What is the role of the Crankshaft Position Sensor and Speed Sensor on the BMW M3?

The Crankshaft Position (CKP) sensor/engine speed sensor provides the Engine Control Module (ECM) unit with engine speed information. The sensor reads the information from a tool hed wheel mounted on or integral with the crankshaft. The S14 engines' speed sensor is mounted next to the cylinder identifying sensor on the bell housing and uses the teeth of the flywheel's ring gear for calculating the engine speed. The M20, M42, M50 and S50 engines up to and including 1995 vehicles (OBD I) have the CKP sensor/speed sensor mounted on the front engine cover and reads a toothed wheel mounted to the crankshaft pulley. On all 1996-98 models (OBD II compliant), the CKP sensor is mounted into the lower left rear portion of the engine block and reads a tool hed wheel mounted to the end of the crankshaft assembly. If the Engine Control Module (ECM) does not receive a signal from the Crankshaft Position (CKP) when the engine is cranked, the engine will not start. Use a BMW service tester, the OBD I blink code or on OBD II vehicles, use a suitable Data Scan Tool (DST) to check for faults or if capable, to read the values of the components. If this diagnostic equipmenl is not available, proceed as follows. The engine speed sensor provides the DME unit with engine speed information. The sensor reads the information from a tooth wheel mounted on the crankshaft hub except on the S14 engine. It can also be called the crankshaft sensor. The S14 engines speed sensor is mounted next to the cylinder identifying sensor and is removed in the same manner as the cylinder identifying sensor. The sensor on the S14 engine connects to a plug mounted in a group of 3 plugs on the engine compartment rear wall, next to the engine harness connector and diagnostic socket. It is the connector on the right side. Turn the ignition switch to the OFF position. Trace the sensor lead back to the connector and disconnect. Check the resistance between terminals 1 and 2. The resistance should be 49G-590 ohms. On front mounted Crankshaft Position (CKP) sensors, detach the CKP sensor connector. Use a digital ohmmeter and measure the resistance between the two outer terminals of the sensor. The measured resistance should be 1.150-1,400 ohms.

Genuine BMW M3 Crankshaft Position Sensor

Engine Crankshaft Position Sensor

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12 Crankshaft Position Sensors found

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BMW M3 Pulse Generator, Crankshaft / Gearbox
Part Number: 13627525015
$119.68 MSRP: $175.17
You Save: $55.49 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pulse generator, crankshaft/gearbox; Crankshaft Position Sensor, Crankshaft Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2008-2013 BMW M3 | Convertible(E93), Coupe(E92), Sedan(E90)
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BMW M3 Crankshaft Position Sensor
Part Number: 13627548994
$119.68 MSRP: $175.17
You Save: $55.49 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Crankshaft Engine Speed Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2006 BMW M3 | Convertible(E46), Coupe(E46)
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BMW M3 Crankshaft Position Sensor
Part Number: 13627582842
$91.29 MSRP: $131.38
You Save: $40.09 (31%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Crankshaft Sensor; Camshaft Position Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2015-2018 BMW M3 | Sedan(F80)
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BMW M3 Engine Crankshaft Position Sensor
Part Number: 12141730773
$180.94 MSRP: $240.00
You Save: $59.06 (25%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pulse Generator
- Replaces: 12-14-1-710-668, 12-14-1-269-286, 12-14-1-708-618
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1988-1991 BMW M3 | Coupe(E30)
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BMW M3 Crankshaft Position Sensor
Part Number: 13627839138
$223.89 MSRP: $296.97
You Save: $73.08 (25%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pulse Generator, Crankshaft
- Replaces: 12-14-1-742-629
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2008-2013 BMW M3 | Convertible(E93), Coupe(E92), Sedan(E90)
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BMW M3 Engine Crankshaft Position Sensor
Part Number: 12141708618
$180.94 MSRP: $240.00
You Save: $59.06 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pulse Generator
- Replaced by: 12141730773
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1988-1991 BMW M3 | Coupe(E30)
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BMW M3 Crankshaft Position Sensor
Part Number: 13628644376
$86.96 MSRP: $125.16
You Save: $38.20 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Crankshaft Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2021-2025 BMW M3 | 6 Cyl 3.0 L GAS
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BMW M3 Crankshaft Position Sensor
Part Number: 12141726065
$188.09 MSRP: $249.48
You Save: $61.39 (25%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pulse Generator
- Replaces: 12-14-1-726-066
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1995-1996 BMW M3 | Coupe(E36)
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BMW M3 Crankshaft Position Sensor
Part Number: 12141726066
$188.09 MSRP: $249.48
You Save: $61.39 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pulse Generator
- Replaced by: 12141726065
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1995-1996 BMW M3 | Coupe(E36)
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BMW M3 Crankshaft Speed Sensor
Part Number: 12142296184
$179.83 MSRP: $238.53
You Save: $58.70 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Crankshaft Engine Speed Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2006 BMW M3 | Convertible(E46), Coupe(E46)
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BMW M3 Crankshaft Position Sensor
Part Number: 12141709616
Product Specifications
- Other Name: Pulse Generator, Crankshaft; Crankshaft Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1997-1999 BMW M3 | Convertible(E36), Coupe(E36), Sedan(E36)
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BMW M3 Engine Crankshaft Position Sensor
Part Number: 12141708619
Product Specifications
- Other Name: Pulse Generator; Igniter
- Replaces: 12-14-1-274-644
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1988-1991 BMW M3 | Coupe(E30)

