How to remove and install knock sensors on BMW Z4?

Two knock sensors are used, bolted to the left-hand side of the cylinder block. One sensor detects knocking in Numbers 1 to 3 cylinders, and the other sensor detects knocking in Numbers 4 to 6 cylinders. Disconnect the cable from the negative terminal of the battery. Remove the intake manifold. Locate the sensor connector bracket which is located beneath the idle speed control valve. Warning: If both knock sensors are to be removed, mark the wiring connectors to ensure correct installation. Incorrect reconnection may result in engine damage. Unclip the connector from the retaining clip, and disconnect the sensor wiring connector(s). Unscrew the retaining bolt and remove the knock sensor, noting the routing of the wiring. The sensor for cylinders 1 to 3 is located beneath the temperature sensors in the cylinder head. The knock sensors are located just below the cylinder head on the engine block. The sensor for cylinders 4 to 6 is located to the rear of the sensor wiring connector bracket. Commence installation by thoroughly cleaning the mating faces of the sensor and the cylinder block. Install the sensor to the cylinder block tightening the securing bolt to the torque. Route the wiring as noted before removal, then reconnect the connector(s) and clip the connector to the bracket ensuring that the connectors are positioned as noted before removal. Install the intake manifold.

Genuine BMW Z4 Knock Sensor

Engine Knock Sensor

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6 Knock Sensors found

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BMW Z4 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 Z4 | sDrive28i(E89)
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BMW Z4 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:
- 2006-2011 BMW Z4 | Coupe 3.0si(E86), Roadster 3.0i(E85), Roadster 3.0si(E85), sDrive30i(E89)
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BMW Z4 Knock Sensor
Part Number: 13627566786
$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
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2009-2016 BMW Z4 | sDrive35i(E89), sDrive35is(E89)
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BMW Z4 Knock Sensor
Part Number: 13627636937
$44.43 MSRP: $62.90
You Save: $18.47 (30%)
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:
- 2019-2025 BMW Z4 | 4 Cyl 2.0 L GAS, 6 Cyl 3.0 L GAS, M40i(G29), sDrive30i(G29)
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BMW Z4 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:
- 2003-2005 BMW Z4 | 2.5i(E85), 3.0i(E85)
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BMW Z4 Knock Sensor
Part Number: 12141435485
$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
- Replaced by: 13627568422
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2003-2005 BMW Z4 | 2.5i(E85), 3.0i(E85)

BMW Z4 Knock Sensor

The BMW Z4 Knock Sensor protects the engine from damage by sensing detonation and allowing the control computer to make timing corrections before damage occurs. Positioned on the block, its piezoelectric core converts vibration caused by abnormal pressure spikes to a voltage signal that the PCM then uses to trim ignition advance in tiny steps until smooth combustion is achieved. At this point, timing is eased forward again for peak output. Early Z4 models applied a single Knock Sensor to monitor all cylinders, but later BMW updates see two Knock Sensor units in newer Z4 versions, which allows the software to pinpoint individual cylinders and react more quickly to the changes, improving performance and reducing emissions. Whether single or dual, each Knock Sensor operates in a closed feedback loop that maintains the motor running right at the knock limit, allowing drivers to run regular fuel without the risk of damaging their pistons or bearings. Because timing is computer controlled on every BMW Z4, a failed Knock Sensor can cause a check engine light, rough running, and reduced power until the faulty signal path is restored on the BMW powertrain.

If you are looking for OEM BMW Z4 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 Z4 Knock Sensor that come backed by the manufacturer's warranty.

BMW Z4 Knock Sensor Parts Questions & Experts Answers

Knock Sensor
13627568422
Q:
How to remove and install knock sensors on BMW Z4?
Posted by Stefan S.
A:
Two knock sensors are used, bolted to the left-hand side of the cylinder block. One sensor detects knocking in Numbers 1 to 3 cylinders, and the other sensor detects knocking in Numbers 4 to 6 cylinders. Disconnect the cable from the negative terminal of the battery. Remove the intake manifold. Locate the sensor connector bracket which is located beneath the idle speed control valve. Warning: If both knock sensors are to be removed, mark the wiring connectors to ensure correct installation. Incorrect reconnection may result in engine damage. Unclip the connector from the retaining clip, and disconnect the sensor wiring connector(s). Unscrew the retaining bolt and remove the knock sensor, noting the routing of the wiring. The sensor for cylinders 1 to 3 is located beneath the temperature sensors in the cylinder head. The knock sensors are located just below the cylinder head on the engine block. The sensor for cylinders 4 to 6 is located to the rear of the sensor wiring connector bracket. Commence installation by thoroughly cleaning the mating faces of the sensor and the cylinder block. Install the sensor to the cylinder block tightening the securing bolt to the torque. Route the wiring as noted before removal, then reconnect the connector(s) and clip the connector to the bracket ensuring that the connectors are positioned as noted before removal. Install the intake manifold.
Answered by BMW Parts Specialist Brad / Jan 10, 2026