OVERVIEW
Genuine VW/Audi Knock Sensor Mounting Bolt
N-010-272-5 is the genuine hex-head bolt used to secure the knock sensor at its assigned engine mounting point. The correct fastener holds the sensor against the engine mounting surface so that the sensor can detect the mechanical vibrations used by the engine management system to monitor combustion knock.
This listing supplies one individual bolt. The knock sensor, wiring harness, connector and any other mounting hardware are separate items. Match the full original part number and engine-specific mounting point before ordering.
Technical details
- OEM number: N-010-272-5 / N0102725.
- Fastener design: External hex-head bolt with the original threaded shank shown in the archive photo.
- Confirmed function: Knock sensor attachment in the restricted engine applications below.
- Quantity: One bolt per purchased unit.
- Installation control: Correct sensor, original mounting surface and the engine-specific tightening procedure.
A knock sensor mounting bolt contributes to the mechanical coupling between the sensor and engine. Correct installation depends on the specified fastener and clamping procedure. A bolt with a similar head shape may differ in thread engagement or seating geometry. Verify the exact OEM assignment rather than choosing substitute hardware by appearance.
Common reasons to replace
Replacement may be needed when the original bolt is missing, corroded, bent, damaged at the hex head or stripped along the thread. It may also be required during knock sensor replacement or other engine service when the repair procedure calls for renewed hardware. Replace an incorrect substitute found at the sensor mounting point with the properly assigned fastener.
Inspect the sensor mounting surface and threaded mounting hole before installation. A damaged engine thread, cracked sensor, loose connector or failed wiring harness requires its own repair. A knock sensor fault code alone does not prove that this bolt is the failed component; diagnose the sensor circuit and check the mechanical installation before deciding which parts need replacement.
Fitment
The table lists confirmed engine-specific knock sensor applications. Match the full part number to the original fastening point. Different engines within the same model may use different sensor bolts, and a vehicle can have more than one sensor attachment.
| Vehicle | Model years | Engine | Configuration | Application restrictions |
|---|---|---|---|---|
| Volkswagen Atlas Cross Sport | 2020–2023 | 3.6L naturally aspirated gasoline VR6 | Original 3.6L knock sensor fastening point; No transmission-specific restriction listed for the confirmed sensor bolt | 3.6L engine only; match the original sensor attachment and full OEM number. Not the 2.0L turbocharged engine’s fastener. |
| Audi TT | 2008–2009 | 3.2L naturally aspirated gasoline VR6 | 8J; quattro Coupe; original knock sensor fastening point; No transmission-specific restriction listed for the confirmed sensor bolt | 3.2L quattro configuration only; match the original sensor attachment and full OEM number. Not a general bolt for 2.0L TT or TTS engines. |
| Audi TT | 2008–2009 | 3.2L naturally aspirated gasoline VR6 | 8J; quattro Roadster; original knock sensor fastening point; No transmission-specific restriction listed for the confirmed sensor bolt | 3.2L quattro configuration only; match the original sensor attachment and full OEM number. Not a general bolt for 2.0L TT or TTS engines. |
| Volkswagen Passat | 2013–2014 | 3.6L naturally aspirated gasoline VR6, CDVB | NMS sedan, FWD; 6-speed DSG | Original CDVB knock-sensor attachment specifying N-010-272-5. Excludes 1.8T, 2.5L and TDI sensor fasteners. |
Installation and service guidance
Follow the factory procedure for access to the correct knock sensor. Keep dirt and removed hardware out of open engine passages, and protect adjacent hoses and wiring while working. Clean and inspect the assigned sensor mounting surface as directed by the repair procedure.
Start the bolt carefully in the original threaded hole, position the sensor correctly and tighten to the specification for that engine and sensor. Do not use a universal torque value. The sensor mounting procedure matters to its vibration response, so avoid substituting additional washers, spacers, sealants or other hardware unless the factory procedure requires them.
Reconnect and route any disturbed wiring correctly. After the repair, perform the required diagnostic checks and confirm that the sensor installation and connector are secure. Replacing mounting hardware does not resolve unrelated combustion knock, fuel quality concerns, internal engine damage or a defective sensor circuit.