Buy OEM 1991 Buick Part # 10456555 (10456043). Engine Crankshaft Position Sensor. 2.2 LITER. 2.2-4. 3.1 LITER, engine block. 3.1L; In Block. 3.1T & 3.1M; THM 125/3T40. 3.4L; In Block

Sensor. Crankshaft. Position.
A electronic device used in an internal combustion engine to monitor the Position or rotational speed of the Crankshaft while this information is used by engine management systems to control the fuel injection or the ignition system timing and other engine parameters. Location-Block. CR/SHF POSN. Engine.

Engine Crankshaft Position Sensor

2.2 LITER. 2.2-4. 3.1 LITER, engine block. 3.1L; In Block. 3.1T & 3.1M; THM 125/3T40. 3.4L; In Block. All Models; 2.2L. All Models; 3.1L. All Models; 3.1L, 3.4L; In Block. All Models; 3.1L; In Block. All Models; 3.1L; To Block. All Models; 3.4L. All Models; In Block. Aztek, Rendezvous; 3.4L; In Block. Chevrolet. Chevrolet; 3.1T. Front, 3.4 liter. Ignition timing. Impala, Monte Carlo; 3.4L; Side Of Block. In block. Pontiac; 6 Cyl. S-Series; 2.2L. Side of block. Side of block, 3.1 liter. Side of block, 3.4 liter.
Crankshaft Position Sensor - Repair or Replace
A failed crankshaft position sensor will often cause your 1991 Buick to crank without starting or may cause it to die intermittently. If your check engine light is on as a result, our technicians can diagnose and repair the problem.