How to access and replace the knock sensors on BMW 328i?

Disconnect the negative battery cable. To access the knock sensors, remove the intake manifold. There are two knock sensors on the left side of the block. The front knock sensor is located on the block near the ECT sensor. The rear knock sensor is mounted behind the starter motor. Mark the mounting angle of the sensors. Disconnect the electrical connector to the sensors. Remove the mounting bolt at each sensor. These bolts are aluminum and must be discarded. Installation is the reverse of removal, noting the following points: Clean the block surface before installing the sensors. Use new aluminum bolts. Mount the sensors at the same angle as original. Tighten bolts to 63 in-lbs, then an additional 90-degrees.

Genuine BMW 328i Knock Sensor

Engine Knock Sensor

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BMW 328i Knock Sensor
Part Number: 13627598861
$44.43 MSRP: $62.90
You Save: $18.47 (30%)
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Product Specifications
- Other Name: Ping Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2012-2016 BMW 328i | N20 Engine(F30), N26 Engine(F30), Sedan N20 Engine(F30), Sedan N26 Engine(F30), Wagon(F31)
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BMW 328i Engine Knock Ping Sensor
Part Number: 13627566785
$118.21 MSRP: $173.02
You Save: $54.81 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Ping Sensor; Knock Sensor
- Replaces: 13-62-7-525-039
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2007-2013 BMW 328i | Convertible N51 Engine(E93), Convertible N52 Engine(E93), Coupe N51 Engine(E92), Coupe N52 Engine(E92), Sedan N51 Engine(E90), Sedan N52 Engine(E90), Wagon(E91)
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BMW 328i Knock Sensor
Part Number: 12141703276
$182.74 MSRP: $242.39
You Save: $59.65 (25%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Ping Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1996-1999 BMW 328i | Convertible(E36), Sedan(E36)
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BMW 328i Knock Sensor
Part Number: 13627568422
$118.21 MSRP: $173.02
You Save: $54.81 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Ping Sensor
- Replaces: 12-14-1-435-485
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1999-2000 BMW 328i | Sedan(E46)

BMW 328i Knock Sensor

The 328i's Knock Sensor acts as the engine's safeguard against detonation by relaying information to the control computer to lessen spark advance before components are damaged. The Knock Sensor in each 328i employs a piezoelectric crystal that converts vibration into voltage instantly understood by the powertrain control module. When knocking is detected, the timing is retarded in small steps until quiet returns, then advanced again so BMW engines deliver optimal performance and fuel economy. The early 328i editions utilized a single broadband Knock Sensor, which was placed on the block to monitor all cylinders together. In later BMW models, two narrow band Knock Sensor units were positioned between the cylinder pairs, delivering cylinder-specific data to the control unit and smoother idle quality. The difference is resolution. A single sensor will hear a general noise, while dual sensors will identify the cylinder misfiring much faster. Each reading connects inputs from both the crankshaft and the camshaft, permitting the high voltage coils to fire at the optimal moment. This process curbs emissions and shields components from damage. Because they lose reliability with age, a failed Knock Sensor may turn on the check engine lamp, blunt acceleration, and impose conservative ignition maps on any 328i or BMW until the part is replaced.

If you are looking for OEM BMW 328i Knock 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 328i Knock Sensor that come backed by the manufacturer's warranty.

BMW 328i Knock Sensor Parts Questions & Experts Answers

Knock Sensor
13627598861
Q:
How to access and replace the knock sensors on BMW 328i?
Posted by Vitalii Y.
A:
Disconnect the negative battery cable. To access the knock sensors, remove the intake manifold. There are two knock sensors on the left side of the block. The front knock sensor is located on the block near the ECT sensor. The rear knock sensor is mounted behind the starter motor. Mark the mounting angle of the sensors. Disconnect the electrical connector to the sensors. Remove the mounting bolt at each sensor. These bolts are aluminum and must be discarded. Installation is the reverse of removal, noting the following points: Clean the block surface before installing the sensors. Use new aluminum bolts. Mount the sensors at the same angle as original. Tighten bolts to 63 in-lbs, then an additional 90-degrees.
Answered by BMW Parts Specialist Adrian / Mar 11, 2026