2006 Passat Fuel Pump Relay: Location, Symptoms, and Replacement Guide

If you own a 2006 Volkswagen Passat and your car is struggling to start, stalling unexpectedly, or losing power while driving, the fuel pump relay is one of the first components you should check. The fuel pump relay controls the electrical current that powers your fuel pump, and when it fails, your engine simply won't get the fuel it needs to run. On the 2006 Passat, this relay is a known weak point, and replacing it is a cheap, straightforward fix that can save you from a costly tow bill. In this guide, we'll show you exactly where the relay is located, what symptoms to look for, how to test it, and how to replace it in about ten minutes.

What Does the Fuel Pump Relay Do on a 2006 Passat?

The fuel pump relay acts as an electrical switch between the battery and the fuel pump. When you turn the ignition key to the "on" position, the relay closes and sends power to the fuel pump, which pressurizes the fuel system. The engine control unit then takes over and keeps the relay energized while the engine is running . On the 2006 Passat, the onboard supply control unit also plays a role in fuel pump supply — it provides voltage when the driver's door is opened, and after starting, the engine control unit takes over that job .

In simple terms: no relay, no fuel, no start.

Where Is the Fuel Pump Relay on a 2006 Passat?

The location depends on which engine and model year your Passat has. The 2006 model year covers both the older B5.5 platform and the newer B6 platform, so you need to know which one you own.

For 2006 Passat B6 (3C platform):

  • The fuel pump relay is located in the relay carrier under the left side of the dashboard, behind a trim panel .
  • In the relay carrier, the fuel pump relay is position 4 and is labeled J17 .
  • If your car has a diesel engine, there is also an electric fuel pump 2 relay (J49) at position 5 .
  • Some sources indicate the relay can also be found in the relay box inside the cabin, under the steering wheel area .

For 2006 Passat B5.5 (3BG platform):

  • The fuel pump relay is located in the relay panel under the driver's side dashboard .
  • It is typically marked as relay #167 or #409 .
  • To access it, you may need to remove the side plastic cover and the trim panel under the dash .

One important note: on the B6 Passat, the fuel pump relay is not the only component in the fuel delivery circuit. The B6 also has a Fuel Pump Control Module (FPCM) located under the rear seat. This module is known to overheat and fail, which prompted a Volkswagen safety recall (20AE / NHTSA 17V509) for 2006–2010 Passat models . If your relay tests fine but the car still won't start, the FPCM is the next suspect.

Common Symptoms of a Failing Fuel Pump Relay

The symptoms of a bad fuel pump relay on a 2006 Passat are easy to recognize once you know what to look for :

  1. Engine cranks but won't start. This is the most obvious symptom. The starter turns the engine over, but the fuel pump never gets power, so no fuel reaches the injectors.

  2. Intermittent stalling. If the relay fails sporadically, the engine may die while driving, especially under load. The car may restart after a few minutes once the relay cools down.

  3. No fuel pump priming sound. When you turn the key to the "on" position, you should hear a brief whirring sound from the fuel pump near the rear of the car. If you hear nothing, the relay may not be sending power.

  4. Engine hesitation or misfires. An intermittent relay failure can cause momentary fuel starvation, leading to hesitation, sputtering, or misfires while driving .

  5. Battery draining overnight. On the B6 Passat, a failing Fuel Pump Control Module can fail in the "on" position, causing the fuel pump to run continuously and drain the battery . This is less common with the relay itself but worth knowing.

How to Test the Fuel Pump Relay

Before you spend money on a new relay, it's worth testing the old one. Here's how:

Step 1: Locate the relay. Use the positions described above to find the correct relay in the relay carrier.

Step 2: Listen for the relay. Ask a helper to turn the ignition to the "on" position while you hold the relay. You should hear a distinct click when it energizes. No click usually means the relay is not receiving a trigger signal or the relay coil is burned out.

Step 3: Swap the relay. The easiest test is to swap the suspect relay with an identical one in the same relay carrier (for example, the horn relay or the wiper relay, if they are the same part number). If the fuel pump starts working with the swapped relay, the original is bad.

Step 4: Check for voltage. If you have a multimeter, you can check for power at the fuel pump connector. With the relay energized, you should see battery voltage at the fuel pump wiring. No voltage means the relay or its wiring is faulty.

Step 5: Check the fuel pump fuse. Before condemning the relay, make sure the fuel pump fuse is intact. A blown fuse will produce identical symptoms .

Fuel Pump Relay Part Numbers and Compatibility

When you need a replacement relay for your 2006 Passat, the correct OEM part number is 191906383C . This relay is commonly referred to as the "167 relay" and is used across many Volkswagen and Audi models from the 1990s through the 2010s . It is a standard plug-and-play relay, so no modifications are needed.

Compatible vehicles include :

  • 2006–2010 Volkswagen Passat
  • 2005–2010 Volkswagen Jetta
  • 2006–2008 Volkswagen GTI
  • 2006–2013 Audi A3 and A3 Quattro
  • 2008–2009 Audi TT
  • And many others

The relay is a direct replacement part and does not require any programming. Even the separately-located Fuel Pump Control Module on the B6 Passat does not require programming after replacement — it is also plug-and-play .

