The dealer could have easily provided a separate sheet for the inspection and left the invoice of work done it's own entity for record keeping. Or perhaps the leak started within the last 3k. The OP says it is at least 10k, but let's be honest, a leak can cause a serious mess in a small amount of time, and given the OP's reliance on some wording about inspections on a unrelated invoice, his judgement comes into question.

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03 3.0i mt
89 325is