Symptoms
- One wheel noticeably hotter than the others after driving
- Car may pull slightly toward the affected side
- Possible burning smell or reduced fuel economy from constant drag
Likely causes
- CommonCorroded or dry caliper slide pinsPins that can't move freely prevent the caliper from releasing evenly.
- CommonFailing caliper piston sealInternal wear can prevent the piston from retracting after braking.
- PossibleRusted or seized caliper bracketMore common in areas with road salt and older vehicles.
- Less commonCollapsed brake hose trapping pressureActs like a one-way valve, letting fluid in but not out.
What to do
- Feel each wheel for excess heat after a short, normal drive (carefully, since they can be hot).
- Check if the car pulls slightly to one side when braking or accelerating.
- Note any burning smell after driving, especially on one side.
- Have a mechanic inspect the suspected caliper's slide pins, piston, and bracket.
- Have the caliper cleaned, rebuilt, or replaced depending on what's found.
- Have the brake hose checked if the caliper itself tests fine but still doesn't release properly.
Tools and parts
Brake caliperSearch: “brake caliper for your car make and model”
When to call a pro
See a mechanic to inspect and repair the sticking caliper before it causes more significant pad or rotor damage.
Safety
Use caution
A dragging caliper can overheat the wheel and brake fluid, potentially reducing braking performance; get it checked soon rather than continuing to drive normally.