For some years now before the engine is warm the car has difficulty getting in gear, particularly in reverse. I suspect a transmission issue but we have been able to drive the car for 3 years without a repair.
How does one change the transmission fluid? Kia Rio 2003 on 2003 Kia Rio
have it done by a pro. most are drain and fill but some are more difficult these days. having it done is money well spent to make sure its done right