Bosch Hydraulic Disc Brakes

What NHTSA is examining

On 4/1/09, Navistar notified NHTSA that it had decided certain Workhorse W22 series RV chassis, produced between July 24, 2000 and December 19, 2007, equipped with axles that include Bosch ZOPS or ZOHT pin slide hydraulic disc brakes were defective, and that the defect related to motor vehicle safety.Navistar stated vehicles whose use was occasional or seasonal, such as an RV, and which were equipped with these brakes may experience calipers sticking in the applied position.This can result in brake drag, abnormal heat generation, brake fluid boil, and extended stopping distances, increasing the risk of a crash.NHTSA assigned recall number 09V-110 to this recall.RMD mailed Bosch an IR letter on 4/23/09 requesting information about the defect, the affected customers, quantities shipped, and whether Bosch intended to file a Defect Report.On 5/7/09, Bosch responded stating that it did not agree with Navistar that a defect exists in the equipment, but a customer list was included and, with a confidentiality request, quantities sold to each company were included.Bosch listed 19 companies as receiving the subject hydraulic disc brakes.RMD mailed these 19 companies IR letters on 5/20/09.1 letter, to Athey Products, was undeliverable.17 companies responded with various statements, mostly claiming that their vehicle applications were not similar to recreational vehicles, or that they do not have warranty data pointing to a possible defect, or that the company is only a parts…

Vehicles under investigation