🔧 Wrangler - Fuel Cap Replacement

Replacing the fuel cap on your Wrangler is one of the easiest DIY repairs. A worn or loose fuel cap can cause fuel vapor leaks and may trigger a check engine light or EVAP leak code.

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

---

⚠️ Safety & Precautions

• ⚠️ Work in a well-ventilated area away from open flames, cigarettes, sparks, or hot tools.
• ⚠️ Do not replace the cap while refueling or with fuel spilled around the filler neck.
• ⚠️ If you smell strong fuel vapor after replacement, stop and inspect the cap seal and filler neck.
• ⚠️ Battery disconnect is not required for this repair.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Nitrile gloves
• Safety glasses
• Clean microfiber cloth

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Locking or non-locking fuel cap - Qty: 1

---

📋 Before You Begin

• 🅿️ Park your Wrangler on level ground and turn the engine off.
• 🔑 Remove the ignition key and keep it away from the vehicle while working.
• 🧤 Put on nitrile gloves and safety glasses before touching the fuel filler area.
• 🧼 Make sure the area around the fuel filler is clean so dirt does not enter the tank.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Open the Fuel Door

• Use your hand to open the fuel filler door on the left rear side of your Wrangler.
• Use a clean microfiber cloth to wipe dust or dirt away from the fuel cap area.
• Keep dirt out of the tank.

Step 2: Remove the Old Fuel Cap

• Use your hand to turn the old fuel cap counterclockwise until it comes loose.
• If your Wrangler has a tether, which is the small plastic strap that keeps the cap attached, gently slide or unclip the tether from its mount by hand.
• Do not use pliers or pry tools on the filler neck because it can damage the sealing surface.

Step 3: Inspect the Filler Neck

• Use a clean microfiber cloth to gently wipe the flat sealing surface where the cap gasket sits.
• Look for rust, cracks, dents, or stuck rubber from the old cap seal.
• If the filler neck sealing surface is damaged, the new cap may not seal correctly.

Step 4: 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 several times.
• The clicking sound means the cap has reached its built-in tightening limit; no torque wrench is used for this part.
• Torque to hand-tight until multiple clicks are heard

Step 5: Reattach the Tether

• If the new cap includes a tether, use your hand to attach it to the fuel door or filler housing in the same location as the old one.
• Make sure the tether does not get pinched when the fuel door closes.

Step 6: Close the Fuel Door

• Use your hand to close the fuel door fully.
• Make sure it sits flush with the body and does not rub the tether or cap.

---

✅ After Repair

• ✅ Start your Wrangler and check that there is no strong fuel smell around the left rear filler area.
• ✅ 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, parked, cooled down, and driven again while the computer retests the EVAP system.
• ✅ If the check engine light stays on after several days, scan for codes; common fuel-cap-related codes include small EVAP leak codes.

---

💰 DIY vs Shop Cost

Shop Cost: $45-$100 parts + labor

DIY Cost: $10-$35 parts only

You Save: $35-$65 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.

---

🎯 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.