How to replace the Knock Sensor (KS) for Bank 2 on Buick LaCrosse?

Begin the Knock Sensor (KS) for Bank 2 replacement by turning off the ignition followed by vehicle lifter and support. You must remove the wiring harness heat shield from the oil level indicator tube for access before disconnecting the KS electrical connector. Start by uninstalling the KS bolt then extract the KS from its position. Secure the new KS in its position with the KS bolt while tightening the bolt to 23 N.m (17 lb ft) as specified in the Fastener Notice of Service Precautions. Commence by reinstalling the wiring harness heat shield to the oil level indicator tube following KS electrical connector reattachment then lower the vehicle.

OEM Buick LaCrosse Knock Sensor

Engine Knock Sensor

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7 Knock Sensors found

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Buick LaCrosse Knock Sensor Part Number: 12623730
$13.47 MSRP: $25.30
You Save: $11.83 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor); Ignition Knock (Detonation) Sensor
- Replaces: 12570125
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2009 Buick LaCrosse | Super | 8 Cyl 5.3 L GAS
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Buick LaCrosse Knock Sensor Part Number: 12621820
$17.52 MSRP: $32.90
You Save: $15.38 (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:
- 2010-2013 Buick LaCrosse | Base, Convenience, CX, CXL, Leather, Premium | 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV)
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Buick LaCrosse Knock Sensor Part Number: 12618603
$37.07 MSRP: $69.61
You Save: $32.54 (47%)
Ships in 1 Business Day
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor); Ignition Knock (Detonation) Sensor
- Replaces: 12566845
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2008 Buick LaCrosse | CXS | 6 Cyl 3.6 L GAS
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Buick LaCrosse Knock Sensor Part Number: 12623095
$23.43 MSRP: $44.02
You Save: $20.59 (47%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2018-2019 Buick LaCrosse | Base, Essence, Preferred, Premium | 4 Cyl 2.5 L MILD HYBRID EV-GAS (MHEV)
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Buick LaCrosse Knock Sensor Part Number: 12591625
$67.91 MSRP: $137.92
You Save: $70.01 (51%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Replaces: 10456215
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2009 Buick LaCrosse | CX, CXL | 6 Cyl 3.8 L GAS
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Buick LaCrosse Knock Sensor Part Number: 12729597
$19.80 MSRP: $37.18
You Save: $17.38 (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:
- 2010-2019 Buick LaCrosse | Avenir, Base, Convenience, CX, CXL, CXS, Essence, Leather, Preferred, Premium, Sport Touring, Touring | 4 Cyl 2.4 L GAS, 4 Cyl 2.4 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.0 L GAS, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Buick LaCrosse Knock Sensor Part Number: 12574628
$61.35 MSRP: $111.03
You Save: $49.68 (45%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2008 Buick LaCrosse | CXS | 6 Cyl 3.6 L GAS

Buick LaCrosse Knock Sensor

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Buick LaCrosse Knock Sensor is one of the most vital parts that highly contribute towards increasing the reliability and performance of Buick's mid-size sedan. premier known for its unique function of monitoring engine knock the Knock Sensor helps transmitting signals to the powertrain control module so that the necessary corrections in ignition timing can be made. This capability is particularly useful as it applies to Buick LaCrosse models that may use lower octane fuel, as it fine tunes the engine while protecting against possible harm. The piezoelectric design of the Knock Sensor has been made highly developed to transform shocks into electrical signals so that the pressure crests, characteristic of knock, are always sensed. It also helps in improving the efficiency of Buick LaCrosse and plays an important role in increasing the safety by managing the engine parameters. Working with many of the LaCrosse models, the Knock Sensor is a critical component that enables the car owner to boost timing rates in individual cylinders as well as control the boost pressure. It can be attributed to the company's objective of offering innovative car models and mastering engineering standards. Apart from the Buick LaCrosse Knock Sensor, there are now automobiles equipped with smart systems to improve long life under the different driving conditions are prevalent in the current market. In total, Knock Sensor plays an important role in Buick LaCrosse and fine-tunes the car's meticulous and forceful ride, which in turn underlines the sturdiness and potency of this model.

Buick LaCrosse Knock Sensor Parts and Q&A

Knock Sensor
12591625
Q: How to replace the Knock Sensor (KS) for Bank 2 on Buick LaCrosse?
A:
Begin the Knock Sensor (KS) for Bank 2 replacement by turning off the ignition followed by vehicle lifter and support. You must remove the wiring harness heat shield from the oil level indicator tube for access before disconnecting the KS electrical connector. Start by uninstalling the KS bolt then extract the KS from its position. Secure the new KS in its position with the KS bolt while tightening the bolt to 23 N.m (17 lb ft) as specified in the Fastener Notice of Service Precautions. Commence by reinstalling the wiring harness heat shield to the oil level indicator tube following KS electrical connector reattachment then lower the vehicle.