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Used Audi A4 Engine Knock Sensor
All used Audi A4 Engine Knock Sensor listed on Breakeryard.com are tested, original (OEM) manufacturer parts and come with a 14 day money back guarantee. Breakeryard.com list cheap new OES or aftermarket car parts at discounted prices or used OEM car parts up to 80% cheaper than main dealer prices for Audi A4 from premium breaker yards from across the UK.
About Engine Knock Sensor
Timing and temperature are crucial in a vehicle's ignition system in order for combustion to occur correctly and for the engine to perform at its best. In an engine, when fuel is not ignited properly/at the right time it produces an explosion that can ruin the finely-tuned cycle of the engine, and can lead to damaged engine components. These little explosions are referred to as engine knock or detonation, and produce a knocking or pinging sound in the engine. The A4 Audi engine knock sensor functions to detect harmful engine vibrations caused by engine knock and this information is used to determine ignition timing and prevent further detonation.
Positioned on the intake manifold, engine block or cylinder head, the engine knock sensor works by sending a signal to the car's ECU (Electronic Control Unit) which will use this information to adjust the ignition timing to protect the engine from what is known as pre-ignition; the fuel combusting and burning before it is ignited by the spark plug.
If the fuel burns in the engine before it should, usually due to the engine's compression being too low, this can lead to a build-up of carbon deposit and debris. When these deposits accumulate in the cylinder head, the air and fuel mixture does not have enough space, leading to compression being too high in the cylinders, which results in engine knock. The engine-knock-sensor functions to detect when this is happening and with the help of the ECU avoid this pre-ignition.
If there is a problem with the engine knock sensor the warning light should illuminate on the dashboard of the car. Signs of a malfunctioning engine knock sensor can include a loss of acceleration and the vehicle not achieving as many miles to the gallon as usual. It's advisable to seek advice from a mechanic to establish the exact cause of the fault. When you need to replace this part, the A4 Audi engine knock sensor is the ideal choice, designed to be compatible with the make and model of your vehicle.
Audi A4 trivia
- The 2001 version of the Audi A4 saw a lot more technology included, as well as independent rear suspension. It became an immediate best-seller in every country it was marketed in.
- The Audi A4 was the first Audi vehicle to do away with the old 80/90 naming convention. The result was an incredible success, and the A4 firmly placed Audi in the premium car category.
- The website YouGov says that the Audi A4 is the 5th most popular car in the UK. It also claims the A4 is the 26th most famous car in Britain, with fans of the vehicle describing it consistently as comfortable, smooth, modern, and that it has a big boot.
- In the US, the Audi A4 was particularly successful, and there was a point where demand completely outstripped supply. It took six months for Audi to boost production speed to keep up with the unexpected success of the car.
- The 1.8-litre 20v engine in an Audi A4 is the first Audi engine to have five valves per cylinder. The engine design was based on the Audi Sport Supertouring car.