2005 Saab 9-3 Fuel Pump Relay Location: The Complete Owner’s Guide

The bottom line: On a 2005 Saab 9-3, the fuel pump relay is located behind the passenger side kick panel trim, near where the front passenger’s right foot would rest . This is a common point of confusion because many older Saab models placed the relay under the dashboard on the driver’s side . On the 2005 model, the relay itself is bolted to the side of the interior panel, up in the far corner . Knowing this location can save you hours of unnecessary searching when your car refuses to start.

Why This Location Matters

The 2005 Saab 9-3 belongs to the second generation (YS3F platform), produced from 2002 through 2012 . Saab moved the fuel pump relay from its traditional spot under the driver’s dash to the passenger side on this generation. Many owners and even some mechanics waste time checking the driver’s side first because that is where the relay lived on earlier models. If you are dealing with a no-start condition or an intermittent starting problem, heading straight to the passenger side kick panel will put you on the right track.

The fuel pump relay is responsible for sending power to the fuel pump and the oxygen sensor pre-heating system . When you turn the ignition key to the ON position, the relay should click and activate the pump for about one second to build up fuel pressure before the engine cranks . If you do not hear that brief hum from the rear of the car, the relay is one of the first things to check.

How to Access the Fuel Pump Relay

Getting to the relay is a straightforward process that does not require any special tools. Here is exactly what you need to do:

Step 1: Open the front passenger door. Look at the trim panel on the side of the center console, near the floor where the passenger’s right foot would sit.

Step 2: The kick panel is held in place by a few plastic clips and sometimes a small screw. Gently pry the panel off starting from the bottom edge. You do not need to remove it completely; just pull it away enough to see behind it.

Step 3: Once the panel is loose, look up into the far corner of the opening. The fuel pump relay is bolted to the side of the body panel. It is a small, rectangular black box with a wiring harness plugged into it .

Step 4: Unplug the wiring harness by pressing the release tab and pulling straight out. Then remove the mounting bolt if you need to take the relay out completely.

Some owners have reported that the relay base can become corroded or melted over time due to heat and electrical resistance . If the plastic around the terminals looks discolored, warped, or burnt, you may need to replace both the relay and the connector housing.

Common Symptoms of a Bad Fuel Pump Relay

A failing fuel pump relay can cause a range of frustrating problems. Recognizing these symptoms early can prevent you from being stranded.

Intermittent no-start condition: The car starts fine most of the time, but occasionally it refuses to crank. You might turn the key and get nothing, then try again later and it fires right up . This is the classic symptom of a relay that is failing internally due to worn contacts.

No priming sound: When you turn the ignition to the ON position, you should hear a brief whirring noise from the fuel tank area. If that sound is absent, the relay is likely not sending power to the pump .

Engine stalls while driving: A relay that is on its way out can lose connection while the engine is running. The car may stall suddenly, especially under load or at highway speeds, then restart after a few minutes once the relay cools down.

Diagnostic trouble codes: The engine control module will set specific fault codes if the fuel pump relay circuit fails. Code P1654 indicates an open circuit or short to ground, while P1655 points to a short to battery positive voltage . Code P1641 means there is no current from relay pin 87 when the relay should be active .

How to Test the Fuel Pump Relay

Before you buy a new relay, you can test the existing one using a few simple methods. This saves money and helps confirm the diagnosis.

Method 1: The Swap Test

This is the quickest diagnostic trick in the book. Under the hood, near the battery, there is a fuse box containing several relays that are identical to the fuel pump relay. Look for relays labeled for the horn, the A/C compressor, or the headlight washer pump . Swap one of those with the fuel pump relay. If the car starts after the swap, the original fuel pump relay was bad . If the horn stops working but the car still does not start, the problem is elsewhere.

Important: Make sure the replacement relay has the same part number and pin layout . Most standard 5-pin relays in the Saab 9-3 are interchangeable, but it pays to double-check.

