Brakes - Front Brakes Thumping/Knocking/Pulsation

NUMBER: 05-001-03 Rev. A

GROUP: Brakes

DATE: Aug. 1, 2003

THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 05-001-03, DATED JAN. 31, 2003, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDES AN ADDITIONAL MODEL YEAR.

SUBJECT:
Front Brake Sound And/Or Pulsation

MODELS:

2003 - **2004** (LH) 300M/Concorde/Intrepid
2003 - **2004** (LH) LHS (International Market)

NOTE:
This bulletin applies to vehicles with less than 1000 miles (1600 kilometers).

DISCUSSION:

A pulsation and/or thumping/popping/knocking sound may come from the front brakes when stopping. These symptoms may be caused by an uneven application of corrosion protection material to the front brake rotors during the manufacturing process. Usually the corrosion protection material unevenness is removed through normal break-in driving.

CAUTION:
Drive the vehicle in an area appropriate for the maneuvers described below.

To correct the above symptom(s) for vehicles that have accumulated less than 1000 miles (1600 kilometers) ,the vehicle should be driven at 30 mph (50 kph) and the brakes applied medium hard to come to a full stop.

NOTE:
Do not apply the brakes hard enough to activate the Antilock Brake System (ABS) if so equipped or skid the tires.

Drive the vehicle at 30 mph (50 kph) again for one minute to cool the brakes then apply the brakes medium hard again. Evaluate the sound/pulsation. Repeat the one minute drive and medium hard stop routine until the sound/pulsation is eliminated. If after twenty brake applications the sound/pulsation still exists, refer to the appropriate service information for front rotor refinishing procedures.

POLICY:
Information Only