Audi S4 Engine Camshaft Position Sensor Replacement Guide (2018-2023)
Is your S4 running rough or failing to start? A bad camshaft position sensor could be the simple fix you need.
- A failing camshaft sensor will cause a check engine light, rough running, and potential no-start or stalling issues.
- For this part, a Genuine Audi sensor is recommended as it is similarly priced to quality aftermarket options.
- The B9 S4 has two sensors; a diagnostic scan can tell you which one (Bank 1 or Bank 2) needs replacement.
- Replacement is DIY-friendly, requiring basic tools and about 30 minutes to an hour of time.
Symptoms of a Failing Camshaft Position Sensor in an S4
When a camshaft position sensor starts to fail, your S4's computer gets confusing information. This can cause a variety of noticeable problems. The most common sign is the Check Engine Light turning on. You might also experience a rough idle, poor acceleration, or a general loss of power. In more serious cases, your car may take a long time to start or fail to start at all. Some owners report the engine stalling unexpectedly, which can be a safety concern.
Diagnostic Trouble Codes (DTCs)
🎬 Watch: Understanding Audi camshaft sensor codes and hall senders.If your Check Engine Light is on, a code scanner will likely show codes related to the camshaft position sensor. Common codes for this issue include P0341 (Camshaft Position Sensor 'A' Circuit Range/Performance Bank 1) or P0346 (Bank 2). Your S4 has two of these sensors, one for each cylinder bank.
Choosing the Right Aftermarket Sensor
When it comes to electronic sensors for a high-performance engine like the one in your S4, quality matters. While many aftermarket parts offer good value, engine sensors are one area where it's often best to avoid the cheapest options.
- OEM/Genuine Audi: The original factory part offers the best guarantee of compatibility and longevity. Surprisingly, the price for a genuine Audi sensor is very competitive with higher-quality aftermarket options.
- Walker Products: This is a well-regarded aftermarket brand that designs its parts to meet or exceed original specifications. They are a solid choice if you are looking for a quality alternative to the dealer part.
- URO Parts: URO is known for providing budget-friendly replacement parts. While it may be a functional replacement, the general consensus for critical sensors on German vehicles is to invest in a higher-tier brand for long-term reliability.
Pro Tip: Given the small price difference between aftermarket brands and the Genuine Audi part for this specific sensor, choosing the OEM part is a wise investment for peace of mind.
Estimated Replacement Costs
The cost to replace a camshaft position sensor is reasonable, especially if you do it yourself. The part itself is not expensive, and labor time is low.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Sensor | $48 - $57 |
| New OEM (Genuine Audi) Sensor | $50 - $85 |
| Shop Labor | $90 - $200 |
| Total Professional Replacement | $140 - $285 |
Frequently Asked Questions
How many camshaft position sensors does my 2018-2023 Audi S4 have?
Your Audi S4's 3.0L V6 engine has two camshaft position sensors, one for each cylinder bank (Bank 1 and Bank 2).
Where are the camshaft position sensors located?
The sensors are typically located on the back of the cylinder heads, near the top of the engine. You will need to remove the plastic engine cover 🎬 See a detailed teardown of the S4 B9 V6 engine. to see them. Access can be a little tight, but they are held in by only a single bolt each.
Is this a difficult part to replace myself?
No, this is a DIY-friendly repair for most people with basic tools. The process involves unplugging the electrical connector, removing one T30 Torx bolt, and carefully pulling the old sensor out. The main challenge is simply reaching the sensor's location.
What happens if I don't replace a bad sensor?
Ignoring a failing camshaft position sensor will lead to continued poor engine performance, bad fuel economy, and difficulty starting. The most significant risk is that the engine could stall while you are driving, which is a serious safety hazard.
Helpful Videos
![How to Fix AUDI P0341 Engine Code in 3 Minutes [2 DIY Methods / Only $9.76]](https://img.youtube.com/vi/MFxepqWwnb4/mqdefault.jpg)
Technical Specifications
OEM Part Numbers: 06M907601G 06M907601D 06M907601
This is a Hall effect sensor with a 3-pin connector, held in place by a single Torx bolt.
We Have This Part in Stock
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 S4: