Where is the knock sensor located, and How to remove and reinstall it on Volvo S40?

For the 1.8 and 2.0 litre models the knock sensor is mounted on the cylinder block on the front facing side of the intake manifold. Start with removing the intake manifold then from the knock sensor disconnect the wiring connector. It is very important to record the fitted position of the sensor for correct reinstallation. After undoing the retaining bolt remove the sensor. For the 2.4 litre models, you first have to remove the air cleaner assembly and note the fitted positions of the sensors because they need to be fitted again in their original locations. Undo the bolts and remove the sensors in the front of the vehicle to remove the knock sensors and to remove the wiring plugs as the sensors are removed. During reinstallation, make sure you put the sensor/s back in the original locations with the angle of the wiring harness preserved. It is important to tighten the retaining bolt to the specified torque level as failure to do so may result in poor sensor performance and potentially lead to engine damage.

How to replace the knock sensors on a cylinder block on Volvo V70?

The two knock sensors are located on the front-face of the cylinder block below the inlet manifold. Remove the inlet manifold then disconnect the wiring connector to the corresponding knock sensor (front or rear). Next, remove the retaining bolt and remove the sensor. For engines that do not use turbochargers, place the sensor on the cylinder block and replace it, tightening the holding bolt to the required torque while holding the connector of the sensor to the 4 o'clock position. On turbocharged engines, find the sensor on the cylinder block and refit the sensor, tightening the retaining bolt to the specified torque while holding the connector of the front sensor at the 3 o'clock position and the rear sensor connector at the 5 o'clock position. Finally, attach the inlet manifold again.

Genuine Volvo Knock Sensor

Engine Knock Sensor

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Volvo Knock Sensor Part Number: 31441011
$118.39 MSRP: $152.88
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Product Specifications
- Other Name: Ignition Knock (Detonation) Sensor; Sensor
- Replaces: 31272945
Fits the following Volvo Models:
- S40 | 2004-2010 | 2.4i, i, T5, T5 R-Design | 5 Cyl 2.4 L GAS, 5 Cyl 2.5 L GAS
- S60 | 2011-2023 | Polestar, Recharge R-Design, T5, T5 Dynamic, T5 Inscription, T5 Inscription Platinum, T5 Inscription Premier, T5 Momentum, T5 Platinum, T5 Premier, T5 Premier Plus, T5 R-Design, T5 R-Design Special Edition, T6, T6 Inscription, T6 Momentum, T6 Platinum, T6 Polestar, T6 Premier Plus, T6 R-Design, T6 R-Design Platinum, T8 Inscription, T8 Polestar, T8 R-Design, T8 Recharge Core, T8 Recharge Inscription, T8 Recharge Plus, T8 Recharge Polestar, T8 Recharge R-Design, T8 Recharge R-Design Expression, T8 Recharge Ultimate | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 6 Cyl 3.0 L GAS
- S60 Cross Country | 2017-2018 | T5 | 4 Cyl 2.0 L GAS
- S80 | 2005-2016 | 2.5T, 2.5T AWD, 3.2, T5, T5 Platinum, T6, T6 Premier, V8 | 4 Cyl 2.0 L GAS, 5 Cyl 2.5 L GAS, 6 Cyl 2.9 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.2 L GAS, 8 Cyl 4.4 L GAS
- S90 | 2017-2023 | B6 Inscription, B6 Momentum, B6 Plus, B6 R-Design, B6 Ultimate, T5 Inscription, T5 Momentum, T6 Inscription, T6 Momentum, T6 R-Design, T8 Inscription, T8 Momentum, T8 R-Design, T8 Recharge Inscription, T8 Recharge R-Design, T8 Recharge Ultimate | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- V50 | 2005-2010 | 2.4i, i | 5 Cyl 2.4 L GAS
- V60 | 2015-2022 | Polestar, T5, T5 Dynamic, T5 Inscription, T5 Momentum, T5 Platinum, T5 Premier, T5 Premier Plus, T5 R-Design, T6 Inscription, T6 Momentum, T6 Polestar, T6 R-Design, T6 R-Design Platinum, T8 Polestar, T8 Recharge Polestar | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 6 Cyl 3.0 L GAS
- V60 Cross Country | 2020-2022, 2017-2018 | T5, T5 Platinum | 4 Cyl 2.0 L GAS
- V70 | 2004-2010 | 2.4, 2.5T, 2.5T AWD, 3.2, R, T5 | 5 Cyl 2.3 L GAS, 5 Cyl 2.4 L GAS, 5 Cyl 2.5 L GAS, 6 Cyl 3.2 L GAS
- V90 | 2018-2021 | T5 Inscription, T5 R-Design, T6 Inscription, T6 R-Design | 4 Cyl 2.0 L GAS
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Volvo Knock Sensor Part Number: 31491865
$118.39 MSRP: $152.88
You Save: $34.49 (23%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Knock Sensor Screw
Fits the following Volvo Models:
- S60 | 2022-2023 | B5 Core, B5 Inscription, B5 Momentum, B5 Plus, B5 R-Design, B5 Ultimate | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- S90 | 2022-2023 | B6 Inscription, B6 Momentum, B6 Plus, B6 R-Design, B6 Ultimate | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- V60 | 2023 | T8 Recharge Polestar | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- V60 Cross Country | 2023, 2020-2021 | B5 Plus, B5 Ultimate, T5 | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- V90 Cross Country | 2022-2023 | B6, B6 Plus, B6 Ultimate | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- XC40 | 2023 | B4 Plus, B4 Ultimate, B5 Core, B5 Plus, B5 Ultimate | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- XC60 | 2022-2023 | B5 Core, B5 Inscription, B5 Momentum, B5 Plus, B5 R-Design, B5 Ultimate, B6 Inscription, B6 R-Design, B6 Ultimate | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV)
- XC90 | 2023 | B5 Core, B5 Plus, B6 Core, B6 Plus, B6 Ultimate, T8 Recharge Core, T8 Recharge Plus, T8 Recharge Ultimate | 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
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Volvo Knock Sensor Part Number: 8653171
$118.39 MSRP: $152.88
You Save: $34.49 (23%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Ignition Knock (Detonation) Sensor
Fits the following Volvo Models:
- C30 | 2008-2013 | T5, T5 R-Design | 5 Cyl 2.5 L GAS
- C70 | 2006-2013 | T5 | 5 Cyl 2.5 L GAS
- S40 | 2004-2011 | 2.4i, i, T5, T5 R-Design | 5 Cyl 2.4 L GAS, 5 Cyl 2.5 L GAS
- S60 | 2012-2016 | T5, T5 Inscription Platinum, T5 Inscription Premier, T5 Platinum, T5 Premier, T5 Premier Plus | 5 Cyl 2.5 L GAS
- S60 Cross Country | 2016 | T5 Platinum | 5 Cyl 2.5 L GAS
- V50 | 2005-2011 | T5, T5 R-Design | 5 Cyl 2.5 L GAS
- V60 | 2015-2016 | T5, T5 Platinum, T5 Premier, T5 Premier Plus | 5 Cyl 2.5 L GAS
- V60 Cross Country | 2015-2016 | T5, T5 Platinum | 5 Cyl 2.5 L GAS
- XC60 | 2015-2016 | T5, T5 Platinum, T5 Premier | 5 Cyl 2.5 L GAS
- XC70 | 2016 | T5, T5 Platinum, T5 Premier | 5 Cyl 2.5 L GAS
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Volvo Knock Sensor Part Number: 9432570
$118.39 MSRP: $152.88
You Save: $34.49 (23%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Ignition Knock (Detonation) Sensor; Sensor
Fits the following Volvo Models:
- C70 | 1999-2004 | Base | 5 Cyl 2.3 L GAS, 5 Cyl 2.4 L GAS
- S60 | 2001-2009 | 2.4, 2.4T, 2.5T, 2.5T AWD, AWD, Base, R, T5 | 5 Cyl 2.3 L GAS, 5 Cyl 2.4 L GAS, 5 Cyl 2.5 L GAS
- S70 | 1999-2000 | AWD, Base, GLT, GLT SE, T5 | 5 Cyl 2.3 L GAS, 5 Cyl 2.4 L GAS
- S80 | 1999-2006 | 2.5T, 2.5T AWD, 2.9, T6, T6 Premier | 5 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 2.9 L GAS
- V70 | 1999-2007 | 2.4, 2.4T, 2.5T, 2.5T AWD, AWD, Base, GLT, GLT SE, R, R AWD, T5, X/C, X/C AWD, X/C AWD SE | 5 Cyl 2.3 L GAS, 5 Cyl 2.4 L GAS, 5 Cyl 2.5 L GAS
- XC70 | 2003-2007 | Base, Ocean Race, X/C | 5 Cyl 2.5 L GAS
- XC90 | 2003-2006 | 2.5T, Base, T6 | 5 Cyl 2.5 L GAS, 6 Cyl 2.9 L GAS
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Volvo Knock Sensor Parts and Q&A

