- Seals off your fuel tank and prevents contaminants in your gas supply
- Plays an important role in the EVAP system
- Easy to replace on your own
The Fuel Tank Cap on your Nissan is often neglected. You remove the Fuel Tank Cap, top off your fuel levels, and then secure it back on with every trip to the pump, but you likely don't give this part another thought.
Your Fuel Tank Cap has a vital role in the performance of your Nissan as a whole. You already know that it seals off your fuel tank and keeps outside dirt, water, and other harmful debris from getting into your fuel. But here's another thing: the Fuel Tank Cap is an integral part of the EVAP, or evaporative emissions system, within your Nissan.
As your engine runs, your fuel temperature rises, and it releases harmful fumes. But, with a properly working Fuel Tank Cap, your EVAP system can catch those fumes to stop them from leaking out into the surrounding atmosphere.
If your Fuel Tank Cap doesn't make clicking sounds when it screws into its opening, or if it loosens on its own even after you've tightened it completely, you're likely dealing with a worn out gas tank cap. Since this part is a component in the EVAP system in your Nissan, your engine indicator light may turn on if the fuel tank cap is malfunctioning. Other indicators of an old Fuel Tank Cap can include gasoline odors while the engine is running and lower fuel mileage (with no change in your driving habits).
There are a couple of drawbacks of a Fuel Tank Cap that has cracked or worn down. A Fuel Tank Cap that doesn't fully seal may release damaging byproducts into the environment, but it can also create a domino effect of other issues in your Nissan. A worn out Fuel Tank Cap can diminish engine performance, lead to poor gas mileage, and create messy fuel leaks. It's wise to replace your Fuel Tank Cap immediately once you notice that it is no longer functioning correctly.
Replacing a damaged Fuel Tank Cap couldn't be easier, and you can do it yourself. All you need to do is shop with Nissan directly to ensure the best possible fit.
The Fuel Tank Cap listed here (part 17251ZK31A) will fit the following: Nissan Maxima. Click on the What This Fits tab for further info.
CAP ASSY-FILLER
Fits Maxima