IllustrationENGAGE IN REVERSE, VEHICLE SUDDENLY ACCELERATED OUT OF CONTROL, RESULTING IN TOTALLED VEHICLE. TT
1985 Oldsmobile 98
Owner reports · Recalls · Investigations
Limited comparison data
There is not enough comparable history to draw a useful model-year comparison.
About this comparison →How this year compares
Owner complaints by model year
Compare all 98 years →Counts vary with age, sales and reporting. They are not failure rates.
What owners reported most
Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
Limited mileage data: 0 of 9 reports include usable mileage. There isn’t enough coverage to show a useful chart.
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
- Steering. Review the 5 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Vehicle Speed Control. Review the 2 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
- Power Train. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
1 crash reports1 fire reports1 injury reports
Vehicle Speed Control complaints
2 reportsCRUISE CONTROL FAILURE. TT
Official recalls
184V063000 · Equipment:other:labels
May 21, 1984
OMISSION OF THE CERTIFICATION LABELS AS REQUIRED BY FEDERAL MOTOR VEHICLE SAFETY STANDARD NUMBER 110 "TIRE SELECTION AND RIMS".
Consequence & remedy
Consequence: Not supplied
Remedy: DEALER WILL INSTALL REQUIRED CERTIFICATION LABELS.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
5C89001 · Throttle NON-RETURN
Opened Mar 6, 1989 · Closed Jan 16, 1990
Status: closed (inferred from source dates) · Vehicle Speed Control:linkages
There is no summary currently available
EA88031 · Sudden Acceleration
Opened Apr 22, 1988 · Closed Oct 23, 1989
Status: closed (inferred from source dates) · Vehicle Speed Control:linkages
STATUS:ANALYSIS OF INFORMATION FROM THE MANUFACTURER IS IN PROGRESS.HOWEVER, NEITHER NHTSA OF GM HAS IDENTIFIED A FAILURE OR MALFUNCTION THATCOULD RESULT IN UNINTENDED ACCELERATION.SOME VEHICLES IN THIS GROUP WEREFOUND POTENTIALLY SUBJECT TO THROTTLE CABLE RESTRICTIONS, AND WERERECALLED ALONG WITH H CARS WITH SIMILAR PROBLEMS.INVESTIGATION ISCONTINUING.===
EA88019 · Hydro Boost
Opened Jan 28, 1988 · Closed Oct 31, 1990
Status: closed (inferred from source dates) · Steering
There is no summary currently available
PE87038 · Hydroboost Failure
Opened Jul 9, 1987 · Closed Jan 28, 1988
Status: closed (inferred from source dates) · Steering
SUBJECT VEHICLES:CAPRICE, CAPRICE CLASSIC, CUSTOM CRUISER, DEVILLE,ELECTRA, ESTATE WAGON, FLEETWOOD, LESABRE, NINETY-EIGHT, PARISIENNE,PARK AVENUE.(ALL 1984-86 GM VEHICLES EQUIPPED WITH HYDROBOOST II SYSTEMS)ANALYSIS:CONSUMER COMPLAINTS ALLEGE SEVERAL PROBLEMS INVOLVING THE POWERSTEERING AND POWER BRAKE SYSTEMS OF THESE VEHICLES.THESE PROBLEMSINCLUDE: POWER STEERING FLUID LOSS, POWER BRAKE FLUID LOSS, LEAKAGE FROMTHE HYDRO-BOOST II POWER BRAKE BOOSTER, BROKEN BOOSTER SEALS, AND MASTERCYLINDER FAILURE.ALL PROBLEMS SEEM TO BE RELATED TO THE HYDRO-BOOST IIPOWER ASSIST SYSTEM, IN WHICH THE WORKING FLUID PROVIDES POWER ASSIST TO BOKE BOOSTER.THE EFFECT OF THESE PROBLEMS COULD BE A LOSS OF STEERINGCONTROL AND/OR BRAKE EFFECTIVENESS.STATUS:THE VOLUMINOUS AMOUNT OF DATA SUPPLIED BY GM IS PRESENTLY BEING CODED BY A CONTRACTOR AND SHOULD BE COMPLETED BY 12/30/87. GM DATA INDICATED A 50% WEIBULL DISTRIBUTION FAILURE AT 50K MILES FOR THE PISTON PUSH-ROD SEAL. THIS PE LOOKS TO HAVE AN EXTRODINARILY HIGH FREQUENCY, ALTHOUGH THE SEVERITY APEARS TO BE LOW.SHOULD BE INTERESTING DISCUSSING THIS FOR UPGRADE/CLOSURE.===
EA86025 · Windshield Wipers
Opened Aug 25, 1986 · Closed Mar 2, 1988
Status: closed (inferred from source dates) · Visibility
SUMMARY:GM BELIEVES THE PROBLEM HAS BEEN CORRECTED THROUGH ITS PUBLI-CATION OF 7 SERVICE BULLETINS CONCERNING THIS MATTER. IN ADDITION, GMDOES NOT BELIEVE WINDSHIELD WIPER FAILURE REPRESENTS A SAFETY HAZARD.ANALYSIS: THREE FAILURE MODES HAVE BEEN IDENTIFIED; INSULATING FILM MAYBUILD UP BETWEEN THE BRUSH FACE AND THE COMMUTATOR OF THE WIPER MOTOR,CORROSION MAY FORM IN THE WIPER MOTOR BRUSH AND DISENGAGEMENT OF THEWIPER ARMS MAY OCCUR. IN VIEW OF THE EXISTING LEGAL PRECEDENT, THE LARGENUMBER OF WARRANTY CLAIMS CONCERNING WIPER MOTOR FAILURES (114,000) ANDTHE HIGH WIPER MOTOR AND MOTOR KIT PART SALES (251,000), IT IS IMPERATIVETHAT THIS MATTER RECEIVE MANAGEMENT SUPPORT.STATUS: GM RESPONSE DATED 2/23/87. ANALYZING AS TIME PERMITS.EA CLOSED 3/2/88.=== D@