🔧 Forester - Fuel Cap Replacement

Replacing the fuel cap on your Forester is a quick job that helps prevent fuel vapor leaks and keeps the check engine light from coming on due to an EVAP leak. You’ll remove the old cap, transfer/verify the tether (strap), and install the new cap until it “clicks.”

Difficulty Level: Beginner | Estimated Time: 0.1-0.2 hours

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⚠️ Safety & Precautions

• ⛽ Work in a well-ventilated area and avoid sparks/open flames near the fuel door.
• 🧤 Fuel can irritate skin—wear gloves and wipe any spilled fuel right away.
• 🔧 No battery disconnect is required for this repair.

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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 (EVAP sealing type, tethered) - Qty: 1

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📋 Before You Begin

• 🅿️ Park on level ground, shift to Park, and shut the engine off.
• ⛽ If you just drove, wait a minute before opening the cap so any tank pressure can vent slowly.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the fuel door

• Use your hand to pull the fuel door open on the driver side rear quarter panel.
• Use a flashlight if it’s dark to clearly see the cap and sealing area.

Step 2: Remove the old fuel cap

• Put on nitrile gloves.
• Turn the cap counterclockwise by hand until it releases.
• Let the cap hang by the tether (the little strap that keeps it from dropping). Keep dirt off the sealing surface.

Step 3: Inspect the filler neck sealing surface

• Use a flashlight to look at the rim of the filler neck where the cap seals.
• If you see dust or grit, wipe it off with a shop towel so the new cap can seal properly.

Step 4: Transfer/verify the tether (if needed)

• Compare the new cap to the old cap and confirm the tether length and attachment style match.
• If the new cap does not include a tether, move the tether over exactly as it was on the old cap (by hand). If it won’t transfer easily, stop and use a correct tethered cap.

Step 5: Install the new fuel cap

• Place the new cap onto the filler neck and turn it clockwise by hand.
• Tighten until you feel/hear it click several times (this is the cap’s built-in clutch that prevents overtightening).

Step 6: Close the fuel door

• Push the fuel door closed with your hand until it’s fully latched.
• Use a shop towel to wipe any fingerprints or fuel residue around the area.

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✅ After Repair

• 🧪 Start the engine and confirm there’s no fuel smell around the fuel door.
• 🔎 If your check engine light was on from a loose/bad cap, it may take a few normal drive cycles to turn off on its own.
• 🛠️ If the light stays on after a few days of mixed driving, the EVAP system may have another leak and should be scanned for codes.

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💰 DIY vs Shop Cost

Shop Cost: $25-$80 (parts + labor)

DIY Cost: $15-$40 (parts only)

You Save: $10-$40 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.1-0.2 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.