Accent Overheating Slow Warm Up

Sounds familiar. I had similar overheating and slow warm-up issues with my Accent. Have you checked the thermostat housing for any leaks or damage? Also, might be worth looking at the temperature sensor readings to see if they're within the normal range.

Thanks for the quick reply! I've visually inspected the thermostat housing, and it seems okay, no visible leaks. How exactly do I check the temperature sensor readings? Is that something I can do with a standard OBD2 scanner, or do I need specialized equipment?

An OBD2 scanner should give you the temp sensor readings. If the readings are erratic or stay low even when the engine is overheating, that's a strong indicator the thermostat is faulty. Could be the map-controlled thermostat. It's a bit more complex than the old-style ones. I'd recommend taking it to a workshop to get it properly diagnosed and replaced. I'd bet on a defective thermostat and a bill around 350€.

Appreciate the advice. Sounds like I'm in over my head a bit. I'll take it to a reputable workshop and have them check the thermostat and temperature sensor. Hopefully, it's a straightforward fix. Thanks again!