🔧 Supra - Fuel Cap Replacement

Replacing the fuel cap on your Supra is a quick job: you remove the old cap from the filler neck and install the new one. A good seal matters because it prevents fuel vapor leaks and can help avoid an EVAP leak check-engine light.

Difficulty Level: Beginner | Estimated Time: 0.1-0.3 hours

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⚠️ Safety & Precautions

• ⚠️ Work outdoors or in a well-ventilated area; fuel vapors are flammable.
• ⚠️ No smoking, sparks, or open flames near the fuel door.
• ⚠️ Don’t “top off” the tank after the pump clicks off.
• ⚠️ Engine off before opening the fuel door/cap.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Shop towel
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel filler cap - Qty: 1

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📋 Before You Begin

• Park on level ground and turn the engine off.
• Open the fuel door and wipe the area with a shop towel so dirt doesn’t fall into the filler neck.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the fuel door

• With the car unlocked, press the fuel door to pop it open.
• Use a flashlight to check the area is clean and dry.

Step 2: Remove the old fuel cap

• Put on nitrile gloves.
• Turn the cap counterclockwise until it releases, then pull it straight off.
• If there’s a tether (a small retaining strap), let the cap hang—don’t twist the strap. Don’t force it if it binds.

Step 3: Inspect the sealing area

• Use a shop towel to wipe the filler neck’s sealing surface (the smooth ring where the cap seals).
• Use a flashlight to confirm there’s no grit, cracks, or damage on the sealing surface.

Step 4: Install the new fuel cap

• Place the new cap onto the filler neck and turn it clockwise by hand.
• Keep turning until it is fully seated and tight. Many caps “click” when properly tightened—if yours clicks, tighten until it clicks.
• Close the fuel door until it latches.

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✅ After Repair

• Start your Supra and confirm there is no fuel smell around the fuel door area.
• If you were replacing the cap due to a check-engine light, it may take a few normal drive cycles for the light to clear on its own.
• If the light stays on, the issue may be elsewhere in the EVAP system (like a purge valve or vent valve).

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💰 DIY vs Shop Cost

Shop Cost: $30-$120 (parts + labor)

DIY Cost: $15-$60 (parts only)

You Save: $15-$60 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.1-0.3 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.