A Guide to the 2006-2012 Audi A6 Quattro Fuel Pump Module Assembly
Understand common fuel pump problems in your C6 A6 Quattro and learn how to choose the right replacement part.
- A failing fuel pump will give clear warnings like engine hesitation, stalling, hard starts, and a whining noise from the rear seat area.
- A P0087 code indicates low fuel pressure but requires diagnosis to confirm if the in-tank pump, HPFP, or filter is the cause.
- Always replace the fuel filter when installing a new fuel pump to prevent premature failure of the new part.
- Stick to high-quality aftermarket brands like Continental (an OEM supplier) or Delphi to ensure reliability and longevity.
Understanding Fuel Pump Failure in Your A6 Quattro
The fuel pump is essential for your engine to run. When it starts to fail, it can cause a range of frustrating and potentially serious problems. For the 2006-2012 (C6 generation) Audi A6, fuel delivery issues can stem from either the in-tank low-pressure pump or the engine-mounted high-pressure fuel pump (HPFP). This guide focuses on the in-tank Fuel Pump Module Assembly, which is the primary pump that feeds the entire system.
Common Symptoms of a Failing Fuel Pump
A weak or failing fuel pump will starve your engine of the fuel it needs. Watch out for these common warning signs:
- Engine Stalling: The engine may stall unexpectedly, sometimes while driving, which can be dangerous.
- Hard Starting or No Start: You may have to crank the engine for a long time before it starts, or it may not start at all. This happens because the pump isn't building enough pressure in the fuel lines.
- Hesitation and Power Loss: When you accelerate, the car might sputter or feel sluggish because the pump can't keep up with the engine's demand for more fuel.
- Whining Noise: A noticeable humming or whining sound from the rear seat area (above the fuel tank) is a classic sign 🎬 Watch this video to identify common Audi fuel pump problems. of a pump motor working too hard and about to fail.
- Check Engine Light: A common trouble code associated with low fuel pressure is P0087 (Fuel Rail/System Pressure - Too Low). However, this code can also be caused by a bad high-pressure pump or a clogged filter, so proper diagnosis is key. 🎬 See this guide on diagnosing and fixing the P0087 code.
Important: Check for Recalls
Audi issued a safety recall (NHTSA Campaign ID: 16V730000, Audi code 24BZ) for some 2012-2013 A6 models due to a fuel hose that could leak. The fix involved replacing the hose and, as a precaution, the in-tank fuel pump. Even if your vehicle is outside this specific range, it's always wise to check for any open recalls with your VIN on the NHTSA website.
Choosing the Right Aftermarket Fuel Pump: Brand Quality
When replacing the fuel pump in your Audi, quality matters. Using a low-quality part can lead to premature failure, leaving you stranded again. For the A6 Quattro, sticking with reputable OEM-level brands is the best approach.
Continental: Continental is a massive German automotive supplier and is often the original equipment manufacturer (OEM) for many Audi parts. Choosing a Continental fuel pump is essentially like buying the original part without the dealer markup. They are engineered to meet the exact specifications for performance and longevity that your vehicle requires.
Delphi: Delphi is another top-tier global OEM supplier known for its advanced fuel system technology. Their fuel pumps are designed for reliability and are a trusted choice in the aftermarket. While some online forums mention isolated issues with specific applications, Delphi is generally considered a high-quality brand suitable for European vehicles.
Pro Tip: Since Continental is a known OEM supplier for VW/Audi, it is often the safest bet for a direct, high-quality replacement. However, a Delphi pump from a trusted vendor is also a very reliable option.
Replacement Cost Comparison
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Continental, Delphi) | $270 - $395 |
| New OEM (Dealer) | $550 - $750+ |
| Shop Labor | $200 - $400 |
*Prices are estimates and can vary based on location and supplier.
Frequently Asked Questions (FAQ)
Where is the fuel pump located on a 2006-2012 A6 Quattro?
The low-pressure fuel pump module assembly is located inside the fuel tank. You can access it by removing the rear seat cushion and opening an access panel on the passenger side.
Is this a difficult DIY job?
For a moderately experienced DIYer, it is feasible. The process involves removing the back seat, opening the fuel tank access cover, disconnecting fuel lines and electrical connectors, and removing a large lock ring. It requires care, especially when working with gasoline. If you are not comfortable with this, it's best to have a professional mechanic do the job. The estimated time is around 2-3 hours.
🎬 Watch: How to replace the fuel control module on an A6.Do I need to replace the fuel filter at the same time?
Yes, it is highly recommended. A clogged fuel filter can restrict flow and put extra strain on your new fuel pump, causing it to fail prematurely. Replacing the filter is a cheap and easy way to protect your investment.
My car shows code P0087. Does that mean the in-tank pump is bad?
Not necessarily. A P0087 code means fuel pressure is too low, but it doesn't specify where the problem is. It could be the in-tank pump, a clogged fuel filter, a failing high-pressure fuel pump (HPFP) on the engine, or even a faulty sensor. A full diagnosis is needed before replacing parts.
What is a Technical Service Bulletin (TSB) and are there any for this part?
A TSB is a notice from the manufacturer to its dealers about a common problem and a recommended fix. Audi issued TSB 2020884/4 for issues where the fuel gauge reads empty after refueling, caused by a wiring connection problem inside the fuel pump module. This TSB involves a repair kit for the wiring, not necessarily a full pump replacement, highlighting the importance of correct diagnosis.
Helpful Videos
Technical Specifications
OEM Part Numbers: 4F0919087G 4F0919087E 4F0919051M
This is the in-tank, low-pressure fuel pump module assembly. It is typically accessed from under the rear passenger seat. The assembly includes the pump, sending unit for the fuel gauge, and strainer.
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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 A6 Quattro: