How to replace the Knock Sensor (KS) 2 on 2004 Chevrolet Impala?

Before replacing the Knock Sensor (KS) 2, first lift and suspend up the vehicle. Drain the cooling system to avoid scalds from the hot engine coolant that may still be in the engine water jacket. Remove the two bolts from the knock sensor heat shield, then the release the electrical connector from the knock sensor and remove the sensor itself. To install, do not apply thread sealant to the sensor as it is factory precoated and extra sealant can degrade detonation detection capabilities. Replace the new knock sensor and torque it down to 19 N.m (14 lb ft). Replace the heat shield and fasten the bolts with the wrench to 60 N.m (44 lb ft) and reconnect the electrical connector. Lastly, drop the vehicle and top up the cooling system.

OEM 2004 Chevrolet Impala Knock Sensor

Engine Knock Sensor

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2004 Chevrolet Impala Knock Sensor Part Number: 12591625
$67.91 MSRP: $137.92
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Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Replaces: 10456215
- Item Weight: 0.50 Pounds
- Item Dimensions: 3.1 x 2.1 x 2.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- Require Quantity: 2
- SKU: 12591625
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2004 Chevrolet Impala Submodels:
- Base, LS, LS Sport, Police, SS | 6 Cyl 3.8 L GAS
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2004 Chevrolet Impala Knock Sensor Part Number: 10456238
Product Specifications
- Other Name: Sensor, Distributor (Also Knock Sensor)
- Item Weight: 0.50 Pounds
- Item Dimensions: 3.1 x 2.0 x 2.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 10456238
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2004 Chevrolet Impala Submodels:
- Base | 6 Cyl 3.4 L GAS

2004 Chevrolet Impala Knock Sensor

With a comprehensive array of OEM 2004 Chevrolet Impala Knock Sensor, from fuel pumps to door handles, our website is a one-stop-shop for your needs. All our genuine 2004 Chevrolet Impala Knock Sensor are backed by the manufacturer's warranty and are offered at competitive prices in the market. Rest assured, you can shop with complete confidence.

2004 Chevrolet Impala Knock Sensor Parts and Q&A

Q: How to replace the Knock Sensor (KS) 2 on 2004 Chevrolet Impala?
A: Before replacing the Knock Sensor (KS) 2, first lift and suspend up the vehicle. Drain the cooling system to avoid scalds from the hot engine coolant that may still be in the engine water jacket. Remove the two bolts from the knock sensor heat shield, then the release the electrical connector from the knock sensor and remove the sensor itself. To install, do not apply thread sealant to the sensor as it is factory precoated and extra sealant can degrade detonation detection capabilities. Replace the new knock sensor and torque it down to 19 N.m (14 lb ft). Replace the heat shield and fasten the bolts with the wrench to 60 N.m (44 lb ft) and reconnect the electrical connector. Lastly, drop the vehicle and top up the cooling system.