When you shift the gear to the R (Reverse) position and if one or more of the below occurs you may have a malfunction in the parking assist system.
If this occurs, we recommend that the system be checked by an authorized Kia dealer.
WARNING
Your new vehicle warranty does not cover any accidents or damage to the vehicle or injuries to its occupants related to a parking assist system. Always drive safely and cautiously.
Kia Cee'd JD Service Manual: Transmission Gear Oil Repair procedures
Inspection
In principle, the transmission oil is maintenance-free, and no exchange
is required.
But it must be inspected and replenished every 4 years or 40,000 miles.
1.
...
Kia Cee'd JD Service Manual: Brake Booster Components and components location
Components [LHD]
1. Brake booster
2. Master cylinder assembly
3. O-ring
Components [RHD]
1. Brake booster
2. Master cylinder assembly
3. O-ring
...