One problem related to computer failure has been reported for the 1998 Mazda 626. The most recently reported issues are listed below.
Transmission was replaced at 37,000 or 38,000 miles. Was still under warranty. Replaced spark plugs twice before 50,000 miles. 1st at dealership(80. 00) 2nd by my husband 3,000 miles after the 1st time. 2 mths. Later same problem not plugs but replaced spark plug wires. Replaced front rotors(should not be replaced that early) before original brake pads were worn down completely. Put in shop Dec. 01-computer said bad O2 sensor replaced both sensors(90. 00) still same problem. Called Mazda, filed a complaint with Mazda. They did nothing. They said not enough files had been issued to warrant a recall. I think that is a lie. All over the internet you find complaints of this particular car Mazda 626 transmission problems. These cars are notorious for that. It is a shame that Mazda makes a product as this and does not stand behind what it produces. They are just lazy and do not care to help the public. You would think they would care about their reputation. They have a very bad reputation with the Mazda 626 transmissions and they don't even seem to care. This vehicle needs to be recalled and everyone that still has paperwork needs to be reimbursed by Mazda for all the money people have paid to get their cars fixed. Thank goodness we got rid of ours a few months ago. I tell eveyone I know that is looking into buying a car not to get a Mazda.