Chrysler says that some 2006-08 Jeep Commanders built before October 1, 2007, may produce a rattling sound from the glove box area when the blower motor is operating. One likely cause for the noise, said the manufacturer, is leaves, pine needles and other debris making its way into the blower motor housing. A deformed air door baffle screen is the true culprit. Replacing the baffle screen with a revised design, part No. 55037760AE, and cleaning out the housing should eliminate the noise.
Some 2004-05 Mazda3 models may produce a squeak or grind from the rear brakes when coming to a stop. Mazda says the noise can occur in either Drive or Reverse, and attributes it to stick/slip condition between the rear brake pads and rotors. Machining the rotors and installing revised rear pads with a new friction formulation, part No. B3YP-26-48Z, should eliminate the brake noise.
Drivers of 1999-2000 Explorer SUVs with 4.0-liter engines may come into your store with a complaint of a buzzing noise or vibration from the accelerator pedal while driving. One likely cause, Ford said, is normal engine vibrations being transmitted into the pedal via the accelerator cable. Replacing the cable with a new, longer version, part No. F87Z-9A758-KA, should eliminate the noise.
When installing the revised cable, attach it to the same plastic retaining clip as the original, ensuring the clip is positioned between the two foam sleeves. To make up for the extra length of the new cable and prevent it from vibrating against parts in the engine bay, secure the cable to the wiring harness at the back of the engine with a tie strap.
"Factory Fixes" is written by Jim DePalma, a 30-year veteran of the auto repair business who has served stints as a service manager, parts manager and ASE-certified technician. His column provides vehicle manufacturers' authentic factory technical service bulletins (TSBs) that have been condensed for easier reading. Mr. DePalma advises that techs always check with a dealer or repair information system for the latest revisions before starting to work on a vehicle. He can be reached via e-mail at [email protected].