🔧 Tucson - Fuel Cap Replacement

Replacing the fuel cap on your Tucson is one of the easiest repairs you can do. A worn, cracked, loose, or missing fuel cap can trigger an evaporative emissions leak warning and may turn on the check engine light.

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

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⚠️ Safety & Precautions

• 🔥 Work in a well-ventilated area and keep flames, cigarettes, sparks, and hot tools away from the fuel filler area.
• 🧤 Avoid breathing fuel vapors directly when the fuel door is open.
• 🚗 Park your Tucson on level ground and shut the engine off before starting.
• 🔋 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 filler cap - Qty: 1

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📋 Before You Begin

• Park your Tucson on level ground with the engine turned off.
• Set the parking brake.
• Let the vehicle sit for a minute before opening the fuel door if you recently drove it.
• The fuel cap has a tether, which is the small plastic strap that keeps the cap attached to the fuel door area.

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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 dust away from the area around the fuel cap.
• Keep dirt out of the filler neck.

Step 2: Remove the Old Fuel Cap

• Use your hand to turn the fuel cap counterclockwise until it comes loose.
• Let the cap hang by its tether if it is still attached.
• Look at the rubber sealing ring on the old cap. If it is cracked, flattened, missing, or hard, replacement is needed.

Step 3: Detach the Fuel Cap Tether

• Use your fingers to remove the tether from its mounting point near the fuel door opening.
• The tether usually pops off the small retaining post by pulling it straight away by hand.
• Do not pry hard against the painted fuel door area.
• Gentle pressure prevents broken plastic.

Step 4: Install the New Fuel Cap Tether

• Use your fingers to press the new fuel cap tether onto the retaining post.
• Make sure the tether is fully seated and does not fall off when lightly tugged.

Step 5: Install the New Fuel Cap

• Place the new fuel cap onto the filler neck by hand.
• Turn it clockwise until you hear or feel several clicks.
• No torque wrench is used for this cap; tighten it by hand until it clicks.
• Torque to hand-tight until clicking stops; do not overtighten.

Step 6: 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 paint.

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✅ After Repair

• Start your Tucson and check that the fuel door area is secure.
• If the check engine light was on because of 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, parked, cooled down, and driven again while the engine computer checks the fuel vapor system.
• If the check engine light stays on after several days of normal driving, have the codes scanned to confirm there is not another evaporative emissions leak.

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💰 DIY vs Shop Cost

Shop Cost: $35-$90 (parts + labor)

DIY Cost: $15-$35 (parts only)

You Save: $20-$55 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.2-0.3 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.