🔧 CX-5 - Fuel Cap Replacement

Replacing the fuel cap on your CX-5 is a quick fix that can stop fuel smells and help prevent an evap leak that may trigger a check engine light. You’ll remove the old cap from the filler neck and install a new cap that seals correctly.

Difficulty Level: Beginner | Estimated Time: 0.1-0.3 hours

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⚠️ Safety & Precautions

• ⚠️ Work outdoors or in a well-ventilated area—fuel vapors are flammable.
• ⚠️ Turn the engine off and keep away from sparks, cigarettes, and hot surfaces.
• ⚠️ Don’t top off the tank after the pump clicks off—can damage the evap system.

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🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Clean shop rag
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Fuel filler cap (correct fit for CX-5) - Qty: 1
• Fuel cap tether/retainer clip (if damaged or missing) - Qty: 1

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📋 Before You Begin

• Park on level ground, turn the engine off, and remove the key.
• Let the area sit 1–2 minutes if you just drove, so vapors dissipate.
• Open the fuel door and visually check the filler neck lip for dirt or damage.

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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.
• Use flashlight to inspect around the cap area.

Step 2: Remove the old fuel cap

• Put on nitrile gloves and safety glasses.
• Turn the cap counterclockwise until it releases (it will “ratchet”/click as it loosens).
• If your cap has a tether (a short strap), let the cap hang or rest it in the holder on the fuel door area.

Step 3: Clean and check the sealing surface

• Use a clean shop rag to wipe the filler neck lip (the flat edge where the cap seals).
• Use flashlight to check for cracks, dents, or heavy rust on the filler neck.
• Clean, dry sealing surfaces prevent evap leaks.

Step 4: Install the new fuel cap

• Place the new cap onto the filler neck and turn it clockwise by hand.
• Keep turning until you hear/feel at least 1–3 clicks. That “click” is the cap’s clutch letting you know it’s tight enough.
• If equipped, reattach the tether to the new cap (the tether keeps the cap from getting lost).

Step 5: Close up

• Close the fuel door with your hand until it latches.
• Use the clean shop rag to wipe any spilled fuel (if present) and let fumes clear.

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✅ After Repair

• Start the engine and confirm there’s no fuel smell near the fuel door.
• If you had a check engine light from a loose/bad cap, it may take a few normal drives to turn off on its own.
• If the light stays on after several trips, the issue may be another evap leak (not just the cap).

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💰 DIY vs Shop Cost

Shop Cost: $30-$90 (parts + labor)

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

You Save: $15-$45 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.1-0.3 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.