Some Audi S4 owners report experiencing issues with the tire pressure monitoring system (TPMS), including faulty tire pressure sensors that may illuminate the warning light due to damage or failure. Additionally, unbalanced tire pressure can trigger a "TPMS Malfunction" warning, especially if one tire is significantly lower than the others. Some owners also find that incorrect tire pressures set by dealers can lead to warnings shortly after purchase, particularly if the tires are overinflated or underinflated. To address these concerns, owners are advised to manually check tire pressures against recommended values, reset the TPMS as per the owner's manual, and diagnose or replace any faulty sensors to maintain the system's safety and functionality.
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