Viair 93940 40 Amp Air Compressor Relay for 12 Volt compressor , Black

ALL GOOD EXACTLY AS DESCRIBED. SUPER FAST DELIVERY WORKS GREAT

I bought this relay to replace the failed relay in my ARB single air compressor, and it’s been working great. I was a little worried about compatibility at first, but it dropped right in with no issues and got my compressor back up and running immediately. Since installing it, the compressor has been starting normally and running consistently. No weird behavior, no overheating, and no problems after multiple uses. I’ve used it several times now to air up tires and it’s been solid every time. The relay itself feels well made and reliable, which is really all you can ask for in a replacement part like this. If you’re dealing with a bad relay in a compressor or another automotive application, this is a simple and effective fix. I’m very happy with it and would definitely buy it again.

Works in a arb air compressor.

On board air in 15 minutes with this relay

Not entirely the vendors fault but please note that this is a 4 prong/post relay. It's missing the center connection so can't use it for my application. Other than that looks like a high quality relay compared to the other ones I've got from EBay and such.

One of my compressor pumps on my ARB twin compressor was staying on when the switch was turned off. I replaced the relay with this one which is much more affordable than the ARB version. This problem is common if your compressor is installed where there is excessive heat. The relay can get stuck open. Just drill the hole out to 5/16" on the plastic tab and it will fit over the ARB bolt and plug in like the original.

It’s worth the money

My ARB compressor wouldn’t switch on and fortunately it was just a bad relay after years of being in a hot engine bay. 5x cheaper and delivered in one-day thanks to Amazon. Going to order a spare to keep in the truck in the event it fails in the backcountry.

Been on for almost a year now and still works fine, plastic mounting tabs usually worry me but this one is sturdy.

The items works perfect for what is meant for

Came quickly and worked perfect

Simple, inexpensive robust (40 amps). I use it to run my bilge pump to cut down on burning out bilge pump switches. I have used other realys for this purpose, the all seem to work OK, but this was a very good price and most other relays are only 30 amps. I don't know if there is really a difference, but will go with the specs. arks are arks, the bigger the contacts the longer they last. Of course with all of this kind of stuff, until it has been in for a few years we really don't know do we? But it looks good so far.

Seems fine