Acura MDX owners have reported 1 problem related to engine knocking noise (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Acura MDX based on all problems reported for the MDX.
Vehicle was running normal. After sitting outside on a very cold day in wisconsin, the car would not start. It was towed to bergstrom Acura in appleton, WI where a new starter was installed and it started. There was an immediate loud knocking noise. Inspection indicated a large piece of the #5 piston broke off due to a latent manufacturing defect and destroyed the engine. Although this failure occurred in the shop, the piston could have failed on the road which could have seized the engine and caused an accident. An identical failure was also found in canada on VIN 2hnyd286x9h002434 that occurred Jan 12, 2015. Acura has been contacted and refused to consider them related and has not logged them as potential safety defects. Photos of the failed parts are available upon request.
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