Ameer Randolph
The cost of a fuel pump relay replacement varies depending on the vehicle and the location. The part itself typically costs between $15 and $20, while labour costs can range from $41 to $61. The total cost of replacement is estimated to be between $84 and $103 on average, but some dealerships may charge significantly more. It is important to note that diagnosing a faulty fuel pump relay can be simple, and testing it can be done by technicians using a test light or a multimeter.
| Characteristics | Values |
|---|---|
| Average Cost | $84-$103 |
| Labor Cost | $41-$61 |
| Parts Cost | $43 |
| Dealership Cost | $15-$20 |
| Repair Shop Cost | Under $100 |
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What You'll Learn
Fuel pump relay replacement costs
The fuel pump relay is a small but important component of a vehicle's ignition system. It is a black plastic component, set in a small box with a wiring harness attached to its underside. The fuel pump relay works only when the ignition is turned on or off; it sends an electric current to the fuel pump, which then sends gasoline to the engine, allowing the car to start running.
The fuel pump relay is located in the engine compartment, attached to the multi-use bracket on the upper dash panel extension, or under the hood, or under the dashboard near the steering wheel. The coil and contact points of the fuel pump relay are susceptible to damage, and the relay itself can also be prone to oxidation or rust. A malfunctioning fuel pump relay can conduct too much power to the fuel pump, causing it to be damaged or ruined.
Due to the risk of damage to the fuel pump, it is recommended to keep the fuel pump relay in perfect working order. The fuel pump relay should be checked by a mechanic every time the brakes are changed. If the relay is faulty, it should be replaced, not repaired, as there is generally nothing serviceable in a relay, and attempts to repair it can lead to humidity entering the relay, causing it to malfunction, or even melt.
The cost of replacing a fuel pump relay typically includes the cost of the part and a minimum of one hour's worth of labour from a mechanic. The part itself usually costs around $25, while the labour can vary depending on the mechanic and the complexity of the job. Some mechanics may charge under $100 for the job, while others may charge a higher hourly rate.
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Testing fuel pump relays
The cost of a fuel pump relay replacement ranges from $84 to $103 on average, while labor costs are estimated to be between $41 and $61, and parts typically cost around $43. However, the relay itself is a relatively inexpensive part, priced between $15 and $20 at dealerships.
Now, if you're experiencing issues with your fuel pump, such as unusual noises or failure to start the engine, you can perform a few tests to diagnose whether the fuel pump relay is faulty. Here's a detailed guide on testing fuel pump relays:
Locate the Fuel Pump Relay:
The fuel pump relay is typically found in the vehicle's fuse box, which is usually located underneath the hood near the front of the vehicle. Alternatively, there may be a smaller fuse box under the steering column. Remove the cover of the fuse box and refer to the diagram to identify the fuel pump relay, which is often colored green or gray.
Remove the Fuel Pump Relay:
Firmly grip the relay on both sides and pull it straight up and out from the terminals of the fuse box. If it doesn't come out easily, try rocking it gently back and forth to loosen the connection. Ensure that your vehicle is turned off before removing the relay, as it connects to the electrical system.
Clean and Inspect the Relay:
Hold the relay upside down, so the prongs are pointing up. Use a wire brush to scrape any corrosion or rust from the prongs. Clean the terminal ports on the fuse box as well. If necessary, use a damp cloth with an electrical contact cleaner for more thorough cleaning.
Test with a Multimeter:
Refer to the circuit diagram on the relay to identify the correct prongs for power and multimeter connections. Look for two points with a box in between them on the diagram. Attach the multimeter to a ground and set the voltage to 12V to test the ground, then switch to resistance mode. This test will help determine if the relay is faulty.
Test with a Relay Tester:
A relay tester can be used to prevent probe spread on terminals. Connect a multimeter and/or test light to the relay tester to examine the circuit. Ensure the vehicle is turned off during this process.
Swap with Another Relay:
Try swapping the fuel pump relay with another relay of the same type and number. If your vehicle starts and runs normally with the swapped relay, it confirms the need for a new fuel pump relay.
Check Service Information:
Check your computer for service information related to any fault codes you may have encountered. Look for technical service bulletins (TSBs) from the manufacturer, which can provide insights into problems specific to your vehicle.
Secondary Test for Resistance:
Even if the relay clicks during the initial test, perform a secondary test to measure the resistance across the relay. Compare this resistance reading to the data in the service manual or the relay itself. If the resistance is too high, the relay must be replaced.
It is important to note that you should never attempt to repair a relay. If it is proven faulty, dispose of it and install a new, identical relay, ensuring complete contact with the terminals on your vehicle.
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Symptoms of a bad fuel pump relay
The cost of a fuel pump relay replacement ranges from $84 to $103 on average, with labour costs estimated to be between $41 and $61, and parts priced around $43. The price of the relay itself can vary, with some dealerships charging $15-$20, while others charge significantly more.
