Investigations
WHEEL STUD FRACTURE
NHTSA Preliminary Evaluation PE02085 - closed, opened 2002-11-18 and involving the FORD WINDSTAR.
NHTSA investigation PE02085 is a Preliminary Evaluation opened on 2002-11-18 and currently closed. The subject of record is FORD WINDSTAR, which places this file inside the Office of Defects Investigation queue for FORD. Latest activity on this investigation was logged on 2003-04-10 - NHTSA updates that field whenever an Information Request goes out, a supplement is filed, or a status change is recorded in the public docket.
A Preliminary Evaluation like PE02085 is the entry point of the federal defect-investigation process. NHTSA engineers scan complaint databases, field reports, and manufacturer data to decide whether an Engineering Analysis is warranted, whether a voluntary recall is already sufficient, or whether the pattern does not rise to a defect finding.
Investigators summarized the matter as follows: "ANALYSIS OF ODI AND FORD DATA HAS IDENTIFIED 1619 INCIDENTS OF WHEEL STUD FRACTURE IN MY 1998 THROUGH 2000 FORD WINDSTAR VEHICLES, INCLUDING 69 WHEEL SEPARATIONS AND 11 CRASHES. FORD HAS NOT BEEN ABLE TO IDENTIFY ANY DES..." Investigations are the early-warning layer of the federal auto-safety system, sitting upstream of formal recalls and defect orders. Whether this one closes without action or escalates into an Engineering Analysis, the full history stays in the ODI archive so researchers, litigators, and buyers can pull the paper trail at any time. Related FORD files, listed below, give context on whether this is an isolated concern or part of a broader pattern across the brand.
Investigation Summary
ANALYSIS OF ODI AND FORD DATA HAS IDENTIFIED 1619 INCIDENTS OF WHEEL STUD FRACTURE IN MY 1998 THROUGH 2000 FORD WINDSTAR VEHICLES, INCLUDING 69 WHEEL SEPARATIONS AND 11 CRASHES. FORD HAS NOT BEEN ABLE TO IDENTIFY ANY DESIGN OR MANUFACTURING DEFECTS IN ITS ANALYZIS OF THE PROBLEM. FORD MAINTAINS THAT THE FAILURES ARE CAUSED BY EITHER: (1) INADVERTENT OVERTORQUING OF LUG NUTS DURING REMOVAL OR INSTALLATION; OR (2) FATIGUE DUE TO INSUFFICIENT CLAMP LOAD BETWEEN THE WHEEL AND THE BRAKE ROTOR OR DRUM AND HUB ASSEMBLY. ACCORDING TO FORD, "CORROSION, DIRT, OR DAMAGE PRESENT ON THE ROAD WHEEL AT THE NUT INTEFACE" COULD CONTRIBUTE TO THE LATTER CONDITION. ANALYSIS OF ODI COMPLAINT DATA INDICATES THAT THE SUBJECT VEHICLES EXPERIENCE WHEEL STUD FAILURES AT SIGNIFICANTLY HIGHER RATES THAN PEER MINIVANS. THIS INVESTIGATION HAS BEEN UPGRADED TO FURTHER ASSESS THE FREQUENCY, SCOPE, AND TREND OF THE ALLEGED DEFECT CONDITION IN MY 1997 THROUGH 2000 WINDSTAR MINIVANS.
About This Investigation Type
A Preliminary Evaluation (PE) is the first phase of NHTSA's investigation process. It is opened when the agency identifies a potential safety defect pattern, usually triggered by consumer complaints, manufacturer reports, or field monitoring. During a PE, NHTSA gathers information to determine whether a formal engineering analysis is warranted.
Other FORD Investigations
Unintended Transmission Downshift and Rear Wheel Lock-up
Timing Belt Failure
Underbody shields detachment
B-Pillar Trim Detachment
Unintended Transmission Downshift and Rear Wheel Lock-up
Data from NHTSA Office of Defects Investigation. Cross-references: NHTSA recall campaign API and NHTSA FARS where fatality records overlap. PlainCars does not rate or recommend vehicles. about how PlainCars sources NHTSA data.
Read our methodology - how this data is sourced, computed, and verified.