Crankshaft Position Sensor, Genuine BMW - E30 325e 325i 325is E34 525i (12141720856)
Genuine BMW CPS for the highest quality and least failures. Replacement for BMW #12141720856
There are very few items that can force an M20 engine to not start and the Crankshaft Position Sensor is one of them. The crank sensor (CPS) tells the ECU what position the cams and pistons are in in order to set timing for engine startup. Without engine position the ECU won't energize the ignition system to start. Sometimes the CPS may be dirty or mounted too far away from the crank pulley (or flywheel on early models) and it simply needs adjustment. Otherwise complete replacement is required.
This crank shaft sensor replaces the outdated / superceded BMW part # 12141720852 (12-14-1-720-852) and is the latest updated version from the manufacturer.
This is a Genuine BMW M20 CPS with a two year warranty. Buying a Genuine part will usually be more expensive than an OEM or aftermarket brand but you are assured that it meets BMW's designs for fitment, performance, and longevity. It will also be the very latest design, incorporating any updates or revisions that an aftermarket brand typically will ignore. We prefer the Genuine BMW CPS because it has the best reliability and performance record, compared to aftermarket brands.
E30 (84-91) > 325e
E30 (84-91) > 325es
E30 (84-91) > 325i
E30 (84-91) > 325is
E30 (84-91) > 325ix
E28 (82-88) > 528e
E34 (89-95) > 525i M20