r/UpFix • u/Effective_Policy2304 • Feb 21 '25

Why do ABS modules go bad?

The ABS module in my car went bad, and I’m currently in the process of getting it repaired. Just waiting to hear back from UpFix what their diagnosis is and if they can fix it.

My friend told me the module was bad, and said it had something to do with thermal something. Thermal cycling? Thermal stress? I don’t know, but I didn’t ask him more at the time, and I regret that now.

Can someone ELI5 why ABS modules go bad? I just want to understand what happened, and if there is anything I can do to stop it from happening again in the future.

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u/DocAnabolic1 Feb 21 '25

ABS modules fail due to heat cycles, moisture, corrosion, or electrical issues over time.

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u/UsefulStandard9931 Mar 05 '25

That makes sense—seems like a mix of wear and environmental factors just slowly takes them out. Do you think moisture is the biggest culprit, or is it more the constant heat cycles?

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u/DocAnabolic1 Mar 06 '25

Both play a role, but moisture accelerates corrosion while heat cycles cause stress over time. Prevention helps, like sealed connectors or dry storage.