What is the purpose of the Knock Sensor (KS) in the BMW Z3?

The Knock Sensor (KS) is a crucial component that provides information to the Engine Control Module (ECM) about detonation in the engine. If knock is detected, the ECM will retard the ignition timing to prevent internal mechanical damage. The KS sensor also allows the ECM to optimize ignition timing based on various factors. If low-grade fuel is used, the ECM will compromise engine power output for safe operation. To optimize performance, it is recommended to use a quality grade of fuel as specified in the owner's manual. Testing for KS malfunctions should be done using a BMW service tester or suitable Data Scan Tool (DST) to check for stored faults. When removing and installing the KS, it is important to torque it to specification and apply a locking agent to the threads. The KS sensors are located on the left side of the engine block. Disconnecting various components and plugs, noting their locations and routing, is necessary for removal and installation. Finally, tighten the KS to the specified torque, reconnect the water pipe and knock sensor plugs, and reinstall the wire duct and upper intake manifold.

Genuine BMW Z3 Knock Sensor

Engine Knock Sensor

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BMW Z3 Knock Sensor
Part Number: 12141435485
$108.48 MSRP: $156.12
You Save: $47.64 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Ping Sensor
- Replaced by: 13627568422
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2002 BMW Z3 | Coupe(E36), Roadster 2.5L(E36), Roadster 3.0L(E36)
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BMW Z3 Knock Sensor
Part Number: 13627568422
$108.48 MSRP: $156.12
You Save: $47.64 (31%)
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:
- 1997-2002 BMW Z3 | 2.8L Engine(E36), Coupe(E36), Roadster 2.5L(E36), Roadster 2.8L(E36), Roadster 3.0L(E36)
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BMW Z3 Knock Sensor
Part Number: 12141247993
$118.74 MSRP: $144.00
You Save: $25.26 (18%)
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:
- 1996-1998 BMW Z3 | 1.9L Engine(E36), Roadster 1.9L(E36), Roadster(E36)
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BMW Z3 Knock Sensor
Part Number: 12141703276
$135.46 MSRP: $164.27
You Save: $28.81 (18%)
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:
- 1997-2000 BMW Z3 | 2.8L Engine(E36), Roadster 2.8L(E36)

BMW Z3 Knock Sensor

The Knock Sensor found in BMW Z3 automobiles is an important one because its main function is to receive the vibrations created by the engine knock and transmit these signals to the PCM for adjustments of the ignition timing. Usually piezoelectric, the sensor changes the mechanical stress to the electrical one to measure pressure spikes related to knock. This thing enables exact control of the ignition timing, providing top levels of performance and no harm to the engine even with the low octane fuel. It is possible to fine-tune timings for the certain cylinders and control boost pressure to achieve the maximum possible performance with the minimum wear at different environments. One of the vital car components is the Knock Sensor; BMW Z3 vehicles can hardly operate with it missing due to its importance in the engine efficiency.

If you are looking for OEM BMW Z3 Knock Sensor, we highly recommend to shop with us. Not only do we offer the most budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW Z3 Knock Sensor that come backed by the manufacturer's warranty.

BMW Z3 Knock Sensor Parts Questions & Experts Answers

Knock Sensor
12-14-1-247-993
Q: What is the purpose of the Knock Sensor (KS) in the BMW Z3?
A: The Knock Sensor (KS) is a crucial component that provides information to the Engine Control Module (ECM) about detonation in the engine. If knock is detected, the ECM will retard the ignition timing to prevent internal mechanical damage. The KS sensor also allows the ECM to optimize ignition timing based on various factors. If low-grade fuel is used, the ECM will compromise engine power output for safe operation. To optimize performance, it is recommended to use a quality grade of fuel as specified in the owner's manual. Testing for KS malfunctions should be done using a BMW service tester or suitable Data Scan Tool (DST) to check for stored faults. When removing and installing the KS, it is important to torque it to specification and apply a locking agent to the threads. The KS sensors are located on the left side of the engine block. Disconnecting various components and plugs, noting their locations and routing, is necessary for removal and installation. Finally, tighten the KS to the specified torque, reconnect the water pipe and knock sensor plugs, and reinstall the wire duct and upper intake manifold.

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