🔧 Highlander - Fuel Cap Replacement

Replacing the fuel cap on your Highlander is a simple beginner-friendly repair. A worn, loose, cracked, or missing fuel cap can cause an evaporative emissions leak and may trigger a check engine light.

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

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⚠️ Safety & Precautions

• ⚠️ Work in a well-ventilated area away from flames, sparks, cigarettes, or hot surfaces.
• ⚠️ Do not top off the tank while doing this repair.
• ⚠️ Keep the fuel door area clean so dirt does not enter the filler neck.
• ⚠️ 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 microfiber 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.
• Shift to Park and set the parking brake.
• Turn the vehicle fully OFF and keep the key/fob away from the start button.
• Put on safety glasses and nitrile gloves. Nitrile gloves are fuel-resistant disposable gloves that help protect your skin.

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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.
• If needed, use a clean microfiber towel to wipe dust from around the fuel door before opening the cap area.
• Keep dirt away from the filler neck.

Step 2: Remove the Old Fuel Cap

• Use your hand to turn the fuel cap counterclockwise until it releases.
• A small hiss may be heard. That can be normal pressure equalizing.
• Let the cap hang by its tether if it is still attached.

Step 3: Remove the Tether From the Fuel Door

• Use your hand to pull the old cap tether loop off its retaining point on the fuel door or fuel door bracket.
• The tether is the small flexible strap that keeps the cap from falling away from the vehicle.
• If the tether is stiff, gently rotate it while pulling. Do not pry against painted surfaces.

Step 4: Inspect the Fuel Filler Neck

• Use a clean microfiber towel to gently wipe the sealing surface at the top of the filler neck.
• The sealing surface is the smooth area where the rubber seal on the cap presses tight.
• Do not push dirt into the filler neck.

Step 5: Install the New Fuel Cap Tether

• Use your hand to attach the new fuel cap tether to the same retaining point used by the old cap.
• Make sure the tether is not twisted and will not get pinched when the fuel door closes.

Step 6: Install the New Fuel Cap

• Use your hand to place the new fuel cap squarely onto the filler neck.
• Turn the cap clockwise until it clicks.
• Continue turning until you hear at least one clear click.
• No torque wrench is used for this cap; tighten by hand only.
• Stop after it clicks securely.

Step 7: Close the Fuel Door

• Use your hand to close the fuel door fully.
• Make sure the tether is tucked inside and does not block the door from closing.

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✅ After Repair

• Start your Highlander and confirm the fuel door is closed securely.
• If the check engine light was caused by a loose or leaking fuel cap, it may take several drive cycles to turn off on its own.
• A drive cycle means the vehicle is driven, warmed up, parked, and restarted under normal conditions.
• If the check engine light stays on after several days of normal driving, the vehicle should be scanned for diagnostic trouble codes.

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💰 DIY vs Shop Cost

Shop Cost: $60-$130 parts + labor

DIY Cost: $20-$45 parts only

You Save: $40-$85 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.2-0.4 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.