🔧 CX-5 - Fuel Cap Replacement

Replacing the fuel cap on your CX-5 is one of the easiest DIY repairs. A worn, loose, cracked, or missing fuel cap can trigger an EVAP system leak code and may turn on the check engine light.

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

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⚠️ Safety & Precautions

• 🔥 Do this repair with the engine off and away from open flames, cigarettes, heaters, or sparks.
• 🧤 Fuel vapors can irritate skin and eyes, so wear gloves and safety glasses.
• ⛽ Do not overfill the tank after replacing the cap; stop fueling when the pump clicks off the first time.
• 🔋 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
• Plastic trim tool

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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 CX-5 on level ground in a well-ventilated area.
• Shift to Park and set the parking brake.
• Turn the engine off and keep the key fob away from the start button area.
• Let the vehicle sit for a minute before opening the fuel door so fuel vapors can settle.
• A plastic trim tool is a soft pry tool that helps release clips without scratching paint or plastic.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the Fuel Door

• Use your hand to press the rear edge of the fuel door inward, then release it.
• The fuel door should pop open.
• If it sticks, use a plastic trim tool gently at the edge of the fuel door. Do not use a metal screwdriver because it can damage the paint.
• Press gently to avoid dents.

Step 2: Remove the Old Fuel Cap

• Put on nitrile gloves and safety glasses.
• Turn the old fuel cap counterclockwise by hand until it comes loose.
• Pull the cap away from the filler neck.
• There is no torque spec for removal because the cap is hand-tightened only.

Step 3: Detach the Fuel Cap Tether

• Look at the small plastic strap connected to the old fuel cap. This is the tether, which keeps the cap from falling away during refueling.
• Use your hand to unclip the tether from the fuel door area if it has a removable clip.
• If the tether clip is snug, use a plastic trim tool to gently lift the clip free.
• Do not twist or force the fuel door hinge.

Step 4: Inspect the Filler Neck

• Use your eyes to check the metal filler neck opening for dirt, damage, or stuck rubber pieces from the old cap seal.
• Do not push anything into the filler neck.
• If you see loose debris on the outer rim, wipe only the outside sealing surface by hand with a clean glove.
• Keep dirt out of the tank.

Step 5: Install the New Fuel Cap Tether

• Position the new cap tether in the same place as the old one.
• Push the tether clip into place by hand until it seats fully.
• If needed, use a plastic trim tool to gently guide the clip into the slot.

Step 6: Install the New Fuel Cap

• Place the new fuel cap onto the filler neck by hand.
• Turn the cap clockwise by hand until it clicks.
• Keep turning until you hear at least one firm click.
• Torque to hand-tight only; stop after the cap clicks.
• Do not use pliers or any other tool to tighten the cap.

Step 7: Close the Fuel Door

• Use your hand to swing the fuel door closed.
• Press the fuel door gently until it latches flush with the body.
• Make sure the tether is not pinched between the fuel door and body.

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✅ After Repair

• Start your CX-5 and confirm there is no fuel smell around the fuel door.
• If the check engine light was on from a loose or faulty cap, it may take several normal drive cycles to turn off by itself.
• If the light stays on after several days of driving, the EVAP system may need a scan for stored trouble codes.
• At your next fuel stop, tighten the cap until it clicks after fueling.

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💰 DIY vs Shop Cost

Shop Cost: $60-$130 parts + labor

DIY Cost: $15-$45 parts only

You Save: $45-$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.