Overheating disc brake caliper

What NHTSA investigated

The ea was opened to gain a technical understanding of the causes for one or more disc brake calipers on a subject vehicle to suffer severe overheating. The overheating caused brake drag, melting ABS sensors, smoking, brake lining fires, and in some cases boiling brake fluid resulting in diminished stopping capability.based on testing, warranty and complaint data analysis, field trips and interviews with owners, mechanics and service managers, odi believes the likely cause of the alleged defect is water swell of the phenolic caliper piston and subsequent failure of the piston to fully return after the pedal is released.a technical report is attached with full details.

Recalls that followed

1. Newmar — Service Brakes, Hydraulic09V21700011 June 20092,578 vehicles
2. Four Winds — Service Brakes, Hydraulic09V20400010 June 2009684 vehicles
3. Airstream — Service Brakes, Hydraulic09V20600010 June 20096 vehicles
4. Georgie Boy — Service Brakes, Hydraulic: Fluid09V1930002 June 20092,555 vehicles
5. Fleetwood — Service Brakes, Air09V1980002 June 2009509 vehicles
6. Winnebago — Service Brakes, Hydraulic09V18600028 May 20090 vehicles
7. Workhorse — Service Brakes, Hydraulic09V1100003 April 200948,876 vehicles

Vehicles covered

Source

From NHTSA’s investigation file, rebuilt daily. To report a problem with your own vehicle, go to nhtsa.gov/report-a-safety-problem. All open investigations.