How to replace the Knock Sensor (KS) on Chevrolet HHR?

Start by disconnecting the KS harness electrical connector before removing the KS bolt to extract the KS. Install the KS by placing it in its proper position and fastening it with the KS bolt while tightening it to 25 N.m (18 lb ft) using the Fastener Notice instructions. Complete the installation by reconnecting the KS harness electrical connector.

OEM Chevrolet HHR Knock Sensor

Engine Knock Sensor

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3 Knock Sensors found

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Chevrolet HHR Knock Sensor Part Number: 12621820
$16.65 MSRP: $31.26
You Save: $14.61 (47%)
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor); Ignition Knock (Detonation) Sensor
- Replaced by: 19434675
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2010 Chevrolet HHR | LS, LS Panel, LT, LT Panel, SS, SS Panel | 4 Cyl 2.0 L GAS, 4 Cyl 2.2 L FLEX, 4 Cyl 2.4 L FLEX
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Chevrolet HHR Knock Sensor Part Number: 12729597
$18.81 MSRP: $35.32
You Save: $16.51 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor); Camshaft Sensor
- Replaces: 12692505, 12605738, 12636736
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2011 Chevrolet HHR | LS, LS Panel, LT | 4 Cyl 2.2 L FLEX, 4 Cyl 2.4 L FLEX
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Chevrolet HHR Knock Sensor Part Number: 12567711
$28.40 MSRP: $53.34
You Save: $24.94 (47%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Replaces: 12589373, 24577244, 12615500
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2008 Chevrolet HHR | LS, LS Panel, LT, LT Panel, SS | 4 Cyl 2.0 L GAS, 4 Cyl 2.2 L GAS, 4 Cyl 2.4 L GAS

Chevrolet HHR Knock Sensor

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The Knock Sensor in Chevrolet HHR vehicles is a vital part which monitors the knock of the engine and transfers the signals to the powertrain control module to manage the ignition timing. This is useful in avoiding over detonation in the ignition cycle, improving the performance and reducing on the likelihood of the engine being damaged. Usually piezoelectric, the knock sensor transforms the pressure variations into electrical signals which are then permanently checked for pressure spikes typically scoring as knock. The engine is then run just on the borderline of the 'knock limit' by slight frequency changes in the ignition with high volatile fuels and even with the small octane values of fuel. It also has the option to change even cylinder timings and control the boost pressure for optimality as well as durability in different settings.

Chevrolet HHR Knock Sensor Parts and Q&A

Knock Sensor
12567711
Q: How to replace the Knock Sensor (KS) on Chevrolet HHR?
A:
Start by disconnecting the KS harness electrical connector before removing the KS bolt to extract the KS. Install the KS by placing it in its proper position and fastening it with the KS bolt while tightening it to 25 N.m (18 lb ft) using the Fastener Notice instructions. Complete the installation by reconnecting the KS harness electrical connector.