I can't help but others will need to know year and engine to give you any idea of the cost. Parts and labor vary by source of parts and cost of labor in your particular area and who does the work. Hard to give you a good idea. Best approach is to get an estimate from two sources or from a well recommended Indy show that specializes in BMWs.

Suggest you add year and model to your signature for the future.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas