Cap Filler. Screw.
Fuel Tank Cap.
- 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
Your INFINITI Fuel Tank Cap is one component that is frequently overlooked. You twist off the Fuel Tank Cap, top off your fuel levels, and then secure it back on every time you get fuel, but somehow this essential component remains an afterthought.
The Fuel Tank Cap serves a big part in the overall function of your INFINITI. For starters, it creates a seal for the fuel tank and prevents debris, moisture, and dirt particles from seeping into your gas supply. But, it has another purpose, too. The Fuel Tank Cap is also part of the evaporative emissions system (aka EVAP) in your INFINITI.
When your engine is running, your fuel heats up significantly and releases toxic vapors. But, with a properly working Fuel Tank Cap, your EVAP system can catch these exhaust gases to stop them from leaking out into the atmosphere.
If your INFINITI Fuel Tank Cap no longer clicks into its opening, or if it frequently loosens after being tightened, you likely have a worn out gas tank cap. Since this component is also part of the EVAP system in your INFINITI, your dashboard engine light may illuminate if the fuel tank cap is faulty. Other indicators of a damaged or worn Fuel Tank Cap include smelling gasoline while driving and diminished fuel mileage without having changed any of your travel habits.
Consider the downsides to a Fuel Tank Cap that has cracked or worn down. A Fuel Tank Cap that doesn't fully seal can release harmful emissions into the atmosphere, and it could also lead to a domino effect of other issues within your INFINITI's engine. A failing Fuel Tank Cap can decrease engine performance, lessen your fuel efficiency, and create messy fuel leaks. It's wise to replace your Fuel Tank Cap ASAP once you realize that it isn't sealing or tightening properly.
Replacing an old Fuel Tank Cap couldn't be easier, and you don't need special tools to do it. You just need to shop with INFINITI directly to get a perfect fit for your model and trim.
This Fuel Tank Cap, part 1725179920, will fit the following: INFINITI G20, INFINITI M30, or INFINITI Q45. See the What This Fits section for additional information.
SCREW
Fits G20, I30, I35, Q45, QX4