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I have a 2004 Mazda Axela which developed a transmission problem. Warning lights came on and wouldn't change past 3rd gear. My query though is concerned with the repair of this problem.
Took the car to my local mechanic who put it on their diagnostic computer and resolved that the transmission solenoid was faulty. Solenoid was replaced but didn't fix the problem. Car then sent to a transmission repair expert who thought the issue may be a faulty transmission computer. They got a test computer to check with and yes, this was the problem. Mechanic then replaced the faulty computer with a new one - problem solved. Question is: should I be expected to pay for the replacement solenoid which was not at faulty?

Hi there,
If the mechanic was certain that they had identified the fault and replaced a part without actually testing it and identifying the problem 100% And it turned out that it wasn't that, then that workshop should be prepared to return the vehicle back to how it was or suffer a loss for the misdiagnoses. Sometimes the diagnostic code could point to a specific area that is not working but it can often be the part or the controller of that part (ecu). If the technician wasn't sure of the exact remedy, they should say so and keep the customer informed of potential outcome.