovery Tank Cap

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1996 BMW 740iL Engine Coolant Recovery Tank Cap

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1997 BMW 740iL Engine Coolant Recovery Tank Cap

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1998 BMW 740iL Engine Coolant Recovery Tank Cap

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1999 BMW 740iL Engine Coolant Recovery Tank Cap

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2000 BMW 740iL Engine Coolant Recovery Tank Cap

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2001 BMW 740iL Engine Coolant Recovery Tank Cap

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2002 BMW 745i Engine Coolant Recovery Tank Cap

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2003 BMW 745i Engine Coolant Recovery Tank Cap

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2004 BMW 745i Engine Coolant Recovery Tank Cap

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2005 BMW 745i Engine Coolant Recovery Tank Cap

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2002 BMW 745Li Engine Coolant Recovery Tank Cap

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2003 BMW 745Li Engine Coolant Recovery Tank Cap

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2004 BMW 745Li Engine Coolant Recovery Tank Cap

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2005 BMW 745Li Engine Coolant Recovery Tank Cap

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1988 BMW 750iL Engine Coolant Recovery Tank Cap

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1989 BMW 750iL Engine Coolant Recovery Tank Cap

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1990 BMW 750iL Engine Coolant Recovery Tank Cap

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1991 BMW 750iL Engine Coolant Recovery Tank Cap

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1992 BMW 750iL Engine Coolant Recovery Tank Cap

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1993 BMW 750iL Engine Coolant Recovery Tank Cap

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1994 BMW 750iL Engine Coolant Recovery Tank Cap

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1995 BMW 750iL Engine Coolant Recovery Tank Cap

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1996 BMW 750iL Engine Coolant Recovery Tank Cap

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1997 BMW 750iL Engine Coolant Recovery Tank Cap

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1998 BMW 750iL Engine Coolant Recovery Tank Cap

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1999 BMW 750iL Engine Coolant Recovery Tank Cap

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2000 BMW 750iL Engine Coolant Recovery Tank Cap

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2001 BMW 750iL Engine Coolant Recovery Tank Cap

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2003 BMW 760Li Engine Coolant Recovery Tank Cap

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2004 BMW 760Li Engine Coolant Recovery Tank Cap

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2005 BMW 760Li Engine Coolant Recovery Tank Cap

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2006 BMW 760Li Engine Coolant Recovery Tank Cap

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2007 BMW 760Li Engine Coolant Recovery Tank Cap

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2008 BMW 760Li Engine Coolant Recovery Tank Cap

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1995 BMW 840Ci Engine Coolant Recovery Tank Cap

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1996 BMW 840Ci Engine Coolant Recovery Tank Cap

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1997 BMW 840Ci Engine Coolant Recovery Tank Cap

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1994 BMW 840Ci Engine Coolant Recovery Tank Cap

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1993 BMW 850Ci Engine Coolant Recovery Tank Cap

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1994 BMW 850Ci Engine Coolant Recovery Tank Cap

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1995 BMW 850Ci Engine Coolant Recovery Tank Cap

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1996 BMW 850Ci Engine Coolant Recovery Tank Cap

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1997 BMW 850Ci Engine Coolant Recovery Tank Cap

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1995 BMW 850CSi Engine Coolant Recovery Tank Cap

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1991 BMW 850i Engine Coolant Recovery Tank Cap

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1992 BMW 850i Engine Coolant Recovery Tank Cap

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1995 BMW M3 Engine Coolant Recovery Tank Cap

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1996 BMW M3 Engine Coolant Recovery Tank Cap

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1997 BMW M3 Engine Coolant Recovery Tank Cap

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1998 BMW M3 Engine Coolant Recovery Tank Cap

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1999 BMW M3 Engine Coolant Recovery Tank Cap

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2001 BMW M3 Engine Coolant Recovery Tank Cap

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2002 BMW M3 Engine Coolant Recovery Tank Cap

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2003 BMW M3 Engine Coolant Recovery Tank Cap

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2004 BMW M3 Engine Coolant Recovery Tank Cap

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2005 BMW M3 Engine Coolant Recovery Tank Cap

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2006 BMW M3 Engine Coolant Recovery Tank Cap

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1991 BMW M5 Engine Coolant Recovery Tank Cap

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1992 BMW M5 Engine Coolant Recovery Tank Cap

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1993 BMW M5 Engine Coolant Recovery Tank Cap

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2000 BMW M5 Engine Coolant Recovery Tank Cap

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2001 BMW M5 Engine Coolant Recovery Tank Cap

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2002 BMW M5 Engine Coolant Recovery Tank Cap

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2003 BMW M5 Engine Coolant Recovery Tank Cap

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2000 BMW X5 Engine Coolant Recovery Tank Cap
2001 BMW X5 Engine Coolant Recovery Tank Cap
2002 BMW X5 Engine Coolant Recovery Tank Cap
2003 BMW X5 Engine Coolant Recovery Tank Cap
2004 BMW X5 Engine Coolant Recovery Tank Cap
2005 BMW X5 Engine Coolant Recovery Tank Cap
2006 BMW X5 Engine Coolant Recovery Tank Cap
1996 BMW Z3 Engine Coolant Recovery Tank Cap

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1997 BMW Z3 Engine Coolant Recovery Tank Cap

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1998 BMW Z3 Engine Coolant Recovery Tank Cap

