A Guide to Direct Ignition Coils for the 2009-2020 Audi TT Quattro
Experiencing engine misfires or a rough idle? Your ignition coils are the most likely cause.
- Ignition coil failure is a very common problem on the 2009-2020 Audi TT Quattro.
- Always replace all four coils and the spark plugs at the same time for best results.
- A flashing check engine light means stop driving to avoid damaging the catalytic converter.
- Choose a quality OEM-equivalent brand like Bosch, Denso, or NGK for proven reliability.
Is Your Audi TT Quattro Running Rough?
Ignition coil failure is one of the most common issues for the 2.0T engine in the 2009-2020 Audi TT Quattro. These parts work hard in a hot engine bay and eventually wear out. When a coil starts to fail, it can't deliver enough voltage to the spark plug, leading to an incomplete burn of fuel in the cylinder. This causes symptoms that are hard to ignore and should be addressed quickly to prevent more expensive damage.
Symptoms of a Failing Ignition Coil
- Engine Misfires: The most common sign. You'll feel a jerking or stumbling from the engine, especially when you accelerate.
- Flashing Check Engine Light: A flashing light indicates a severe misfire that could damage your catalytic converter. A solid light will also come on for less severe misfires.
- Rough Idle: Your car may shake or vibrate while stopped at a light.
- Loss of Power: The car will feel sluggish and slow to respond.
- Worse Fuel Economy: An inefficient engine burns more fuel.
- Difficulty Starting: A weak spark can make it hard for the engine to turn over.
Known Issue: Technical Service Bulletins (TSB)
Audi has acknowledged issues with ignition coils on these engines. TSB 2033561/2 was issued for premature failure on some early Bosch coils (part numbers ending in 115, 115 A, and 115 B). A later TSB (28G6) recommends replacing faulty coils with an updated design, such as part number 07K905715F or a newer version, to prevent future problems. When buying aftermarket parts, look for brands that meet or exceed the specifications of these updated OEM parts.
Choosing the Right Aftermarket Ignition Coil
You don't need to buy the most expensive coil, but you should avoid the cheapest, no-name options. For a daily driven TT Quattro, reliability is key. It is highly recommended to replace all four ignition coils at the same time, as they tend to fail around the same time.
Brand Quality Tiers
- OEM-Equivalent Brands (Best Choice): These companies are often the original suppliers to Audi or have a long history of making high-quality parts for German cars. They offer proven reliability and performance. Look for brands like Bosch, Denso, NGK, Hella, and Bremi.
- Performance Brands (Optional Upgrade): Brands like Accel market their coils with claims of higher voltage output for better performance. While some users report a smoother idle, many experts and enthusiasts agree that for a stock or lightly tuned engine, there is no noticeable performance gain over a quality OEM-style coil.
- Standard Aftermarket Brands: Brands like Vemo, Facet, Prenco, and Beck Arnley offer a balance of value and quality. Beck Arnley often repackages parts from various sources, which can sometimes be the OEM part in a different box. These are generally reliable for standard replacement needs.
Pro Tip: Replace Your Spark Plugs, Too
Worn-out spark plugs can put extra strain on your new ignition coils, causing them to fail early. Since you already have the coils out, it's the perfect time to replace the spark plugs. This is a simple, inexpensive step that ensures your entire ignition system is refreshed.
Cost to Replace Audi TT Quattro Ignition Coils
| Part Type | Price Range (Set of 4) |
|---|---|
| New Aftermarket | $157 - $298 |
| New OEM | $200 - $400+ |
| Shop Labor | $75 - $150 |
Cost estimates are for reference only and may vary by location and supplier. Aftermarket prices based on the provided range of $39.32 - $74.36 per coil.
Frequently Asked Questions
Is replacing the ignition coils a DIY job?
Yes, this is one of the easiest repairs you can do on your Audi TT. The coils are located directly on top of the engine, accessible after pulling off the plastic engine cover. The job requires only basic hand tools and can be completed in under 30 minutes.
🎬 See this walkthrough for replacing your coil packs and spark plugs.Should I replace just the one bad coil?
No. It is strongly recommended to replace all four ignition coils at once. Ignition coils are subjected to the same amount of heat and wear, so if one has failed, the others are likely not far behind. Replacing them all at once saves you from repeating the job in the near future.
What happens if I don't replace a bad ignition coil?
Continuing to drive with a misfiring cylinder can cause serious and expensive damage. Unburned fuel can get into your exhaust system and destroy the catalytic converter, a repair that costs thousands of dollars.
Are the red 'R8' ignition coils an upgrade?
The red ignition coils, often associated with the Audi R8, became a popular visual upgrade for the 2.0T engine. While some claim they provide a hotter spark, there is little to no evidence they offer any real performance benefit on a stock engine compared to a quality standard replacement coil. They are, however, generally considered a reliable OEM-quality option.
🎬 Watch this DIY guide for installing red R8 ignition coils.Helpful Videos
Technical Specifications
OEM Part Numbers: 06H905110G 06H905110H 06H905110L 06J905110G 06K905110D 07K905715F
This vehicle uses a 'coil-on-plug' direct ignition system with one coil per cylinder. The coils are a push-down type, not a bolt-down design on these EA888 engines.
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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 TT Quattro:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Audi TT Quattro Running Rough?
- Symptoms of a Failing Ignition Coil
- Known Issue: Technical Service Bulletins (TSB)
- Choosing the Right Aftermarket Ignition Coil
- Brand Quality Tiers
- Pro Tip: Replace Your Spark Plugs, Too
- Cost to Replace Audi TT Quattro Ignition Coils
- Frequently Asked Questions
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