Audi A8 Quattro Engine Camshaft Position Sensor Guide (2005-2011)
Solve rough idling, stalling, and check engine lights by choosing the right sensor for your D3 A8.
- Your 2005-2011 Audi A8 4.2L V8 has four camshaft position sensors; a diagnostic scan is needed to identify the faulty one.
- Symptoms of failure include a check engine light, rough running, stalling, and poor acceleration.
- For best results and reliability, choose an OEM supplier brand like Bosch, or a high-quality aftermarket brand like Hella, Vemo, or Delphi.
- Replacement is a feasible DIY job for those with basic tools, with sensors located at the top front of the engine.
Understanding Camshaft Position Sensor Failure in Your A8
When a camshaft position sensor on your 2005-2011 Audi A8 Quattro starts to fail, it sends incorrect or no data to the engine computer. This can cause a range of noticeable engine problems. Because these sensors are electronic components exposed to constant heat and vibration, they can wear out over time. Oil leaks in the engine bay are also a common cause of sensor failure.
Symptoms of a Bad Sensor
A failing camshaft position sensor can make your A8 difficult to drive. The most common sign is the check engine light illuminating on your dashboard. You may also experience poor drivability, such as engine hesitation, sputtering, a rough idle, or a sudden loss of power while accelerating. In more serious cases, the engine may stall unexpectedly or fail to start at all.
Don't Ignore the Signs
While you might be able to drive with a bad sensor, it's risky. The engine could stall at any time, such as in traffic or on the highway, increasing the risk of a crash. It's best to get the issue diagnosed and repaired promptly.
Choosing the Right Aftermarket Sensor
When shopping for a replacement, you'll find a wide range of brands and prices. For a complex vehicle like the Audi A8, the quality of electronic components is crucial. Using a low-quality sensor can lead to continued performance issues or premature failure, forcing you to do the job again.
Here’s a breakdown of aftermarket brand tiers to help you choose:
- Premium (OEM/OES): Brands like Bosch are often the original equipment manufacturer for Audi. Choosing a Bosch sensor ensures you are getting the same quality and performance as the part your car was built with. Other high-quality German brands like Hella and Vemo are also trusted choices that meet or exceed OEM specifications.
- Quality Aftermarket: Brands such as Delphi, Spectra, and Standard Ignition (SMP) have a solid reputation for producing reliable engine management components. They offer a good balance of quality and price, often with direct-fit connectors and robust construction.
- Economy: Brands in this category, like URO Parts or other lesser-known names, offer a significant cost saving. However, for a critical sensor on a high-performance German engine, this is often a gamble. While they may work initially, their long-term reliability and signal accuracy can be inconsistent. For the A8, it is generally recommended to invest in a premium or quality aftermarket brand to avoid future headaches.
Pro Tip: Replace in Sets?
Your A8 has four camshaft position sensors. While you only need to replace the one that has failed, keep in mind that they have all been exposed to the same age and conditions. If one fails, others may not be far behind. If your budget allows, consider replacing them in pairs (both intake or both exhaust sensors) or all four at once for peace of mind.
Cost of Replacing an Audi A8 Camshaft Position Sensor
The total cost depends on whether you do the job yourself or take it to a repair shop. The parts themselves vary widely in price based on the brand.
| Part/Service | Estimated Cost |
|---|---|
| New OEM Sensor (Dealer) | $110 - $160 each |
| New Aftermarket Sensor | $21 - $136 each |
| Shop Labor | $100 - $200 |
| Total (DIY, Aftermarket) | $21 - $136 |
| Total (Shop, Aftermarket) | $121 - $336 |
Cost estimates are approximate and can vary based on your location and the specific repair shop.
Frequently Asked Questions
How many camshaft position sensors does my 2005-2011 A8 Quattro have?
Your Audi A8 4.2L V8 has four camshafts (two per cylinder bank) and therefore has four camshaft position sensors. The specific sensor that has failed will be identified by a diagnostic trouble code (DTC).
Where are the sensors located?
The sensors are located on the front of the engine, near the top, on the cylinder head covers. Two are on the passenger side (Bank 1) and two are on the driver's side (Bank 2). 🎬 Watch: Understanding Audi camshaft sensor codes and hall senders. Access may require removing the engine's plastic beauty covers.
🎬 See this step-by-step walkthrough for replacing the sensor.What are the common fault codes for a bad camshaft sensor?
A check engine light will be accompanied by specific codes. For Bank 1 (passenger side), you may see P0340 or P0341. 🎬 Watch: How to quickly fix a P0341 engine code. For Bank 2 (driver's side), you may see P0345 or P0346. Other correlation codes like P0016, P0018, or P0019 might also appear, sometimes pointing to issues with the camshaft adjustment solenoids.
Is an OEM sensor from the dealer better than an aftermarket one?
For sensitive electronics on German vehicles, using an OEM part or a part from an OEM supplier like Bosch is highly recommended. While more expensive, they guarantee correct fitment, accurate signaling to the ECU, and long-term reliability. Cheaper aftermarket sensors can sometimes cause persistent performance issues or fail quickly.
Are there any recalls for this part?
There are no specific recalls issued by the NHTSA for the camshaft position sensors on the 2005-2011 Audi A8 Quattro. However, some Technical Service Bulletins (TSBs) exist for related camshaft position correlation faults, which sometimes point to issues with camshaft adjustment valves rather than the sensors themselves.
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Technical Specifications
OEM Part Numbers: 07L905163A 06E905163 07L905163C 07L905163
The sensors for the 2005-2011 Audi A8 Quattro are typically 3-pin Hall effect sensors. They are located on the cylinder heads to monitor the intake and exhaust camshafts for both Bank 1 and Bank 2.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Audi A8 Quattro: