Knock sensor A0031538928

Description

Knock sensor by MERCEDES, catalog number A0031538928. Confirmed catalog fitment: Alfa Romeo 159 939 (2005–2011), Alfa Romeo 159 939 (2006–2011), Citroen BERLINGO M (1996–2008), Citroen BERLINGO MF (1996–2008), Citroen C4 I LA (2004+) and other body variants. For an accurate match, compare the number and identification with the removed part and confirm the vehicle specification by VIN. The fitment list is a reference and does not replace a vehicle-specific compatibility check.

KNOCK SENSOR. The knock sensor is an engine management component designed to detect abnormal combustion vibrations (knocking) within the engine block. It monitors specific frequency vibrations caused by detonation and sends signals to the engine control unit (ECU), which adjusts ignition timing to protect the engine from damage. The sensor typically consists of a piezoelectric element housed in a metal body with an electrical connector. It is mounted directly to the engine block and operates under high temperature and vibration conditions. Proper function ensures optimal engine power, fuel efficiency and protection against harmful detonation. Failure may result in reduced engine performance, increased fuel consumption, unstable operation, ignition-related fault codes or limp mode activation. Common issues include internal sensor failure, poor electrical connection, housing corrosion or wiring damage. Our catalog includes genuine OEM knock sensors, quality aftermarket replacements and tested used units without cracks or connector damage. Used parts are inspected for housing integrity, connector condition and signal functionality. Selection is based on VIN number, engine type and part number. Timely replacement ensures reliable engine protection, stable performance and extended engine life.

Compatibility

Fits 115 vehicles

Nothing found

About the manufacturer · MERCEDES

Mercedes‑Benz is a German premium automotive brand and one of the oldest automobile manufacturers in the world, with its history dating back to 1886 when Karl Benz created the first gasoline‑powered automobile. Today the...

Mercedes‑Benz is a German premium automotive brand and one of the oldest automobile manufacturers in the world, with its history dating back to 1886 when Karl Benz created the first gasoline‑powered automobile. Today the brand is part of Mercedes‑Benz Group and is recognized globally as a leading manufacturer of passenger cars, commercial vehicles and genuine automotive spare parts. Under the Mercedes‑Benz brand a wide range of original components is produced for the company’s vehicles, including engine parts, cooling system components, suspension elements, braking systems, transmission components, electronic modules, body parts and various maintenance and service items. Genuine Mercedes‑Benz parts are designed according to strict factory engineering standards and undergo comprehensive quality control throughout the production process. This ensures precise fitment, reliable performance and full compatibility with the vehicles they are intended for. According to feedback from car owners and automotive repair professionals, Mercedes‑Benz genuine parts are highly regarded for their excellent build quality, long service life and dependable operation even under demanding driving conditions. Many users also highlight the perfect fit and ease of installation of original components. The most frequently mentioned drawback is the relatively high price compared with many aftermarket alternatives, although many vehicle owners consider the cost justified due to the durability, safety and preservation of the vehicle’s original factory performance.

Additional information

Knock sensor by MERCEDES, catalog number A0031538928, is listed for vehicle repair or maintenance. The catalog identifies the item as “Knock sensor”. Confirmed catalog fitment: Alfa Romeo 159 939 (2005–2011), Alfa Romeo 159 939 (2006–2011), Citroen BERLINGO M (1996–2008), Citroen BERLINGO MF (1996–2008), Citroen C4 I LA (2004+), Citroen C4 I LC (2004+) and other body variants. Fitment is based on the catalog links between the part and vehicle bodies. It helps narrow the search, but final compatibility must be confirmed for the exact vehicle specification. The primary ordering references are part number A0031538928 and manufacturer MERCEDES. Parts can differ within the same vehicle model by production year, engine, transmission, installation side, or position. Before purchase, compare the number and identification with the removed component and verify body, year, and specification by VIN. Also compare appearance, connectors, mountings, dimensions, and included items whenever those details are relevant to this part.

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