BMW Angle Connector Wiring Repair Kit - 12527507529KT

This is the correct kit for the N54 fuel injector wires (BMW-13538616079). The other kit (BMW Fuel Injector Connector Kit - 12527507529KT1) with metal pins (BMW-12512247474 and BMW-12512247475) will not fit the plastic terminal socket. If you want to fix the N54 fuel injector wires, this is the correct kit. Used to repair wires on my E90 335 when one of the connectors snapped when removing it. I also recommend getting the wire crimper iCrimp Delphi Weather Pack Crimper IWC-1424B ($18 on Amazon).

I was replacing the valve cover gasket on my car and in reassembling the wiring harness (which is in pretty rough shape) and I snapped this little fuel injector socket housing in half. The interior of this piece is an electrical pin and super gluing the socket back together will not fix it. Luckily, this is a really easy job if you are patient with fiddly things. A set of tweezers is the key tool for this job. There is a little clip on the socket housing you will need to pull up. That will allow your old socket to come off. Mine was broken so it slipped right off, if yours is not you are going to need to open this clip and expose the electrical pins, you can then push on the exposed metal pieces of the electrical pin and work them out of the socket. Make sure you keep track of which wire is on which side, they will pretty much stay in position but keep track however you feel is best. Once your socket is off you need to pull apart the arms of the old electrical pin off the wire. The old pin may be soldered to the wiring harness, you can just cut the wire (there is plenty to spare). At this point you will need to strip down about 1-2 inches of wire to attach the new pin. Feed the wire through the rubber grommet, the wider end of the grommet should be further down the wire. You need to wrap to the two arms around the narrowest part of the grommet and feed the end of the wire into the next little set of arms of the electrical pin. At this point you should bend the second set of flaps around your wire and either solder them together or crimp the wire between the little arms. You will now have two sets of arms from the pin bent closed, one set around the grommet and one set around the wire. CRITICALLY, you need to test that your wire is securely held by the electrical pin, you don't want it coming apart as you slide this into the socket housing or into the fuel injector connection itself. otherwise you will have to disassemble everything and start over. Once you are certain it is secure, pinch your fingers on the wire at the base of the grommet and push this all into the socket housing. The little electrical pins will have indentions and those indentions should be on the same side as the locking flap on the socket housing. As you slide the electrical pins and grommets into the socket housing you will hear two miniscule but very satisfying clicks. You can then close the flap on the socket housing. I would recommend unhooking the fuel injector hookup to give yourself a bit more slack to work with as you reattach this piece. A wiring harness is 500 bucks and this piece is 10 dollars and can be fixed with a pair of tweezers and wire strippers. Very very useful.