When my parents just brought their X5 diesel in for service, the key also directed the dealer to replace the fuel filter so it was done as part of routine maintenance. The vehicle only has 29k mls, which surprised me because it seems like few, if anyone else has had this done.

It also prompted the dealer to change the engine air filter (not microfilter) so this was done as well.

Is this out of the ordinary? Their lease is almost up and it was all covered under maintenance so we don't care, but it seems like a lot of maintenance, maybe more than normal. Kind of expensive if paying for it on one's own too.

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2014 Mazda 3 GT: Ø Consumption: (click for details)