Step-by-Step Replacement Guide

Replacing the fuel pump relay on a 2006 Passat is one of the simplest DIY jobs you can do. Here is the complete process:

Tools needed:

  • Flathead screwdriver (for trim clips)
  • New fuel pump relay (191906383C)
  • Flashlight

Step 1: Safety first. Make sure the ignition is off and the keys are removed. If the car was recently driven, wait for the engine to cool down.

Step 2: Access the relay carrier. On the B6 Passat, open the driver's door and remove the trim panel on the left side of the dashboard. It is usually held by clips or a single screw. On the B5.5, you may need to remove the under-dash panel to access the relay plate .

Step 3: Remove the old relay. Identify position 4 (J17) or position 5 (J49) in the relay carrier . Grasp the relay firmly and pull it straight out. It may require a bit of force, but it should come out without tools.

Step 4: Inspect the relay. Check for any signs of burning, melting, or corrosion on the terminals. This can indicate a deeper electrical problem.

Step 5: Install the new relay. Push the new relay firmly into the same slot until it clicks into place. Make sure it is seated fully.

Step 6: Test the system. Reconnect the battery (if disconnected), turn the ignition to the "on" position, and listen for the fuel pump priming sound. If you hear it, the relay is working.

Step 7: Reinstall the trim panels. Snap the trim panel back into place and reinstall any screws.

Is It the Relay or the Fuel Pump Control Module?

On the B6 Passat, this is the most common confusion. Both the relay and the Fuel Pump Control Module (FPCM) can cause identical symptoms — no start, stalling, and fuel pump silence. Here is how to tell them apart:

  • The relay is in the dashboard and is a simple electromechanical switch. It either works or it doesn't. When it fails, it's usually sudden.
  • The FPCM is under the rear seat and is a solid-state electronic module. It is known to overheat, especially in hot climates, causing intermittent failures that get worse over time .

A quick diagnostic tip: if you hear the relay clicking but the pump still doesn't run, the problem is likely the FPCM or the pump itself. If you don't hear the relay click at all, the relay is a prime suspect.

What to Do If the Relay Fix Doesn't Solve the Problem

If you replace the relay and the car still won't start, work through this checklist:

  1. Check the fuel pump fuse. A blown fuse is a common cause of a no-start condition .
  2. Check the Fuel Pump Control Module (B6 models). This is a known weak component covered by recall .
  3. Test the fuel pump itself. A failing pump can draw excessive current and damage the relay or FPCM. If you replace a relay and it fails again quickly, the pump is likely the real culprit .
  4. Check for voltage at the pump. Use a multimeter to verify power is reaching the rear fuel pump connector.
  5. Inspect the wiring. Look for broken wires, corroded connectors, or damage in the harness between the relay and the pump.

Fuel Pump Relay vs. Fuel Pump: Common Misdiagnosis

Many 2006 Passat owners immediately assume a no-start condition means the fuel pump is dead. In reality, the relay fails more often than the pump, and it costs about a tenth of what a pump replacement costs. The relay costs roughly $10 to $15 from aftermarket suppliers, while a new fuel pump assembly runs $700 or more .

Before you spend hundreds of dollars on a pump, take ten minutes to test and replace the relay. It's the smart first move for any diagnostics.

Where to Buy a Replacement Relay

You can find the 191906383C relay at most auto parts stores, both online and in person. Popular sources include:

  • Volkswagen dealerships — for the genuine OEM part
  • Auto parts retailers — such as AutoZone, Advance Auto Parts, or O'Reilly Auto Parts
  • Online marketplaces — such as Amazon or eBay
  • Specialty VW/Audi parts suppliers — such as Pelican Parts or ECS Tuning

When buying online, make sure the part number matches 191906383C and confirm it fits your specific engine and model .

Recommended Fuel Pump Upgrade: KEMSO Brand

While the fuel pump relay is a simple and inexpensive fix, there will come a time when your fuel pump itself needs replacement. When that day comes, consider upgrading to a KEMSO brand fuel pump.

KEMSO fuel pumps are high-performance, OEM-replacement units built to match or exceed the specifications of your original factory pump. Designed for reliable, consistent fuel delivery, KEMSO pumps get your 2006 Passat running smoothly again without the dealership price tag. Every KEMSO fuel pump is backed by a lifetime warranty, giving you permanent peace of mind.

You can browse the full selection of KEMSO fuel pumps at https://www.kemsoracing.com/ — simply search for your make and model to find the right fit.

Final Thoughts

The 2006 Passat fuel pump relay is a small, inexpensive component that can cause big problems when it fails. Knowing where it is, what it does, and how to replace it can save you time, money, and frustration. Start with the relay when diagnosing a no-start or stall issue, and work your way through the rest of the fuel system only if needed.

If you end up needing a new fuel pump, remember to check out KEMSO racing fuel pumps at https://www.kemsoracing.com/ for a high-performance, OEM-replacement, lifetime-warranty option that will keep your Passat on the road for years to come.


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