Now, onto the symptoms of a bad fuel pump relay:
A faulty fuel pump relay will usually manifest in one of two ways: either the device won't power on at all, or it will get stuck in the 'on' position. One of the most common symptoms of a bad fuel pump relay is that your vehicle won't start, and it appears to be out of gas. However, the starter may continue cranking for 10 seconds or more, even if you push the start button a second time or try to turn the key off. Jump-starting your vehicle may temporarily resolve this issue, as fuel pump relays perform better at higher voltages.
You may also notice problems with other components of your vehicle that are controlled by double relays, such as the front and rear windshield wipers, door locks, washer fluid, horn, and backup lights. For example, your windshield wipers might not turn on at all, or they may only work on a low speed. These issues usually occur in pairs, so if you experience the loss of two functions simultaneously, it could indicate a failed double relay.
Diagnosing a relay is a straightforward process. You can test the relay by applying power and ground to the small circuit with the proper polarity, which should make the relay click. The next step is to measure the resistance across the relay and compare it to the data in the service manual or on the relay itself. If the relay does not click or shows infinite resistance, it needs to be replaced.
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DIY fuel pump relay replacement
The cost of replacing a fuel pump relay typically ranges from $80 to $300 at a professional repair shop. The price can vary depending on factors such as vehicle type, labour rates in your area, and the type of parts used. Labour costs can range from $41 to $61, while parts can cost around $43.
If you feel confident in your basic car maintenance skills and have verified that the relay location is accessible, you may consider replacing the fuel pump relay yourself. Here is a step-by-step guide on how to do it:
Step 1: Locate the Fuel Pump Relay
Identify the correct fuse box containing the fuel pump relay by consulting your vehicle's owner's manual or reliable online sources/repair manuals specific to your vehicle's make and model.
Step 2: Identify the Specific Relay
The fuel pump relay is typically labelled with abbreviations such as "FP", "Fuel", "Pump", or "EUP" (Electronic Unit Pump) for diesel engines. It may also be shown on a diagram on the fuse box lid or in the owner's manual.
Step 3: Remove the Old Relay
Ensure that the ignition is turned off. Pull the old relay straight out of its socket. It is important to get an exact match for the new relay, so take the old one with you when purchasing a replacement.
Step 4: Insert the New Relay
Firmly insert the new relay into the same socket, making sure that the pins match and are oriented correctly.
Testing and Troubleshooting
Before replacing the relay, it is important to properly diagnose the issue. Incorrect diagnoses and relay specifications can waste time and money, and even damage your vehicle's electrical system. If the relay is proven good but still does not function, you can test the terminals in the junction block with a test light or a multimeter. A multimeter is preferred for its accuracy, but a test light will indicate whether power is present or not.
Additionally, consider re-wiring the fuel pump to ensure it receives a clean voltage that won't fluctuate with other electrical conditions in the car. This can be done by following these steps:
- Locate the 12v supply wire from the ECU to the fuel pump and cut it.
- Wire pin 85 of the relay to the 12v supply wire from the ECU.
- Run a dedicated wire from your battery to pin 30 on the relay.
- Run a wire from pin 87 to the factory wire that was cut, which runs to the fuel pump.
By performing this modification, you ensure that the fuel pump receives a consistent 14 volts when in use, improving its efficiency.
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Labour costs
The cost of labour for replacing a fuel pump relay varies depending on the source of information. According to RepairPal, labour costs are estimated to be between $41 and $61. This estimate does not include taxes and fees and may differ based on location.
In contrast, a user on the VW Vortex forum reported being quoted $260 for labour to replace the fuel pump relay at a dealership. However, other forum users suggested that this price seemed excessive and recommended seeking a second opinion from another shop or a trusted local mechanic, who may offer lower prices for the same or better service.
Another forum user on JustAnswer mentioned that the cost of labour for replacing a fuel pump relay at a repair shop should typically be under $100, depending on the diagnostic time involved.
It is worth noting that replacing a fuel pump relay is generally considered a straightforward DIY project that can be tackled at home with the help of readily available resources and guidance from online forums and vehicle owner's manuals. This can help vehicle owners avoid labour costs altogether.
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Frequently asked questions
A fuel pump relay typically costs between $15 and $20, but the price can vary.
Labour costs for replacing a fuel pump relay are estimated to be between $41 and $61.
The total cost of replacing a fuel pump relay is estimated to be between $84 and $103 on average, including parts and labour.
You can take your car to a repair shop or dealership to get your fuel pump relay replaced, or you can replace it yourself as it is generally a DIY-friendly repair.
A faulty fuel pump relay can cause various issues with your vehicle, including difficulty starting, poor engine performance, stalling, and poor fuel efficiency. The Check Engine Light (CEL) may also come on, indicating a problem.
