NHTSA Office of Defects Investigation

Engineering Analysis EA06-009: TIMING CHAIN FAILURE - STALL

Closed

NHTSA's Office of Defects Investigation opened Engineering Analysis EA06-009 on June 6, 2006, the day it closed Preliminary Evaluation PE06-006, whose summary cites it, and closed it on November 9, 2007. NHTSA's investigations file lists the 2001 Saturn LS for it and links recall 07V-519 to it.

Updated daily from NHTSA's investigations file

Key facts

NHTSA number: EA06-009 (also written EA06009)
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 November 9, 2007
Opened: June 6, 2006
Closed: November 9, 2007
Vehicle or equipment manufacturer: General Motors, LLC
Component: Engine and Engine Cooling
Recall linked by NHTSA: 07V-519: ENGINE TIMING CHAIN, reported November 7, 2007
Vehicles and equipment: 2001 Saturn LS

NHTSA's summary

As NHTSA's Office of Defects Investigation wrote it for Engineering Analysis EA06-009.

IN A NOVEMBER 7, 2007 LETTER, GENERAL MOTORS (GM) NOTIFIED ODI THAT IT HAD DETERMINED THAT A SAFETY DEFECT EXISTED IN CERTAIN MODEL YEAR (MY) 2001 SATURN L-SERIES VEHICLES EQUIPPED WITH THE 2.2L 4-CYLINDER (L61) ENGINE BUILT FROM NOVEMBER 2000 THROUGH FEBRUARY 2001.

THE DEFECT COULD RESULT IN ENGINE STALL WHILE DRIVING WITH NO RESTART. GM WILL RECALL (07V-519) THE VEHICLES TO REPLACE THE TIMING CHAINS WITH REDESIGNED PARTS. DURING THIS ENGINEERING ANALYSIS GM AND ODI CONTACTED SATURN OWNERS THAT HAD WARRANTY WORK PERFORMED RELATED TO TIMING CHAIN REPLACEMENTS OR REPAIRS IN ORDER TO DETERMINE CERTAIN SAFETY CONSEQUENCES ASSOCIATED WITH TIMING CHAIN FAILURE.BASED ON ANALYSIS OF WARRANTY CLAIM VERBATIM TEXT FOR INDICATIONS OF STALL WHILE DRIVING (SWD) AND THE RESULTS FROM A SURVEY OF WARRANTY CLAIMS WITH AMBIGUOUS TEXT, GM ESTIMATED THAT 55% OF ALL TIMING CHAIN WARRANTY REPAIRS INVOLVED SWD INCIDENTS.ODI'S ANALYSIS ESTIMATED APPROXIMATELY 76% OF WARRANTY REPAIRS MAY HAVE INVOLVED A SWD.THE SURVEYS WERE ALSO USED TO ASSESS THE SAFETY CONSEQUENCES OF THE SWD INCIDENTS.THE CALLS FOUND THAT NONE OF THE VEHICLES THAT EXPERIENCING STALLS DUE TO TIMING CHAIN FAILURE COULD BE RESTARTED.INADDITION, APPROXIMATELY ONE-THIRD OF THE STALLS OCCURRED AT SPEEDS GREATER THAN 40 MPH AND ABOUT 20% INDICATED THAT THEY WERE NOT ABLE TO GET THE VEHICLE OUT OF TRAFFIC AFTER THE ENGINE DIED.GM'S STATISTICAL ANALYSES OF FAILURE DATA ESTIMATED STALL WHILE DRIVING RATES OF 1.7% AND 5.2% AT 3 AND 6 YEARS IN SERVICE.ODI'S ANALYSES ESTIMATED SLIGHTLY HIGHER RATES OF 2.3% AND 7.0% AT 3 AND 6 YEARS IN SERVICE. THIS ENGINEERING ANALYSIS IS CLOSED BASED ON GM'S RECALL.

Vehicles and equipment listed for this investigation

NHTSA's investigations file lists these vehicles and equipment for Engineering Analysis EA06-009. 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.

Saturn

Saturn LS
- 2001

All Saturn 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.

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

Sources

NHTSA's investigation record for EA06-009

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.