Q: As a car ages, what parts would be advisable to replace to prevent car from stalling, bad parts that would not be diagnosed as bad

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Just thinking ahead. Do recommend replacing certain car parts/sensors that could become intermittently a bad part after time (150k miles) but would not be diagnosed as bad because it became intermittently bad. When tested by a mechanic, it registers as good. But, could be the culprit to the problem. Felix

There are no parts on a motor vehicle, outside of maintenance items such as brake pads and rotors, shocks and struts, engine coolant, spark plugs, timing and serpentine belts, filters, wiper blades, engine oil, and so forth, that are recommended for routine or precautionary replacement. The only exception to this might be upstream oxygen sensors but even those should be properly TESTED prior to even contemplating replacement. Excepting the foregoing, no part should be replaced on a vehicle unless there is conclusive and specific evidence that the part has failed. Due to lack of intelligent diagnostics, it is not unusual at all for perfectly good parts to be replaced on motor vehicles and you should try to avoid that to the extent possible. If you have further questions or concerns, do not hesitate to re-contact YourMechanic because we want you to make the most of your repair dollars and help you get the best possible results.

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