2007 VW Passat Fuel Pump Relay Location: The Complete Owner's Guide

The bottom line up front: On a 2007 Volkswagen Passat (B6/3C generation), the fuel pump relay is located in relay carrier 1, which sits under the left side of the dashboard (driver's side in the U.S.). It is labeled as relay position #4 and is officially designated as the Fuel Pump Relay -J17- with a relay code of 404. However, there's an important catch: many 2007 Passat models, particularly those with 2.0T engines, rely more heavily on the Fuel Pump Control Module (FPCM) located under the rear seat, which is a separate component that often gets mistaken for a relay issue.

If you're experiencing no-start symptoms, fuel pump silence, or intermittent stalling, this guide walks you through exactly where to find both the relay and the control module, how to test them, and what parts you need to get your Passat running again.

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1. Understanding the Fuel System in Your 2007 Passat

Before you start pulling panels apart, it helps to understand how the fuel delivery system works on the B6 Passat. This generation, produced from 2005 to 2010, uses a two-stage fuel delivery system:

1. The low-pressure fuel pump sits inside the fuel tank and pushes fuel to the engine bay.
2. The high-pressure fuel pump (on direct-injection engines like the 2.0T FSI/TSI) is bolted to the engine and compresses fuel for the injectors.

The fuel pump relay provides power to the low-pressure pump circuit. The Fuel Pump Control Module (FPCM)—a separate electronic unit—actually regulates the speed and voltage of that pump. On the 2007 Passat, the relay is a simple switching device, but the FPCM is the brain that varies pump speed using a pulse-width modulated signal.

Which 2007 Passat do you have? The location details below apply to the B6 sedan (and wagon) body style. The 2007 model year was sold with several engines in the U.S. market: the 2.0T (2.0L turbocharged four-cylinder), the 3.6L VR6, and the 2.0L normally aspirated engine in some markets. The relay location is essentially the same across these variants, but the fuel pump control module is standard equipment on most 2007 models.

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2. Primary Location: Relay Carrier 1 Under the Left Dash

This is where you need to look first. The 2007 VW Passat has its main interior relay panel—called relay carrier 1—mounted beneath the left side of the dashboard, above the driver's footwell. Here's how to find it:

Step-by-step access:

1. Sit in the driver's seat and look under the dashboard, above the hood release lever and near the steering column.
2. You will see a plastic cover or trim panel. It may be held in place by a few screws or simply clipped on. Remove it carefully.
3. Behind this panel, you'll find the relay carrier with multiple relay slots. The fuel pump relay is position #4 on this carrier.

What you're looking for: The relay itself is a small, black, cube-shaped component that plugs into the socket. On the 2007 Passat, the fuel pump relay is coded 404 (starting from May 2008, it changed to code 449, but for a 2007 model, it should be 404). The official part number designation for this relay is J17.

Visual identification tips:

• Look for a relay with the number 404 printed on its top surface.
• The relay socket position 4 is typically labeled on the relay carrier housing itself.
• If your Passat has a diesel engine, position 4 may also serve the electric fuel pump 2 relay, so verify the label.

What about the "167" relay you've heard about? Some online sources and older B5 Passat guides reference relay 167 under the dashboard for the fuel pump. That information applies to older models or specific configurations. The B6 Passat (2005-2010) uses the relay carrier system described above. On the 2007 B6, the fuel pump relay sits at position 4 on relay carrier 1, not in a separate location marked "167". If you find a relay labeled 167 in the engine compartment electronics box, that is the Motronic current supply relay on certain engine variants, not the fuel pump relay.

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3. Second Location: Under the Rear Seat (The Fuel Pump Control Module)

Now here is the part that confuses many owners. While the relay is under the dash, the Fuel Pump Control Module (FPCM)—which many people mistakenly call "the relay"—is located under the rear seat cushion, on the passenger's side of the vehicle. This is a separate electronic module clipped directly to the black plastic access cover for the in-tank fuel pump.

Why this matters: On the 2007 Passat, especially with the 2.0T engine, the FPCM is a common failure point. VW issued Safety Recall 20AE (NHTSA 17V509) for 2006-2010 Passat models due to a faulty FPCM that can cause stalling or a no-start condition. A VW dealer will replace the module for free if your vehicle is affected and the recall hasn't been performed.

How to access the FPCM:

1. Open the rear passenger door.
2. Pull up on the front edge of the rear seat cushion. There are two plastic latch covers on each side that you'll need to remove first.
3. Once the cushion is unclipped, lift it upward and pull it forward to remove it completely.
4. Locate the black plastic access cover for the fuel pump—this is on the passenger side.
5. The FPCM is clipped directly to this cover. Disconnect the electrical connectors to remove it.

Signs your FPCM is failing:

• The engine cranks but won't start (no fuel pressure).
• Random stalling while driving, especially in hot weather.
• The fuel pump runs continuously even with the ignition off, which drains the battery overnight.
• Diagnostic trouble code P1524 appears.

