4M0898710 LAB Audi Label

This is your vehicle's ambient temperature sensor. Basically, it measures the temperature outside the car, not inside. It sends that information to the car's computer. That computer then uses it for a few different things—calculating things like when to engage the automatic climate control, whether to adjust the engine’s performance for cold starts, or even if it needs to activate the rear window defroster. It’s a pretty simple device, really, just a resistor that changes its resistance based on the temperature. Think of it as one of the little helpers feeding information to the brain of the car. It doesn't make anything happen directly, it just tells the computer what’s going on outside. The computer uses that data alongside other sensor readings to optimize things. Sometimes it’s integrated into the outside mirror assembly, other times it's near the grille or behind a front bumper cover. It needs a clean airflow around it to work accurately. If this sensor goes bad, you'll likely notice if your climate control isn't working quite right—maybe it’s stuck on one temperature, or it’s not adjusting to the actual outside temperature. You might also see issues with how the engine runs, especially in colder weather—potentially rough idling or poor fuel economy. It doesn’t usually cause a catastrophic failure, but it’s annoying and can gradually affect your comfort and potentially your engine’s performance. You can often find a replacement pretty easily; Fixparts Online carries a good selection. It’s a relatively inexpensive part, and swapping it out can usually solve those climate control and cold – start issues. Trusted by drivers: Okay, I understand. Please provide the product names. I'm ready when you are. (MPN 4M0898710LAB) comes with a 12-month warranty!

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