Kia Stinger: Rear Brake Rotor and Caliper Slide Pin Corrosion Causing Pad Drag

The Stinger's rear brakes are disproportionately susceptible to corrosion-induced caliper slide pin seizure compared to the front, exacerbated by the integrated EPB drum-in-hat design and limited airflow around the rear rotors. Seized slide pins prevent the outer brake pad from retracting fully after braking, causing constant pad-to-rotor contact. This generates significant heat, accelerated pad and rotor wear on one side, and a persistent pulling sensation under light braking. The problem is most common in higher-rainfall or road-salt environments. Multiple StingerForum threads confirm owners finding one rear caliper with a seized slide pin causing uneven rotor wear. The repair requires disassembly, slide pin cleaning or replacement, new boots, and usually new pads and rotors on the affected corner.

• One rear wheel significantly hotter than the other after moderate driving with no hard braking
• Uneven pad wear visible — inner or outer pad worn to the metal on one corner while the other side has material remaining
• Grooved or scored rear rotor on one side only, with a pronounced step at the rotor edge
• Vehicle pulling slightly to one side under light to moderate braking
• Burning brake smell from one rear corner during or after extended driving

After a test drive of moderate length, carefully touch the centre of each rear wheel through the spokes (do not touch the rotor directly) and compare left versus right temperature. A seized caliper will make one wheel noticeably hotter. Visually inspect rear rotor faces for uneven wear grooves or a pronounced lip on only one side of the disc. Physically push the caliper slide pins to confirm free movement.

Parts involved: Brake disc and pads, Body corrosion.

$600 to $2,000 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

• “Have the rear brake calipers and slide pins been serviced or replaced, and were the caliper dust boots found to be intact at that time?”
• “Has the vehicle spent time in a high-rainfall, coastal or road-salt environment where corrosion accelerates?”
• “Is the rear brake pad wear even from side to side and from inner to outer pad on each corner?”

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.