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Here’s what you need to know: while the year range is pretty sketchy and could potentially affect the entire model run, generally 2009-12 Chrysler LX/LY cars with the 5.7 Hemi V8 and automatic trans are affected. If your Challenger is a six-speed, you are fine. During MDS (cylinder deactivation) operation at freeway speeds, for reasons that still elude Chrysler/FCA Powertrain engineers, the timing chain can break. We don’t need to tell you what happens next, and because the 5.7 is an interference engine, bent valves are pretty much guaranteed and piston damage is likely. And that doesn’t account for whether or not the timing chain guide shoe or tensioner fails, at which point there’s a possibility of fragments being introduced into the oil supply.
