Audi S4 Starter Replacement Guide: 2000-2016 Models
Is your Audi S4 clicking, cranking slowly, or refusing to start? It's likely a failing starter.
- Always test the battery and its connections first to rule out a simple electrical issue.
- For B6/B7 S4s with the 4.2L V8, expect extremely high labor costs due to the starter's location under the intake manifold.
- Due to the high labor cost across all models, choosing a new, high-quality aftermarket starter from an OEM supplier like Bosch or Valeo is the most cost-effective long-term decision.
- This is not a recommended DIY job for most home mechanics due to the complexity and need for special tools.
Is Your Audi S4 Starter Failing?
Before you can start your S4, the starter has to do its job. But like any part, it wears out over time. Recognizing the signs of a failing starter can save you from being stranded. The most important first step is to make sure your battery is fully charged and the terminals are clean and tight, as a weak battery can mimic starter problems.
Symptoms of a Bad Starter
- Clicking Sound: A single, loud click or a series of rapid clicks when you try to start the car is a classic sign. This often means the starter solenoid is activating, but the motor itself isn't turning the engine.
- Slow Engine Crank: If the engine turns over much slower than usual, like it's struggling, the starter motor may be getting weak.
- No Sound at All: You turn the key, the dashboard lights come on, but you hear nothing. This can point to a completely failed starter motor or solenoid.
- Intermittent Starting: The car starts fine one day but not the next. This can be caused by worn electrical contacts inside the starter.
- Grinding Noise: A grinding sound during or after the engine starts can indicate a problem with the starter gear not disengaging correctly from the engine's flywheel.
Generation Differences in Starter Replacement
Not all 2000-2016 S4 models are the same when it comes to starter replacement. The location of the part and the labor involved vary significantly by engine type.
B6/B7 S4 (2003-2009) 4.2L V8 Warning
The starter on the 4.2L V8 engine is located in the valley of the engine, underneath the entire intake manifold. This is an extremely labor-intensive job. While some shops may quote an engine-out service, a skilled mechanic can perform the replacement by removing the intake manifold. Expect very high labor costs for this repair, often exceeding the cost of the part itself by a large margin.
🎬 See this walkthrough of the complex V8 starter replacement- B5 S4 (2000-2002) 2.7L Twin-Turbo V6: The starter is on the passenger side, tucked behind the alternator. Access requires putting the front end into the "service position" and removing several components to reach it.
- B8/B8.5 S4 (2010-2016) 3.0L Supercharged V6: The starter is located under the engine, above the passenger-side axle. Access is also very difficult and typically requires removing the engine mount and alternator. 🎬 Watch: A helpful shortcut for B8 S4 starter removal
Choosing the Right Aftermarket Starter
Given the high labor costs for any S4 starter replacement, this is not a part where you want to cut corners. A failing replacement part means paying for that expensive labor all over again. Aftermarket starters fall into different quality tiers.
- OEM-Quality Brands (Bosch, Valeo): Bosch and Valeo are known original equipment suppliers for Audi. Choosing a new starter from one of these brands is the safest option and ensures you are getting a part that meets or exceeds factory specifications. These are considered top-tier choices.
- Reputable Aftermarket Brands (Remy): Brands like Remy have a long history in the aftermarket and offer a good balance of quality and price. A new unit from a brand like this is a solid choice if an OEM-supplier part is not available.
- Remanufactured Starters: A remanufactured starter from a top brand like Bosch or Valeo can be a good value, as they are rebuilt to factory specs with new wear components. However, the quality can vary more than with a new unit. Given the labor costs, a new starter is often the recommended choice for peace of mind.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Bosch, Valeo, Remy) | $136 - $440 |
| New OEM (Dealer) | $484 - $729+ |
| Shop Labor | $493 - $724+ (Varies greatly by engine) |
Frequently Asked Questions
Why is the starter replacement so expensive on my V8 S4?
The high cost is almost entirely due to labor. The starter is buried deep in the engine valley under the intake manifold, making it very difficult and time-consuming to access. A mechanic needs to remove many other components just to reach it.
Can I replace the starter myself?
For the average DIY mechanic, this is not a recommended job on any S4 model. The B6/B7 V8 and B8 3.0T versions are particularly difficult, requiring specialized tools and extensive knowledge of the vehicle. Even on the B5, it requires significant disassembly of the front end.
How can I be sure it's the starter and not the battery?
First, try jump-starting the car. If it starts right up, your battery is the likely culprit. You can also take your battery to an auto parts store to have it tested. If the battery is good and you still have starting symptoms like a loud click, the starter is the next component to inspect.
🎬 Watch: Diagnosing a real-world Audi S4 no-start issueShould I buy a new or remanufactured starter?
For the Audi S4, a new starter from an OEM-quality brand like Bosch or Valeo is highly recommended. The labor to replace this part is so high that the extra cost for a brand-new unit is a worthwhile investment to ensure you don't have to do the job twice.
Helpful Videos
Technical Specifications
OEM Part Numbers: 079911023D 079911023DX 079911022
Power ratings typically range from 1.7kW to 2.0kW. Voltage is 12V. Rotation is Clockwise (CW). Tooth count is typically 9 or 10 teeth. Always verify the exact part number for your specific year and engine.
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: