2011-2017 Audi S8 Engine Oil Level Sensor: A Vehicle-Specific Guide
Your S8 doesn't have a dipstick, making this sensor the only way to check your oil.
- A faulty sensor is the most likely cause of an 'Oil Level Sensor Defective' warning, but it should be diagnosed properly.
- For 2013-2017 models, verify the critical 21H7 turbo oil strainer recall has been performed before addressing sensor issues.
- Replacement is a simple DIY task if you can change your own oil, but do not over-tighten the sensor's plastic housing.
- If the warning light doesn't reset after replacement, check the hood latch switch before further troubleshooting.
Symptoms of a Failing Oil Level Sensor
A bad oil level sensor can cause confusing warnings on your dashboard. The most common sign is an intermittent or constant yellow warning light that says "Oil level sensor defective". You might also see a "Minimum oil level" warning, prompting you to add oil even when the level is correct. In less common cases, a faulty sensor can incorrectly report that the oil level is too high. These false warnings are the primary symptom, as the sensor itself is a simple electronic part that either works or it doesn't. It's important to manually verify your oil level with a trusted mechanic if you suspect a sensor failure before adding more oil, as overfilling can cause engine damage.
Important Note on a Related Recall
While there are no recalls for the oil level sensor itself, 2013-2017 S8 models were subject to a critical recall (Audi code 21H7) for a clogged turbocharger oil strainer. A low oil level or pressure warning can be a symptom of this much more serious issue. Before replacing the oil level sensor, it is crucial to contact an Audi dealer with your VIN to ensure this recall service has been completed to prevent catastrophic turbo failure.
Choosing the Right Aftermarket Sensor
When replacing a critical electronic sensor on a high-performance German vehicle, the choice between Original Equipment (OEM) and aftermarket parts is important. The OEM sensor, part number 06E907660, is the benchmark for reliability and is guaranteed to be compatible.
For aftermarket options, quality can vary. Vemo is a German brand that specializes in electronic parts for European vehicles and is generally considered a higher-tier aftermarket supplier. User reviews suggest Vemo sensors can be a reliable alternative, with some noting they fit and function like the original part where cheaper brands failed. Given that the Vemo sensor is priced similarly to the OEM part, the choice comes down to availability and brand preference. For a critical component like this, sticking with OEM or a reputable OEM-equivalent brand like Vemo is a wise investment to avoid repeat repairs.
Cost of Replacing the Audi S8 Engine Oil Level Sensor
| Part Type | Estimated Cost |
|---|---|
| New OEM | $145 - $227 |
| New Aftermarket (Vemo) | $223.71 |
| Shop Labor | $118 - $174 |
Pro Tip: Check the Hood Latch Switch
On many Audis, the oil level warning light will not reset until the system detects that the hood has been opened and closed. A faulty hood latch switch can prevent this reset, making you think the new sensor is also bad. If you replace the sensor and the light remains, investigate the hood latch switch before performing more complex diagnostics.
Frequently Asked Questions (FAQ)
Is it hard to replace the oil level sensor on an S8?
No, it is a fairly straightforward job for someone comfortable with changing their own oil. The sensor is on the bottom of the oil pan, held by three small bolts. The process involves draining the oil, removing an underbody tray, unplugging and unbolting the old sensor, and then installing the new one before refilling the oil. The estimated time is around 1 to 1.5 hours.
Can I drive with a defective oil level sensor warning?
Yes, but with extreme caution. If the sensor is faulty, you have no way of knowing your actual oil level. You risk either running the engine low on oil, which can cause catastrophic damage, or overfilling it. It is best to have the vehicle inspected by a qualified mechanic as soon as possible.
Is there a TSB for the oil level sensor on the Audi S8?
Yes, Audi has issued Technical Service Bulletin (TSB) 2059366/1 which addresses the "Oil minimum warning" message and provides dealers with a procedure to test and replace the sensor if it is found to be faulty. This confirms it is a recognized issue.
Why is my MMI showing the oil level is unavailable?
To get a reading, the engine must be at normal operating temperature. After shutting the engine off, you must wait at least two minutes for the oil to settle in the pan before the MMI will display a level. If it still won't display a reading after following this procedure, the sensor may have failed.
Technical Specifications
OEM Part Numbers: 06E907660 06E907660C
Located in the lower engine oil pan. Secured with three bolts. Functions as a thermal level and temperature sensor.
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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 S8: