Genuine VW/Audi Ignition Knock (Detonation) Sensor | 07K905377E
Make Sure It Fits
Audi: TT. 2.5L, green.
Knock sensors monitor the pre-detonation of the air-fuel mixture in an internal combustion engine. Pre-detonation occurs when part of the air-fuel mixture ignites before normal combustion creating a shockwave that resonates through the engine block that emits an audible knocking or pining sound. When the knock sensor detects the knock or ping, it relays that information to the engine computer so the computer can adjust engine timing and the amount of fuel entering the engine to stop the pre-detonation. Prolonged pre-detonation in one or more cylinders can damage the cylinder walls, pistons, cylinder head gasket, cylinder head, spark plugs, and engine valves.
When a knock sensor detects engine knock for a prolonged timeframe, the engine computer will illuminate the check engine light with a fault code indicating excessive engine knocking that can not be stopped by adjusting timing and fuel entering the engine. Excessive engine pressure due to carbon build-up in a cylinder, excessive engine load, an improperly timed engine, and lower than recommended octane fuel can all cause excessive knocking that the engine computer can not adjust for.Replacing Your Vehicle's Knock Sensor
Knock sensors are mounted directly to the exterior of the engine block to pick up the vibrations created by pre-detonation. However, due to their location, they can often be challenging to access and may require extensive removal of components such as intake or exhaust manifolds to replace. With that in mind, on average, knock sensors can take between 20 minutes to up to four hours to replace.
View more Genuine VW/Audi Knock Sensors.
Frequently Viewed Together
We found 1 additional part(s) that are frequently viewed together.
- 00004320435 OEMFactory specified sealing compound for engine case, cylinder head,...$19.69Reg$20.51List$31.87
Why Buy OEM & Genuine Replacement Auto Parts from AutohausAZ?
Auto parts at wholesale prices is what you will find at AutohausAZ. Have you been searching the web for auto parts for your vehicle? You have come to the right place! Here at Autohaus, we strive to offer low prices on quality replacement parts and providing first rate customer service.
Flat-Rate Standard Shipping
AutohausAZ offers discounted flat-rate Standard shipping on any auto parts orders shipped within the Continental USA.Learn More About Our Shipping
EZ Parts Returns
Your auto parts purchases are protected by AutohausAZ's customer-friendly returns policy.Learn More About Our Returns Policy
3-Years/36-Months Auto Parts Warranty
AutohausAZ offers industry-leading 3-years/36-months warranty on all auto parts purchases.Learn More About Our Warranty
Faster One-Page Checkout
We streamlined our checkout process to get your order on the way faster.Learn More About Our Checkout Process
Discounted International Shipping
AutohausAZ offers 65% discount on UPS shipping options for our international customers.Learn More About Our International Shipping
Customers Love Us
Check out what customers have to say about AutohausAZ on Google.Read Our Reviews on Google
What This Genuine VW/Audi Ignition Knock (Detonation) Sensor Fits?
Application information below is for reference only and should not be used to determine the exact vehicle fitment. Please use the "Make Sure It Fits" vehicle selection box above to determine the exact fitment and review any application notes. If you need any help determining if this part works with your vehicle, please don't hesitate to contact us.