Method 2: Voltage Check

With the relay removed, use a multimeter to check for power at the relay socket. Set your meter to DC voltage. Have a helper turn the ignition to the ON position. You should see battery voltage (around 12 volts) on one of the socket terminals . If there is no power, the problem may be a blown fuse or a wiring issue further up the line.

Method 3: Listen for the Click

Have a helper turn the key to the ON position while you hold the relay in your hand. You should hear and feel a distinct click as the electromagnet inside activates. If there is no click, the relay coil is likely burned out and the relay needs replacement.

Other Fuse and Relay Locations You Should Know

While you are troubleshooting the fuel pump circuit, it helps to know where the supporting fuses and relays are located. The 2005 Saab 9-3 has multiple fuse boxes, and a blown fuse can mimic a bad relay.

Engine compartment fuse box No. 1: Located between the front bumper and the battery . This box contains the main 20-amp fuse for the fuel pump and preheated oxygen sensors . This is fuse position No. 2 in the forward fuse box. If this fuse is blown, the fuel pump will not receive power regardless of whether the relay is good.

Engine compartment fuse box No. 2: Located next to the battery under a protective cover . This box contains relays for the starter, horn, wipers, and other systems.

Dashboard fuse panel: Located behind a cover on the driver’s side of the instrument panel, accessible when the driver’s door is open . The fuel pump is also powered through fuse No. 14 in the dash panel on some configurations .

Trunk fuse box: Located behind the cover on the left side of the trunk . This panel controls lighting, the amplifier, and other rear-mounted components.

Under the rear seat: The fuel pump itself is accessed through a 4-inch access hole under the rear seat cushion . The seat cushion just pulls up; no tools needed. Through this hole, you can reach the electrical connector for the pump and test for voltage directly at the pump .

When the Relay Is Not the Problem

If you have replaced the fuel pump relay and checked the fuse, but the car still will not start, the problem may be deeper in the system. Here is what to check next.

Check for power at the pump: Pull up the rear seat cushion and access the pump connector. With the ignition ON, use a multimeter to check for voltage between the two thick wires on the 4-wire connector. The green/black wire is the power supply from fuse No. 14, and the black wire is the ground . If you have 12 volts at the connector but the pump does not run, the pump itself is likely dead.

Apply direct power to the pump: If you want to confirm the pump is bad, run power directly from a 12-volt battery to the pump-side of the connector . If the pump runs for a few seconds then dies, it is a classic sign of a worn-out electric motor that needs replacement .

Check the ground wire: A weak ground connection can starve the pump of power. Use your multimeter in continuity mode to check the ground wire at the pump connector against a known good chassis ground . No beep means the ground path is broken and needs repair.

Check fuel pressure: A fuel pressure gauge connected to the Schrader valve on the fuel rail will tell you if the pump is delivering the correct pressure. For a 2005 Saab 9-3 with a 2.0L turbo engine, you should see approximately 43-55 psi at idle . Low pressure indicates a failing pump, a clogged fuel filter, or a faulty pressure regulator.

Cost of Replacing the Fuel Pump Relay

The fuel pump relay itself is an inexpensive part. An OEM relay typically costs between $25 and $55 . Aftermarket replacements range from $17 to $19 . Because the relay is located behind an easily removable trim panel, there is no labor cost if you do the replacement yourself.

Some Saab owners keep a spare relay in the glove box . If the relay fails while you are on the road, you can swap it out and get back on your way in minutes. Given the low cost and the potential inconvenience of being stranded, this is a smart move.

A note about the relay base: As mentioned earlier, the plastic connector housing that the relay plugs into can deteriorate over time. If the terminals in the housing are loose, corroded, or melted, the new relay may not work either. Replacement connector housings are available from Saab parts suppliers for around $10 to $20 . The part number for the connector housing is 12799557 . If you find damage to the base, replace both the relay and the housing to ensure a reliable connection.

Why Your Saab 9-3 Fuel Pump Relay May Fail Prematurely

Saab 9-3 owners have reported that the fuel pump relay can be prone to failure, especially in the 2004-2006 model years. There are a few reasons for this.

