How can you estimate cost of repair without a diag. If you want a estimate for a repair that you know exactly what parts that you want replace a simple phone call to your service advisor at your local dealer will get you a estimate of parts and labor. Note that when you so this the estimate is for replacement of the part only not for any diag time if your diag does not correct the problem. There are two accumulators on your car. No I will not make a guess at the labor time.