This is a pretty common problem in 240s. Most likely, your subframe bushing gave out. The cheapest way on getting that fixed (99%) will be a set of subframe bushings. Installing a set of subframe bushing will take away majority of the noise coming from the failed bushings. There are a few other reasons that might also cause the same problem, but the most common will be the subframe bushings. Stop by, will cost you $149.99 installed.

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