Assist Strap – Kia (85340-D4200WK)

Assist Strap mounts inside the Kia door shell and takes the wear that repeated use puts on the door. Genuine Kia part number 85340-D4200WK.

Water ingress past a failed seal corrodes the internal linkage, which is why the symptom appears suddenly after a wet season. Door hardware is handed — left and right are different parts. Check the side marked on the listing against the door you are repairing.

Check the door alignment after fitting, as a worn part often masks a hinge that also needs adjustment.

Door Check Straps Assist Strap replacement for Kia. Cross-check the part number against the component you are removing before ordering.