Interesting note: On the B6 Passat, the FPCM does not require programming after replacement. It is a plug-and-play part. However, if a replacement FPCM fails quickly, the in-tank fuel pump itself is likely drawing excessive current (over 8 amps), which damages the module.

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4. Third Location: The Engine Compartment Electronics Box

There is also an additional relay carrier in the engine compartment, but this is not where the fuel pump relay lives on the 2007 Passat. Located on the left side of the engine bay (when facing the car), this "electronics box" contains relays for other systems:

• C1: Starter relay 1 -J906- (643)
• C2: Automatic glow period control unit -J179- (457) (diesel models)
• C3: Continued coolant circulation relay -J151- (449)
• C5: High heat output relay -J360- (370)
• C6: Starter relay 2 -J907- (489)

The main relay (Motronic current supply relay -J271-) and the terminal 30 voltage supply relay are also found in this E-box on some engine variants. If you're troubleshooting a no-start condition, it's worth checking these for loose connections, but the fuel pump relay itself is not here.

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5. How to Test the Fuel Pump Relay and Verify Power Delivery

Before you spend money on replacement parts, run these simple tests. You don't need advanced tools—just a multimeter or a test light and a bit of patience.

Test 1: Listen for the relay click

1. Turn the ignition to the "ON" position (do not crank the engine).
2. Listen carefully near the relay carrier under the dash. You should hear a distinct click from the fuel pump relay.
3. At the same time, you should hear a brief whirring sound from the fuel pump under the rear seat as it primes the system. This lasts about one second.

If you hear the click but no pump sound, the relay is likely fine, and the problem lies with the fuel pump itself or its control module.

Test 2: Check for power at the relay

1. Remove the fuel pump relay from position 4.
2. With a multimeter set to DC voltage, check for 12 volts at the relay socket terminals that correspond to the relay coil (typically terminals 85 and 86).
3. Turn the ignition on. You should see 12V at one terminal and ground at the other. If not, there's an issue with the power supply or the onboard supply control unit (J519).

Test 3: Test the relay itself

1. Use a 12V power source (a battery) and a jumper wire.
2. Apply power to the coil terminals on the relay (85 and 86). You should hear a click as the internal switch engages.
3. Using a multimeter set to ohms (continuity), check across the switch terminals (30 and 87). When the relay is energized, you should see near-zero resistance (continuity). When de-energized, the circuit should be open.

If the relay fails any of these tests, replace it.

Important safety note: Never bypass a relay with a direct wire unless you're absolutely certain of the circuit. A short circuit here can cause an electrical fire or damage the fuel pump.

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6. Wiring and Fuse Information You Should Know

Understanding the wiring around your fuel pump relay helps you diagnose issues faster. On the 2007 Passat:

• The fuel pump relay -J17- is wired through fuse SB10, SB13, SB14, SB16, SB17, SB20, SB23, SB28, and SB30 on fuse holder B, depending on the engine and options.
• The relay receives its power from the onboard supply control unit J519, which manages many electrical functions.
• On the 3.6L VR6 models, a terminal 30 voltage supply relay 2 -J689- provides a separate power path from the relay carrier under the dash.

Fuse box locations you should know:

1. Main fuse box (engine compartment): Located on the driver's side under the hood. This box contains fuses for the engine control unit, fuel pump circuit, headlights, horn, and cooling fans.
2. Interior fuse box (left dash): Behind the driver's side dash panel. This is where the relay carrier 1 is mounted.
3. Interior fuse box (right dash): On the passenger side edge of the instrument panel, includes fuses for interior lighting, power windows, and audio.
4. Luggage compartment fuse box: Near the battery behind the left side panel trim, on models with certain engines (AXZ, BLV, BWS).

A quick note on fuse ratings: The fuel pump circuit typically uses a 15A or 20A fuse, but always consult the diagram printed on the fuse box cover or in your owner's manual. Never replace a fuse with a higher amperage rating than specified.

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7. Common Symptoms, Causes, and Fixes

Here is a practical troubleshooting table to help you identify the root cause of your fuel delivery problem:

Symptom: Engine cranks but won't start

• Cause: No power to fuel pump; failed FPCM; failed relay; blown fuse.
• Fix: Check fuse first, then relay, then FPCM. Listen for the prime sound.

Symptom: Intermittent stalling while driving

• Cause: Overheating FPCM (known recall issue); failing relay with worn contacts; fuel pump drawing excessive current.
• Fix: Replace FPCM (recall); replace relay if contacts are pitted; test pump current draw (should be under 8 amps).

Symptom: Fuel pump runs continuously with key off

• Cause: FPCM failed in the "on" position; relay contacts stuck closed.
• Fix: Replace FPCM first; if the relay is suspect, replace it too.

