BMW Camshaft Position Sensor - Genuine BMW 12121725020

Product Information

BMW Switches and Sensors diagram for 750iL, 850Ci, 850CSi, 850i

The engine camshaft position sensor is used to aid the engine ECU in monitoring the position of the engine camshaft. The feedback from this sensor is used for the optimization of the engine ignition timing. This sensor is sometimes referred to as a CMP sensor and is critical for proper engine operation. Failure of the camshaft position sensor can cause several driveability complaints including stumbling, hesitation on acceleration, and power loss, as well as potentially cause hard start on no-start conditions.

• Check engine light (CEL)
• Extended crank or no-start condition
• Poor driveability including stumbling, hesitation on acceleration, and power loss.

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The original parts used by BMW to build your car are available as replacement parts under the “Genuine BMW” brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW’s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.

You may not realize this, but the parts that make up your BMW are not necessarily manufactured by BMW. No cause for concern, as BMW designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for BMW for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine BMW parts box and find an OEM branded part inside, simply with the addition of a BMW logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.