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1999 BMW Z3 Engine Coolant Recovery Tank Cap

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2000 BMW Z3 Engine Coolant Recovery Tank Cap

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2000 BMW Z3 Engine Coolant Recovery Tank Cap
Sub model: Coupe
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2000 BMW Z3 Engine Coolant Recovery Tank Cap
Sub model: M Coupe
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2000 BMW Z3 Engine Coolant Recovery Tank Cap
Sub model: M Roadster
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2001 BMW Z3 Engine Coolant Recovery Tank Cap
Sub model: Coupe
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2001 BMW Z3 Engine Coolant Recovery Tank Cap
Sub model: M Coupe
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2001 BMW Z3 Engine Coolant Recovery Tank Cap
Sub model: M Roadster
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2001 BMW Z3 Engine Coolant Recovery Tank Cap
Engine base: 3.0L L6, Sub model: Roadster
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2002 BMW Z3 Engine Coolant Recovery Tank Cap
Sub model: Coupe
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2002 BMW Z3 Engine Coolant Recovery Tank Cap
Sub model: M Coupe
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2002 BMW Z3 Engine Coolant Recovery Tank Cap
Sub model: M Roadster
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2002 BMW Z3 Engine Coolant Recovery Tank Cap
Engine base: 3.0L L6, Sub model: Roadster
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2003 BMW Z4 Engine Coolant Recovery Tank Cap

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2004 BMW Z4 Engine Coolant Recovery Tank Cap

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2005 BMW Z4 Engine Coolant Recovery Tank Cap

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2006 BMW Z4 Engine Coolant Recovery Tank Cap

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2007 BMW Z4 Engine Coolant Recovery Tank Cap

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2008 BMW Z4 Engine Coolant Recovery Tank Cap

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2000 BMW Z8 Engine Coolant Recovery Tank Cap

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2001 BMW Z8 Engine Coolant Recovery Tank Cap

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2002 BMW Z8 Engine Coolant Recovery Tank Cap

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2003 BMW Z8 Engine Coolant Recovery Tank Cap

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2004 BMW X3 Engine Coolant Recovery Tank Cap

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2005 BMW X3 Engine Coolant Recovery Tank Cap

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2006 BMW X3 Engine Coolant Recovery Tank Cap

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2007 BMW X3 Engine Coolant Recovery Tank Cap

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2008 BMW X3 Engine Coolant Recovery Tank Cap

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2009 BMW X3 Engine Coolant Recovery Tank Cap

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2010 BMW X3 Engine Coolant Recovery Tank Cap

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2005 BMW 760i Engine Coolant Recovery Tank Cap

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2006 BMW 760i Engine Coolant Recovery Tank Cap

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2004 BMW 760i Engine Coolant Recovery Tank Cap

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2006 BMW 750Li Engine Coolant Recovery Tank Cap

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2007 BMW 750Li Engine Coolant Recovery Tank Cap

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2008 BMW 750Li Engine Coolant Recovery Tank Cap

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2006 BMW 750i Engine Coolant Recovery Tank Cap

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2007 BMW 750i Engine Coolant Recovery Tank Cap

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2008 BMW 750i Engine Coolant Recovery Tank Cap

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2007 BMW Alpina B7 Engine Coolant Recovery Tank Cap

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2008 BMW Alpina B7 Engine Coolant Recovery Tank Cap

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Product match fitment

BMW Expansion Tank Cap - OEM Rein 17117639022

Brand:
Rein logoRein
SKU #:
CRP-CPE0030P
Part:
Engine Coolant Recovery Tank Cap
OE Numbers:
17111742231, 17110152374, 17111712492, 17111712669, 17117639022
FCP ID:
110966
$11.25 MSRP: $14.99
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Customer Reviews

Write a Review Average rating:
5.0 based on 10 review(s)
By: Dville
Sun, Nov 6 at 8:35PM
Same Is Factory Part

no distinction between this part and a factory part. Perfect fit and finish

By: Paola
Mon, Aug 1 at 6:00PM

Excellent

By: Charles Okonta
Tue, Aug 25 at 10:54AM
Arc

Exact Fit and Replacement. Works perfectly well. Same as OEM, only difference is that it does not carry the BMW Logo. Satisfied and would highly recommend.

By: e36m3s50guy
Sat, Jul 11 at 10:12PM
Perfect

The fit is precise with an OEM expansion tank. I needed to replace an old one that had failed under high pressure after turning off the engine on a hot day after it had stored a lot of latent heat--and this replacement seals nicely even under hot stops.

By: John
Wed, Sep 17 at 6:07PM

Nice fit. Does what it needs to do.

By: Boon
Sat, May 31 at 10:28AM
Good

Good Cap, Exact fit, Good seal.

By: Bruce
Mon, May 5 at 10:51PM

It's a radiator cap, and it fits. Not much else to say!

By: Scott
Sat, Apr 19 at 11:27AM

Works just as well as OE.

By: Dean
Mon, Mar 24 at 1:14PM
Commonly Overlooked

Fit and function are perfect so far. It's seems to be such a simple part many of us forget it can actually fail and if it does, catastrophic cooling system failure can result. Extremely low cost for my piece of mind.

By: jfm
Thu, Feb 16 at 4:32PM

Cap is same as original. Works good so far.

Some of the reviewers above may have been rewarded for their positive & negative reviews. We don't hold anything back.
Keep me posted
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