Knock Sensor
8653171
Q: Where is the knock sensor located, and How to remove and reinstall it on Volvo S40?
A:
For the 1.8 and 2.0 litre models the knock sensor is mounted on the cylinder block on the front facing side of the intake manifold. Start with removing the intake manifold then from the knock sensor disconnect the wiring connector. It is very important to record the fitted position of the sensor for correct reinstallation. After undoing the retaining bolt remove the sensor. For the 2.4 litre models, you first have to remove the air cleaner assembly and note the fitted positions of the sensors because they need to be fitted again in their original locations. Undo the bolts and remove the sensors in the front of the vehicle to remove the knock sensors and to remove the wiring plugs as the sensors are removed. During reinstallation, make sure you put the sensor/s back in the original locations with the angle of the wiring harness preserved. It is important to tighten the retaining bolt to the specified torque level as failure to do so may result in poor sensor performance and potentially lead to engine damage.
Knock Sensor
31441011
Q: How to replace the knock sensors on a cylinder block on Volvo V70?
A:
The two knock sensors are located on the front-face of the cylinder block below the inlet manifold. Remove the inlet manifold then disconnect the wiring connector to the corresponding knock sensor (front or rear). Next, remove the retaining bolt and remove the sensor. For engines that do not use turbochargers, place the sensor on the cylinder block and replace it, tightening the holding bolt to the required torque while holding the connector of the sensor to the 4 o'clock position. On turbocharged engines, find the sensor on the cylinder block and refit the sensor, tightening the retaining bolt to the specified torque while holding the connector of the front sensor at the 3 o'clock position and the rear sensor connector at the 5 o'clock position. Finally, attach the inlet manifold again.