Kia Optima: Tires and wheels / Tire replacement

Kia Optima DL3 2019-2021 Owner's Manual / Maintenance / Tires and wheels / Tire replacement

If the tire is worn evenly, a tread wear Indicator (A) will appear as a solid band across the tread. This shows there is less than 1.6 mm (1/16 inch) of tread left on the tire. Replace the tire when this happens.

Do not wait for the band to appear across the entire tread before replacing the tire.

The ABS works by comparing the speed of the wheels. The tire size affects wheel speed. When replacing tires, all 4 tires must use the same size originally supplied with the vehicle. Using tires of a different size can cause the ABS (Anti-lock Brake System) and ESC (Electronic Stability Control) to work irregularly.

✽ NOTICE

In order to maintain optimal driving performance, we recommend replacing tires with the same specification and type as originally installed in your vehicle. If not, driving performance could be altered.
When replacing tires (or wheels), it is recommended to replace the two front or two rear tires (or wheels) as a pair. Replacing just one tire can seriously affect your vehicle's handling.

Wheel alignment and tire balance

The wheels on your vehicle were aligned and balanced carefully at the factory to give you the longest tire life and best overall performance. In most cases, you will not need to have your wheels al ...

Wheel replacement

When replacing the metal wheels for any reason, make sure the new wheels are equivalent to the original factory units in diameter, rim width and offset. A wheel that is not the correct size may adv ...

Other information:

Kia Optima DL3 2019-2021 Owner's Manual: Air bag collision sensors

(1) SRS control module/ Rollover sensor (2) Front impact sensor (3) Side impact sensor (4) Side impact sensor (5) Side impact sensor WARNING - Air bag sensors Do not hit or allow any objects to impact the locations where air bags or sensors are installed. This may cause unexpected ai ...

Kia Optima DL3 2019-2021 Service and Repair Manual: Engine Electrical System

Service data Service Data Ignition System Ignition Coil Item Specification Primary Coil Resistance (Ω) 0.75 ± 15% [20°C (68°F)] Secondary Coil Resistance (kΩ) 5.9 ± 15% [20°C (68 ...