How to Replace the Fuel Cap on a 2018 Nissan Murano (Fix EVAP Leak & Check Engine Light)
Step-by-step fuel filler cap replacement with tools, parts, safety tips, and post-repair checks
How to Replace the Fuel Cap on a 2018 Nissan Murano (Fix EVAP Leak & Check Engine Light)
Step-by-step fuel filler cap replacement with tools, parts, safety tips, and post-repair checks
🔧 Murano - Fuel Cap Replacement
Replacing the fuel cap on your Murano is a quick job: remove the old cap and install a new one that seals correctly. A good seal prevents fuel vapor leaks that can trigger a check engine light (EVAP leak) and helps keep dirt and water out of the fuel system.
Difficulty Level: Beginner | Estimated Time: 0.1-0.2 hours
⚠️ Safety & Precautions
- 🔥 Do this outdoors or in a well-ventilated area; fuel vapors are flammable.
- 🧯 No smoking, sparks, or open flames near the fuel door.
- â›˝ Turn the engine OFF before opening the fuel door.
- 🔋 Battery disconnect is not required for this job.
🔧 Required Tools
You'll need the following tools for this repair:
- Nitrile gloves
- Safety glasses
- Clean shop towel
- Flashlight
🔩 Required Parts
HowToo sells all the parts you need for this repair:
- Fuel filler cap (OEM-equivalent, tethered) - Qty: 1
đź“‹ Before You Begin
- Park on level ground and turn the engine off.
- Let the area cool if you just drove; avoid working near hot exhaust parts.
- Open the fuel door.
🔨 Step-by-Step Instructions
Follow these steps in order:
Step 1: Remove the old fuel cap
- Put on nitrile gloves and safety glasses.
- Use your hand to turn the fuel cap counterclockwise until it releases.
- Use the flashlight to look at the sealing area (the rubber ring on the cap and the filler neck lip).
Step 2: Clean the sealing area
- Use a clean shop towel to wipe the filler neck lip where the cap seals.
- If you see cracks or tears on the old cap’s seal, that can cause an EVAP leak warning.
Step 3: Install the new fuel cap
- Thread the new cap on by hand clockwise until it seats.
- Continue tightening by hand until you feel/hear it “click” several times (this is the cap’s built-in limiter that helps prevent over-tightening).
- Tip: If it won’t thread smoothly, back off and retry.
Step 4: Confirm the tether and door operation
- Use your hand to make sure the cap tether isn’t twisted and won’t pinch in the fuel door.
- Close the fuel door and confirm it latches normally.
âś… After Repair
- Start your Murano and confirm there’s no fuel smell around the fuel door.
- If you replaced the cap because of a check engine light, it may take a few normal drive cycles for the light to turn off on its own.
- If the light stays on after several drives, the issue may be another EVAP leak (hose, purge valve, vent valve) and will need a scan for codes.
đź’° DIY vs Shop Cost
Shop Cost: $40-$120 (parts + labor)
DIY Cost: $15-$45 (parts only)
You Save: $25-$75 by doing it yourself!
Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.1-0.2 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.
