RKX Gas Cap Replacement Seal Compatible with Honda/Acura Civic, Accord, Pilot, Odyssey, Element, TL, RDX cars

We have 152K miles on our 2002 Acura MDX. The other day the Check Engine light came on (for the first time ever) and so I plugged in the OBDII reader and saw code P1456 "Fuel Tank EVAP System Leak". This code is normally caused by a poorly-sealing gas cap that allows fuel vapors to leak out. The system detects a pressure drop in the tank and throws the error code. Sometimes, the error can be fixed by tightening the cap. However, if the cap is older, then the rubber seal in the cap is often hard/cracked and can no longer provide a good seal.Upon inspecting my cap, sure enough, the seal was completely flattened after 18 years of use. You can see the comparison between the old and new seals in my photos where the new seal has a clearly defined V-shaped gap between the upper and lower surfaces whereas the old seal is completely collapsed. The cap itself is in perfect shape --only the seal is worn. At first I thought I'd have to buy a new cap ($40 from Honda) or a cheaper aftermarket cap. There are a lot of complaints that the cheaper aftermarket caps are hit and miss so I avoided that option. Fortunately, I stumbled across this replacement seal on Amazon and it worked perfectly to fix the vapor leak and error code! I could tell a difference immediately upon reinstalling the gas cap and could feel the new gasket applying pressure to the filler neck until the cap clicked. Even better, when I removed the cap to fill the tank a few days later, I heard the "whoosh" of the tank pressure being relieved as I unscrewed the cap. That's a sound I haven't heard from the car in many years --a sure sign that my gas cap seal was well-worn many years ago but not quite enough to throw the error code until last week.The new seal is nitrile rubber (fuel resistant) and is a perfect match to the OEM seal. This is a GREAT product that saves you $30 over a new OEM cap and also saves you from throwing a perfectly good OEM cap in the trash. Couldn't be happier to have found this simple, effective product!

I bought this on October 2, 2019 in an effort to fix a P1457 diagnostic trouble code on a 2003 Honda Civic Si. This did not fix the trouble code which was ultimately fixed by replacing the canister vent shut valve but I left the gasket on anyways. It is now May 7, 2020 and a P1456 diagnostic trouble code tripped - i.e. EVAP Control System Leakage (Fuel Tank System). Checking the gas cap, the replacement gasket that I installed was very distorted and deformed, which caused it to leak and trip the code. Fortunately, I kept the old OE gasket and put it back on the cap. So I got about 7 months of service on the replacement gasket (vs. ~17 years of service on the OE gas cap and gasket).The good: The seal fits tightly on the gas cap and initially works well.The bad: The rubber compound used in this replacement gasket appears to be more elastic than the OE type seal. Repeated gas cap open and close cycles tends to stretch this replacement gasket to the point it will lose it's seal and leak, triggering a "loose gas cap" trouble code. An OE gas cap fixes this issue.The ugly: The service life for this item is ~7 months.

I drive a 2009 Honda Accord EX-L which I absolutely love. When the light on my dash showed up I replaced my gas cap with an cheaper gas cap that wasn’t a Honda brand cap. It worked okay, but was very difficult to remove and it wouldn’t fit into the door spot that holds your cap while you pump your gas. So as I researched a new Honda gas cap, not a knock off, I found the dealership would sell me one for $50. The would install for another $28. What a deal??? By the way someone else on here was told true Honda replacement parts have an H on them. My original does not have an H. That made me think that was someone at a dealership trying to sell a $50 cap. Here on Amazon I found true Honda replacement cap for about $32. Than I came across the gasket. Let’s face it, it was probably the only thing that wore out on my 10 yr old gas cap. So i took a chance. So now I have my original Honda gas cap and a new gasket for about $8 bucks. Was super easy to put on and works perfect!!! And it arrived very quickly...

I'm a professional mechanic and in my personal experience I've found it can be very difficult to get the right gas cap in an aftermarket part. I could have just bought a new Honda gas cap for almost 40 bucks but the only thing wrong with the old one is the seal. I had a "check gas cap" message and a pending code for a "very small evap leak" which is far more annoying than harmful or damaging. I installed this new seal about 3 weeks ago and haven't had any trouble since so it was worth it. -2011 Honda Accord-

My engine light was on with an emissions code. I thought, oh no, this is going to cost me a fortune! I then found this gasket for nearly nothing. Never thought it would work but I was hoping. It worked!! After several days, the engine light went out. (I read elsewhere that it takes several days for the computer to accept new readings from emissions) Be patient and maybe it will work for you too.