IsItAGoodCar
Reliability Guide

Common Problems with the
2008 Kia Sedona

We've identified 2 known issues that can affect the 2008 Kia Sedona. 1 of these are serious faults that could be expensive to repair.

2
Known Issues
1
Serious
1
Moderate
0
Minor

All Known Issues

Rear Auxiliary Heater Underbody Pipe Corrosion and Coolant Loss

SeriousCooling System

The Sedona features a dedicated rear passenger heater matrix supplied by metal coolant lines routed along the underside of the vehicle chassis. Exposed directly to road salt, grit spray, and damp UK winter conditions, these steel pipes corrode and eventually develop pinhole perforations. Coolant leaks out rapidly beneath the car, leading to sudden engine overheating and potential cylinder head gasket failure if the driver fails to notice the dropping coolant gauge. Replacing the metal lines with upgraded rubber hoses or aluminium lines is a well-known specialist fix.

Est. Repair Cost: £250–£550
Warning Signs:

Puddle of pink or green coolant on the ground beneath the centre or rear floorpan of the car, Loss of cabin heating output accompanied by rising temperature gauge reading, Coolant header tank level repeatedly dropping below minimum mark

What to Inspect:
  • Look underneath the vehicle along the chassis rails for dampness, crusty coolant crystallization, or corroded metal pipe runs
  • Inspect the engine coolant expansion bottle with the engine cold to ensure the level is correct and pressure seals are intact
  • Turn the rear climate control fan on high to confirm hot air blows through the rear passenger vents
Verified by IsItAGoodCar Research TeamUpdated

Electric Power Sliding Door Cable and Actuator Failure

ModerateBodywork & Rust

Higher-specification second-generation Sedonas (such as the TS and 3 trim grades) feature electrically operated power-sliding rear side doors. The drive mechanisms rely on steel tension cables, plastic pulleys, and microswitch sensors located within the rear quarter panels and sill runners. With age, road grit accumulates in the lower floor tracks, door seals stick, and the steel drive cables fray or snap. When this occurs, the electric motor jams, leaving the door unable to open or latch shut automatically, necessitating manual override or expensive cable kit renewal.

Est. Repair Cost: £200–£600
Warning Signs:

Sliding door beeps and reverses direction midway through opening or closing, Grinding or whining noise from the rear quarter panel when pressing the door button, Sliding door fails to pull in and latch flush with the exterior rear bodywork

What to Inspect:
  • Operate both side sliding doors repeatedly using the overhead console switches, key fob, and interior pillar buttons
  • Inspect the lower sill guide tracks for debris, dried grease, or physical deformation
  • Verify that the doors latch shut tightly and extinguish the open door warning light on the dashboard
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 2008 Kia Sedona

  • Inspect the operation of both sliding side doors (electric on high-spec models) for smooth gliding on tracks and secure latching
  • Check the condition of the 2.9 CRDi engine oil and cooling system, looking for signs of oil contamination or cooling hose degradation
  • Inspect the rear subframe, chassis outriggers, and brake pipe runs for road salt corrosion that can lead to MOT structural failure
  • Confirm that the front and rear heating and ventilation blowers both output hot and cold air, as rear underbody coolant pipes are prone to leaking
  • Test the manual clutch pedal effort and check for shudder, as the Sedona heavy kerb weight puts considerable strain on the driveline
Check a 2008 Kia Sedona by Registration