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Please advise! I owe Jaguar XJ 3.0 V6 diesel 2010 The main Jaguar dealer are telling me that I need a timing belt replacement, however, when I contacted the main dealer Stratstone from which the car was originally purchased from tells me that the car is chain driven and no need to change. I am a bit puzzled as my car already done 110 000 miles and it would be the right time to replace timing belt in the case it had a belt , not a chain.