🔧 Highlander - Fuel Cap Replacement

Replacing the fuel cap on your Highlander is a very simple repair. A loose, cracked, or worn fuel cap can trigger an EVAP leak code and may turn on the check engine light.

Difficulty Level: Beginner | Estimated Time: 5-10 minutes

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⚠️ Safety & Precautions

• ⚠️ Turn the vehicle fully OFF before opening the fuel door.
• ⚠️ Do not smoke or use an open flame near the fuel filler area.
• ⚠️ Avoid breathing fuel vapors directly from the filler neck.
• ⚠️ Wipe up any fuel spills immediately with a clean rag.
• ⚠️ Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Clean shop towel

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel cap - Qty: 1

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📋 Before You Begin

• Park your Highlander on level ground in a well-ventilated area.
• Shift to P and set the parking brake.
• Turn the vehicle fully OFF.
• Have the new fuel cap ready before removing the old one.
• If your check engine light is on for an EVAP leak, the light may need several drive cycles to turn off after installing the new cap.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the Fuel Door

• Use your hand to open the fuel door on the driver-side rear quarter panel.
• Put on nitrile gloves and safety glasses.
• Use a clean shop towel to wipe dirt from around the cap and filler opening.
• Keep dirt out of the filler neck.

Step 2: Remove the Old Fuel Cap

• Use your hand to turn the old fuel cap counterclockwise until it comes loose.
• Pull the cap away from the filler neck.
• If your cap has a tether strap, gently unhook the tether from the fuel door or filler area by hand.
• A tether is the small plastic strap that keeps the fuel cap attached to the vehicle.

Step 3: Inspect the Filler Neck

• Use a clean shop towel to wipe the sealing surface of the filler neck.
• Check for rust, heavy dirt, cracks, or dents where the cap seal touches.
• Do not push the towel deep into the filler neck.
• If the sealing surface is damaged, a new cap may not fully fix an EVAP leak.

Step 4: Install the New Fuel Cap

• If equipped, attach the new cap tether by hand to the original mounting point.
• Place the new fuel cap squarely onto the filler neck.
• Use your hand to turn the cap clockwise until it clicks.
• Continue turning until you hear at least one clear click.
• No torque wrench is used for this repair; the cap’s built-in ratchet click sets the correct tightness.
• One firm click is enough.

Step 5: Close the Fuel Door

• Use your hand to close the fuel door until it sits flush with the body.
• Use a clean shop towel to wipe fingerprints or fuel residue from the painted area.

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✅ After Repair

• Start your Highlander and confirm there is no fuel smell around the fuel door.
• If the check engine light was caused by a loose or leaking cap, it may turn off after a few normal trips.
• If the check engine light stays on after several drive cycles, scan for EVAP system codes before replacing more parts.
• At each refuel, tighten the fuel cap until it clicks.

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💰 DIY vs Shop Cost

Shop Cost: $60-$140 (parts + labor/inspection)

DIY Cost: $15-$45 (parts only)

You Save: $45-$95 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.2-0.5 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.