Hi, I used service of one garage in Wakra, called Musafir garage (its on the inner main road of Wakra). My car alternator was showing problems, and I had two of the carbon bushes replaced through them. Also, please check Al-Nile garage in Wakra, the owner there is a expert, and can give you advise and solve your problem, but may be a bit pricey (but less than the dealers).