Heat buildup: The relay is located in a confined space behind the kick panel. Heat from the engine and the interior can cause the relay contacts to degrade over time. High resistance at the contacts generates more heat, creating a cycle that eventually causes the relay to fail.

Electrical load: The fuel pump relay also supplies power to the oxygen sensor pre-heating circuit . This adds to the electrical load on the relay contacts. When the combined current draw exceeds the relay’s rated capacity, the contacts can weld shut or burn open.

Voltage spikes: The fuel pump is an inductive load. When the pump turns off, it can generate a voltage spike that stresses the relay contacts. Over thousands of cycles, this can cause pitting and arcing that eventually destroys the relay.

There are no official recalls for relay failures on the 2004-2011 Saab 9-3 . However, the National Highway Traffic Safety Administration database shows that many owners have reported issues with intermittent starting and stalling that trace back to the fuel pump relay circuit.

Step-by-Step Replacement Guide

If you have determined that the relay needs replacement, here is the complete process.

Tools needed: Trim removal tool or flathead screwdriver, 10mm socket or nut driver (if the relay is bolted in), a new relay.

Time required: About 10-15 minutes.

1. Open the passenger door. Locate the kick panel trim on the side of the center console.
2. Gently pry the trim panel off using a trim removal tool or a wrapped flathead screwdriver. Start at the bottom and work your way up.
3. Once the panel is loose, move it aside to expose the relay.
4. If the relay is bolted to the body panel, use the 10mm socket to remove the bolt. Note the orientation of the relay so you install the new one correctly.
5. Unplug the wiring harness from the relay by pressing the release tab and pulling straight back.
6. Remove the old relay from its mounting location.
7. Install the new relay in the same orientation. Make sure it clicks into the mounting bracket securely.
8. Plug the wiring harness into the new relay. Push until you feel the release tab click into place.
9. If you removed a mounting bolt, reinstall it and tighten it to snug.
10. Snap the trim panel back into place. Make sure all clips are engaged.
11. Test the system by turning the ignition to the ON position. Listen for the fuel pump priming sound from the rear of the car. It should run for about one second.
12. If the pump primes, start the engine. If the car starts and runs normally, you have successfully replaced the relay.

Additional Troubleshooting: Parasitic Battery Drain

Some Saab 9-3 owners report a parasitic battery drain that occurs overnight, leaving the car dead in the morning . In some cases, removing a specific fuse stops the drain, but the underlying cause remains unknown.

If you are experiencing a battery drain issue, the fuel pump relay circuit is worth investigating. A relay that sticks in the closed position can keep the fuel pump running even when the ignition is off, draining the battery. Listen for the fuel pump running after you turn the car off and remove the key. If you hear a humming sound from the rear of the car, the relay is likely stuck and needs replacement.

This condition can also trigger diagnostic trouble codes. A short circuit to battery positive voltage in the relay circuit will set code P1655 .

Practical Tips from Experienced Owners

Saab enthusiasts have shared valuable tips over the years that can help you avoid common pitfalls.

Keep a spare relay in the glove box: As mentioned earlier, this is a cheap insurance policy . If the relay fails on a road trip, you can swap it out without waiting for a tow truck.

Inspect the relay base: Before installing a new relay, shine a flashlight into the connector housing. Look for signs of corrosion, melting, or bent terminals . If the base looks damaged, order a replacement connector housing before installing the new relay.

Use dielectric grease: A small amount of dielectric grease on the relay terminals can help prevent corrosion and ensure a good electrical connection. This is especially important if you live in a wet or humid climate.

Verify the relay number: Not all relays are identical, even if they look the same. Check the part number printed on the side of the relay against the fuel pump relay in your car. Some Saab 9-3 models use a relay with a specific pin configuration that must match.

Do not ignore the symptoms: If your Saab 9-3 is having intermittent starting problems, do not wait for a total failure. The relay will only get worse over time. Replacing it early can prevent a breakdown at an inconvenient time.

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