🔧 BRZ - Fuel Pump Replacement

The fuel pump on your BRZ sits inside the fuel tank and is accessed from inside the cabin under the rear seat. The job is mostly about working cleanly, relieving fuel pressure first, and resealing the tank opening so it doesn’t leak or smell like fuel.

Difficulty Level: Intermediate | Estimated Time: 1.5-3.0 hours

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⚠️ Safety & Precautions

• ⚠️ Work outside or in a very well-ventilated area; fuel vapors are flammable.
• ⚠️ No smoking, flames, heaters, or grinding/sparks anywhere nearby.
• ⚠️ Relieve fuel pressure before disconnecting lines to avoid spray.
• ⚠️ Disconnect the 12V battery negative terminal to prevent accidental sparks.
• ⚠️ Keep a fire extinguisher rated for fuel fires nearby.
• ⚠️ Keep dirt out of the tank; contamination can damage the new pump.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 3/8" ratchet
• 3" extension for 3/8" ratchet
• Torque wrench (5–30 Nm range)
• Phillips screwdriver #2
• Trim clip removal tool
• Needle-nose pliers
• Fuel line disconnect pick set
• Brass punch and small hammer
• Fuel pump lock ring tool (specialty)
• Shop towels
• Catch pan
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel pump module assembly - Qty: 1
• Fuel pump tank seal (O-ring/gasket) - Qty: 1
• Fuel pump strainer (sock filter) - Qty: 1
• Fuel pump lock ring - Qty: 1 (recommended)

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📋 Before You Begin

• Park your BRZ on level ground and set the parking brake.
• Lower the fuel level if possible (under 1/4 tank is easier and less messy).
• Open the fuel door and loosen the gas cap to reduce tank vapor pressure.
• Have a place ready to set the pump module down (clean towel on a tray).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve fuel pressure

• Open the hood and use a 10mm socket to disconnect the battery negative terminal. Torque to 5 Nm (44 in-lbs) on reassembly.
• Remove the fuel pump fuse/relay from the under-hood fuse box (use your owner’s manual diagram).
• Start the engine and let it run until it stalls. Crank for 2–3 seconds one more time.
• Turn the key OFF.
• Tip: This minimizes fuel spray at the lines.

Step 2: Remove the rear seat bottom

• Open both doors and pull up firmly at the front edge of the rear seat bottom to release the clips.
• If your seat uses bolts, remove them with a 10mm socket and 3/8" ratchet. Torque to 18 Nm (13 ft-lbs) on reassembly.
• Lift the seat bottom out and set it aside.

Step 3: Remove the fuel pump access cover

• Locate the round/oval access cover under the rear seat area.
• Remove the cover screws using a Phillips screwdriver #2. Torque to 2 Nm (18 in-lbs) on reassembly.
• Peel back any butyl sealer carefully (save it if it’s reusable).

Step 4: Disconnect wiring and fuel lines

• Unplug the electrical connector(s) on the fuel pump module.
• Place shop towels and a catch pan under the lines.
• Release the quick-connect fuel line(s) using a fuel line disconnect pick set (a pick is a small hooked tool that helps lift locking tabs without breaking them).
• Pull the line straight off. Expect a small amount of fuel.

Step 5: Remove the lock ring

• Clean the area around the opening with shop towels so dirt can’t fall into the tank.
• Remove the lock ring using a fuel pump lock ring tool (specialty).
• If you don’t have the ring tool, use a brass punch and small hammer to tap the ring counterclockwise (brass reduces spark risk compared to steel).
• Lift the lock ring off and set it aside.

Step 6: Remove the fuel pump module

• Carefully lift the module up and out of the tank.
• Angle it as needed to clear the float arm (fuel level sender). Don’t force it.
• Let fuel drain into the tank for a moment, then place the module into the catch pan.

Step 7: Replace the pump / module seal

• Remove the old tank seal (O-ring/gasket) from the tank opening using a trim clip removal tool gently.
• Install the new seal in the groove. Make sure it sits flat and is not twisted.
• If you’re swapping only the pump motor inside the module, move the fuel pump strainer (sock filter) to the new pump and reconnect internal hoses/clips using needle-nose pliers.
• Tip: A pinched seal causes fuel smell and leaks.

Step 8: Reinstall the module and lock ring

• Lower the module into the tank, aligning the indexing marks on the module and tank.
• Install the lock ring and tighten using the fuel pump lock ring tool (specialty) until fully seated at the stop.
• Reconnect the fuel line(s) until you hear/feel a solid “click,” then tug lightly to confirm it’s locked.
• Reconnect the electrical connector(s).

Step 9: Reinstall the access cover and rear seat

• Reinstall the access cover using a Phillips screwdriver #2. Torque to 2 Nm (18 in-lbs).
• Reinstall the rear seat bottom and any bolts using a 10mm socket. Torque to 18 Nm (13 ft-lbs).
• Reconnect the battery negative terminal using a 10mm socket. Torque to 5 Nm (44 in-lbs).

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✅ After Repair

• Turn the key to ON (don’t start) for 5 seconds, then OFF. Repeat 3 times to prime the system.
• Start the engine and let it idle for 1–2 minutes.
• Check carefully for leaks and fuel smell around the access cover and line connections.
• If you get a check engine light, you may need a scan tool to clear codes after confirming no leaks.

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💰 DIY vs Shop Cost

Shop Cost: ₹18,000-₹45,000 (parts + labor)

DIY Cost: ₹10,000-₹35,000 (parts only)

You Save: ₹8,000-₹10,000+ by doing it yourself!

Shop labor rates vary but typically run ₹800-₹1,500/hour. This repair takes a shop approximately 1.5-3.0 hours.

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🎯 Ready to get started?

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