Can anyone tell me what the 'heat' light means? It's the top light on the LHS of the facia of my 1994 1.5i jap import. I have had the car 6 years and (some how!) never noticed it before. Problem now is its staying on and I'm not used to seeing this on anythign other than a diesel - I can take the bulb out but wish to find out what the light refers to first.

In Ireland the import owners need to stick together - this site is great - MADZA in Galway are incredicbly rude to anyone that didn't directly give them their business. Never seen this from a dealer before.

cheers
Guy

Hi

Can anyone tell me what the 'heat' light means? It's the top light on the LHS of the facia of my 1994 1.5i jap import. I have had the car 6 years and (some how!) never noticed it before. Problem now is its staying on and I'm not used to seeing this on anythign other than a diesel - I can take the bulb out but wish to find out what the light refers to first.

In Ireland the import owners need to stick together - this site is great - MADZA in Galway are incredicbly rude to anyone that didn't directly give them their business. Never seen this from a dealer before.

cheers
Guy

The heat light is only on imports. I don't have an exact answer for you. But it's one of two things. Some say it's a 3rd O2 sensor (if you have a V6, or 2nd if 4cyl), some says it's not. Other suggestions have been a heater to prewarm the cat. Japanese emissions laws are a lot stricter than ours.

Pull the engine codes and see if you have an O2 sensor out, replace, reset the ecu and take the car for a nice long drive… about 30 miles, give it some stick. See if the heat light comes back, or if it's still there all the time.

If it's still there, I think you need to replace the cat, but you can't fit a UK spec one... and finding an import one can be hard.

Here's a list of cats, but I do not know which one is for an import MX3 as they only list the 1.6 4cyl and 1.8 V6

http://www.buypartsby.co.uk/cat_display.php?txtmodel=MX3&Submit=Next&txtmake=MAZDA