NHTSA Office of Defects Investigation

Engineering Analysis EA03-004: WHEEL STUD FRACTURE

Closed

NHTSA's Office of Defects Investigation opened Engineering Analysis EA03-004 on April 10, 2003 and closed it on August 30, 2004. NHTSA's investigations file lists the 1997–2000 Ford Windstar for it.

Updated daily from NHTSA's investigations file

Key facts

NHTSA number: EA03-004 (also written EA03004)
Investigation type: Engineering Analysis A more detailed stage of a defect investigation, opened when NHTSA's Office of Defects Investigation decides an issue merits further review, often after a Preliminary Evaluation or a Recall Query; it can include vehicle testing, surveys and further information requests.
Status: Closed August 30, 2004
Opened: April 10, 2003
Closed: August 30, 2004
Vehicle or equipment manufacturer: Ford Motor Company
Components: Wheels; Wheels — Lugs/Nuts/Bolts/Studs
Vehicles and equipment: 1997–2000 Ford Windstar

A recall appears here only when NHTSA's investigations file links one to the investigation; NHTSA's summary or record can name others.

NHTSA's summary

As NHTSA's Office of Defects Investigation wrote it for Engineering Analysis EA03-004.

try.vin does not copy NHTSA's investigation documents; NHTSA's investigation record lists the ones NHTSA has published.

THE SUBJECT VEHICLES RANGE IN AGE FROM 4?7 YEARS IN SERVICE, WITH AVERAGE MILEAGES ESTIMATED TO RANGE FROM 50 TO 100 THOUSAND MILES.AT THESE MILEAGES, THE SUBJECT WHEELS ARE LIKELY TO HAVE BEEN REMOVED AND REINSTALLED MULTIPLE TIMES FOR VARIOUS SERVICE PROCEDURES.ODI IS CONCERNED ABOUT THE HIGH WHEEL SEPARATION RATES IN THE MY 1997-98 WINDSTAR VEHICLES EQUIPPED WITH ALUMINUM ALLOY WHEELS.HOWEVER, ANALYSIS OF FAILURE DATA INDICATES THAT MOST OF THE INCIDENTS IN THAT POPULATION OF VEHICLES OCCUR AFTER THE VEHICLES HAD ACCUMULATED 30 THOUSAND MILES OF SERVICE. THE FACTORS THAT INCREASE THE RISK THAT INADEQUATE CLAMP LOADS MAY BE ACHIEVED DURING SERVICE-RELATED WHEEL INSTALLATION ARE NOT UNIQUE TO THE SUBJECT VEHICLES.TESTING CONDUCTED BY FORD AND VRTC INDICATE THAT THE MY 1998 WINDSTAR ALUMINUM WHEEL FASTENING SYSTEM PERFORMS SIMILAR TO THE WHEEL FASTENING SYSTEMS ON PEER MINIVANS.NO DESIGN OR MANUFACTURING DEFECTS WERE IDENTIFIED IN THE WHEEL FASTENING SYSTEMS OF THE SUBJECT VEHICLES. FORD WILL SEND A MAILING TO OWNERS OF WINDSTAR VEHICLES WITH ALUMINUM WHEELS THAT HAVE HIGH WHEEL SEPARATION RATES THAT REVIEWS THE APPROPRIATE WHEEL FASTENING PROCEDURES AND STATES THAT THE WHEEL NUTS SHOULD BE TIGHTENED TO THE NOMINAL TORQUE, 100 FT-LBS (136 NM), AND RE-TIGHTENED TO THE SAME TORQUE AFTER 500 MILES.FORD?S LETTER ALSO STATES THAT IT IS ?A GOOD PRACTICE TO BE SURE THAT BEFORE INSTALLING THE WHEEL THE ALUMINUM WHEEL MOUNTING SURFACE, WHEEL LUG NUT AREA, AND THE MOUNTING FLANGE ARE FREE FROM DIRT, DEBRIS, AND LOOSE RUST TO ENSURE THE WHEEL IS SEATED CORRECTLY AND THE WHEEL LUG NUTS REMAIN FULLY TIGHTENED.? ODI WILL CONTINUE TO MONITOR THE INCIDENCE OF WHEEL FASTENER FAILURES IN THE SUBJECT VEHICLE POPULATION.ACCORDINGLY, THIS INVESTIGATION IS CLOSED.THE CLOSING OF THIS INVESTIGATION DOES NOT CONSTITUTE A FINDING BY NHTSA THAT A SAFETY-RELATED DEFECT DOES NOT EXIST.THE AGENCY WILL TAKE FURTHER ACTION IF WARRANTED BY THE CIRCUMSTANCES. FOR ADDITIONAL INFORMATION, SEE THE ATTACHED CLOSING REPORT.

Vehicles and equipment listed for this investigation

NHTSA's investigations file lists these vehicles and equipment for Engineering Analysis EA03-004. A listed model year means only that an investigation names it; it says nothing about any particular vehicle. Model years with a try.vin recall page link to that page's NHTSA investigations section.

Ford

Ford Windstar
- 1997, 1998, 1999, 2000

All Ford recalls

What an NHTSA investigation is

NHTSA's Office of Defects Investigation (ODI) looks into possible safety defects in vehicles and equipment, often after owner complaints. An investigation usually starts as a Preliminary Evaluation, or as a Recall Query when it concerns whether an existing recall covers the right vehicles or fixes the problem, and ODI can upgrade it to a more detailed Engineering Analysis. A Defect Petition asks NHTSA to open an investigation, and Audit and Equipment Queries are administrative investigations into whether companies complied with federal vehicle safety requirements, such as reporting, recall and certification rules.

An open investigation is not a finding that a safety defect exists, and NHTSA can close one without a recall.

To see whether a specific vehicle has an open recall, enter its VIN at nhtsa.gov/recalls.

Ford VIN check: decode a VIN to see its year, make and model.

Sources

NHTSA's investigation record for EA03-004

Investigation details come from NHTSA's investigations file, which try.vin imports once a day. The investigation types are described from the U.S. Department of Transportation Inspector General's May 2023 report on NHTSA's Office of Defects Investigation, NHTSA's petition rules (49 CFR Parts 552 and 557) and NHTSA's Office of Defects Investigation procedures. How try.vin reads NHTSA investigations.