Description
The Genuine Mercedes-Benz A0009057304 Engine Knock Sensor is an original Mercedes-Benz component used within the petrol engine management system.
The sensor detects vibrations associated with engine knock or detonation and sends a signal to the engine control unit. This allows the ECU to adjust ignition timing and help maintain efficient, controlled engine operation. Mercedes-Benz officially identifies A0009057304 as a knock sensor.
The part number is documented across several modern Mercedes-Benz petrol-engine applications, including vehicles equipped with M282, M276 and M256 engine families.
A0009057304 is also listed as 0009057304 without the Mercedes-Benz prefix.
Important: Knock sensors are engine-specific. Always verify the 17-digit VIN, engine code, connector configuration, and existing Genuine part number before ordering.
Compatibles with
Potential applications include selected Mercedes-Benz models equipped with compatible petrol engines, including:
- A-Class W177 – selected M282 applications
- B-Class W247 – selected petrol applications
- CLA C118 / X118 – selected petrol applications
- GLA H247 – selected petrol applications
- GLB X247 – selected petrol applications
- C-Class – selected M276 applications
- E-Class – selected M276 applications
- CLS-Class – selected M256/M276 applications
- GLE-Class – selected M256/M276 applications
- S-Class – selected M256 applications
- Selected Mercedes-AMG applications
For example, A0009057304 is documented on the 2019 A-Class W177 A180 with the M282.914 1.3L petrol engine. It is also listed for later 3.0L mild-hybrid applications such as E450, CLS450, GLE450 and AMG variants.
Exact compatibility varies by engine, model year and vehicle specification. Please verify the VIN before purchase.
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