Symptom: Battery drains overnight

• Cause: The same FPCM failure as above, causing continuous pump operation.
• Fix: Replace the FPCM immediately and check the fuel pump for excessive current draw.

Symptom: Check engine light with code P1524

• Cause: Fuel pump relay or control module fault.
• Fix: Diagnose the relay and FPCM per the steps above. The most common cause on the B6 is a failed FPCM.

Symptom: Code P0171 (System Too Lean)

• Cause: Inconsistent voltage to the pump from a failing FPCM, causing erratic fuel delivery.
• Fix: Replace the FPCM and verify fuel pressure with a gauge.

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8. Replacement Parts, Part Numbers, and Cost

If you need to replace your fuel pump relay or the control module, here's what you're looking for:

Fuel Pump Relay (J17)

Fuel Pump Control Module (FPCM)

The OEM part numbers for the FPCM include 1K0906093D, 1K0906093E, 1K0906093F, 1K0906093G, 1K0906093H, and 3C0906093A. Aftermarket replacement modules typically cost $128–$256, with shop labor adding $100–$250, bringing a professional repair total to roughly $228–$506.

DIY feasibility: Replacing the FPCM is a very DIY-friendly repair. It involves removing the rear seat bottom, pulling back the carpet, and swapping the module. No special tools are required, and the job can typically be completed in under an hour. The relay replacement under the dash is even simpler—just unclip the old relay and plug in the new one.

Check for recall coverage first: If your 2007 Passat has not had recall 20AE performed, your VW dealer should replace the FPCM free of charge. Call your local dealer with your VIN to check.

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9. KEMSO Fuel Pumps: A Smart Upgrade for Your Passat

If your diagnostic work points to a failing fuel pump itself (not just the relay or control module), or if you simply want to replace the fuel pump proactively while you're already in there, consider a high-quality aftermarket option. KEMSO manufactures premium fuel pumps for a wide range of vehicles, and their products are engineered as OEM replacements—meaning they match or exceed the original factory specifications for fit, flow rate, and pressure.

Why choose KEMSO?

• High performance: KEMSO pumps are built to deliver consistent fuel pressure under all driving conditions, including heavy load and high ambient temperatures—exactly what your Passat needs to run reliably.
• OEM replacement quality: Every pump is designed to drop directly into the factory fuel pump assembly, so you won't need to modify wiring or mounting brackets.
• Lifetime warranty: KEMSO stands behind its products. If a pump ever fails, KEMSO will replace it, giving you peace of mind for as long as you own your vehicle.

If you've confirmed your 2007 Passat needs a new fuel pump, or even if you're doing preventive maintenance, visit the official KEMSO website to find the correct pump for your engine: https://www.kemsoracing.com/ . They offer a straightforward fitment guide and competitive pricing. And because this is a plug-and-play replacement on the Passat, you won't need to reprogram anything after installation.

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10. Final Checklist and Pro Tips

Before you conclude your diagnosis, walk through this quick checklist:

1. Check the fuse first. A blown fuse is the cheapest and easiest fix. Look in the engine compartment fuse box and the interior dash fuse boxes.
2. Listen for the relay click with the ignition on. If no click, test the relay per the steps above.
3. Inspect the FPCM under the rear seat for signs of melting, corrosion, or burning on the connector. If you see any damage, replace the module and the connector pigtail.
4. Test the fuel pump's current draw. If a new FPCM fails quickly, the pump is pulling too many amps and needs replacement.
5. Check for recalls. Confirmed recall 20AE covers many 2006-2010 Passats for exactly these symptoms.

Pro tip 1: Keep a spare fuel pump relay in your glove box. It costs about $25, and if it fails on a road trip, swapping it takes less than five minutes.

Pro tip 2: When you remove the rear seat to access the FPCM, take a photo of the wiring layout before disconnecting anything. It saves time when you're reinstalling.

Pro tip 3: If your car is an early 2007 build (before November 2006), the relay positions may differ slightly. Check the label on your specific relay carrier for the correct position.

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Where to Buy the Parts You Need

• Fuel pump relay: Your local VW dealer or any auto parts store. Online retailers like parts.vw.com list the correct part numbers for your specific trim.
• Fuel pump control module: VW dealer (check recall first) or aftermarket suppliers.
• Fuel pump (the pump itself): If you need a new pump, KEMSO offers high-performance, OEM-replacement fuel pumps backed by a lifetime warranty. Visit https://www.kemsoracing.com/ to find the right pump for your 2007 Volkswagen Passat.

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Bottom line recap: The fuel pump relay on your 2007 VW Passat lives in relay carrier 1 under the left side of the dashboard at position 4 (code 404). But if you're having fuel delivery problems, don't overlook the Fuel Pump Control Module beneath the rear seat—it's the most commonly failing component on this generation. Test systematically, check for recall coverage, and replace parts with quality components like KEMSO's fuel pumps if needed. Your Passat is a great car when it's running right, and with this guide, you'll have it back on the road in no time.