BMW M3 Crankshaft Position Sensor

The BMW M3 Crankshaft Position Sensor is the engine's timing sentry. It always gives the engine's control unit info on crank angle and speed, so it can fire the spark and inject fuel at just the right time. Positioned near the crank pulley or flywheel on many BMW M3 engines, the Crankshaft Position Sensor produces a stream of pulses the ECU translates into readings of real-time RPM and position, allowing variable valve timing and cold start strategies to work smoothly. Earlier inductive Crankshaft Position Sensor versions applied in classic M3 models generated their own voltage as toothed wheels passed the sensor tip, but later Hall effect and magnetoresistive versions fitted to newer BMW M3 cars use internal electronics to detect magnetic changes even when the crankshaft is resting, which increases hot-start reliability. Some racing versions tried optical Crankshaft Position Sensor designs for razor-sharp edge detection, although dirt build-up limited the practicality of using this method on a daily basis. Regardless of style, a failed Crankshaft Position Sensor can stall the engine, cause rough idle, or block the engine from starting. The precise feedback of which helps modern powertrains of BMWs meet efficiency and emissions goals.

If you are looking for OEM BMW M3 Crankshaft Position Sensor, we highly recommend to shop with us. Not only do we offer budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW M3 Crankshaft Position Sensor that come backed by the manufacturer's warranty.

BMW M3 Crankshaft Position Sensor Parts Questions & Experts Answers

Crankshaft Position Sensor
12141709616
Q:
What is the role of the Crankshaft Position Sensor and Speed Sensor on the BMW M3?
Posted by Kelsey J.
A:
The Crankshaft Position (CKP) sensor/engine speed sensor provides the Engine Control Module (ECM) unit with engine speed information. The sensor reads the information from a tool hed wheel mounted on or integral with the crankshaft. The S14 engines' speed sensor is mounted next to the cylinder identifying sensor on the bell housing and uses the teeth of the flywheel's ring gear for calculating the engine speed. The M20, M42, M50 and S50 engines up to and including 1995 vehicles (OBD I) have the CKP sensor/speed sensor mounted on the front engine cover and reads a toothed wheel mounted to the crankshaft pulley. On all 1996-98 models (OBD II compliant), the CKP sensor is mounted into the lower left rear portion of the engine block and reads a tool hed wheel mounted to the end of the crankshaft assembly. If the Engine Control Module (ECM) does not receive a signal from the Crankshaft Position (CKP) when the engine is cranked, the engine will not start. Use a BMW service tester, the OBD I blink code or on OBD II vehicles, use a suitable Data Scan Tool (DST) to check for faults or if capable, to read the values of the components. If this diagnostic equipmenl is not available, proceed as follows. The engine speed sensor provides the DME unit with engine speed information. The sensor reads the information from a tooth wheel mounted on the crankshaft hub except on the S14 engine. It can also be called the crankshaft sensor. The S14 engines speed sensor is mounted next to the cylinder identifying sensor and is removed in the same manner as the cylinder identifying sensor. The sensor on the S14 engine connects to a plug mounted in a group of 3 plugs on the engine compartment rear wall, next to the engine harness connector and diagnostic socket. It is the connector on the right side. Turn the ignition switch to the OFF position. Trace the sensor lead back to the connector and disconnect. Check the resistance between terminals 1 and 2. The resistance should be 49G-590 ohms. On front mounted Crankshaft Position (CKP) sensors, detach the CKP sensor connector. Use a digital ohmmeter and measure the resistance between the two outer terminals of the sensor. The measured resistance should be 1.150-1,400 ohms.
Answered by BMW Parts Specialist Chaz / Apr 03, 2023

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