Some lexus dealers are/or have approved repairer within there company, its up to you where the car goes at the end of the day, if you know where your car is going ask anyone on here if anyone has used them. :D
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Thanks for the comments so far, the LEXUS dealer I have a quote from is Edgware Road (what is their work like ?), and the approved repairer is Abbey coach works in wembley, anyone used them before? but I will probably get another quote from another Lexus dealer