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1998 Cadillac Deville

Owner reports · Recalls · Investigations

More warning signs than most Deville years

Owner complaints for the 1998 Cadillac Deville are substantially higher than the model-year median of 44.

About this comparison →

When problems were reported

Mileage at the reported incident

69 reports with mileage · 168 unknown

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.

  • Exterior Lighting. Review the 43 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Air Bags. Review the 34 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
  • Engine And Engine Cooling. Review the 33 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →

NHTSA owner reports · September 18, 2026 snapshot.

14 crash reports1 fire reports14 injury reports

What owners actually said

237 reports
Mileage unknown · Apr 24, 2001
Service Brakes, Hydraulic

FRONT ROTORS IN ABS BRAKE SYSTEM ARE WARPING. HE HAS TAKEN VEHICLE DEALERSHIP THREE TIMES FOR THIS PROBLEM, AND THEY WERE NOT OF THE OPINION THAT ROTORS WERE WARPED BAD ENOUGH FOR REPAIRS. PLEASE PROVIDE ANY ADDITIONAL INFORMATION/ATTACHMENTS.*AK

NHTSA ODI #886671

Mileage unknown · Apr 24, 2001
Suspension

VEHICLE IS SWAYING/FLOATING, AND BOUNCING DURING OPERATION AT HIGHWAY SPEEDS - WHICH IS CAUSING DIFFICULTY MAINTAINING A STRAIGHT PATH. DEALERSHIP REPLACED FRONT STRUTS, AND ALL OF THE REAR SUSPENSION COMPONENTS, INCLUDING SWAY BARS. VEHICLE WAS STILL EXPERIENCING CONTROL PROBLEMS. PLEASE PROVIDE ANY ADDITIONAL INFORMATION/…

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VEHICLE IS SWAYING/FLOATING, AND BOUNCING DURING OPERATION AT HIGHWAY SPEEDS - WHICH IS CAUSING DIFFICULTY MAINTAINING A STRAIGHT PATH. DEALERSHIP REPLACED FRONT STRUTS, AND ALL OF THE REAR SUSPENSION COMPONENTS, INCLUDING SWAY BARS. VEHICLE WAS STILL EXPERIENCING CONTROL PROBLEMS. PLEASE PROVIDE ANY ADDITIONAL INFORMATION/ATTACHMENTS.*AK

NHTSA ODI #886670

Mileage unknown · Apr 17, 2001
Air Bags

CADILLAC ISSUED A SAFETY RECALL FOR 1998 & 1999 SEDAN DEVILLES IN SEPT. 2000 RELATING TO THE POSSIBLE UNINTENDED ACTIVIATION OF THE DRIVER'S AND PASSENGER SIDE AIR BAGS AND THE RISK OF INJURY OR DEATH AS A RESULT. I PURCHASED A '98 SEDAN DEVILLE ON OCT. 6, 2000 AND THE ETTLESON CADILLAC SALESMAN AT NO TIME TOLD ME THE VEHICLE WA…

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CADILLAC ISSUED A SAFETY RECALL FOR 1998 & 1999 SEDAN DEVILLES IN SEPT. 2000 RELATING TO THE POSSIBLE UNINTENDED ACTIVIATION OF THE DRIVER'S AND PASSENGER SIDE AIR BAGS AND THE RISK OF INJURY OR DEATH AS A RESULT. I PURCHASED A '98 SEDAN DEVILLE ON OCT. 6, 2000 AND THE ETTLESON CADILLAC SALESMAN AT NO TIME TOLD ME THE VEHICLE WAS SUBJECT TO A SAFETY RECALL AND THAT WE MIGHT BE IN DANGER DRIVING THE CAR. UNTIL THE SENSOR MODULES WERE REPLACED. I DROVE 1,200 MILES BACK TO COLORADO AND DID NOT LEARN OF THE DANGER UNTIL TWO WEEKS LATER THROUGH ARTICLES IN THE NEW YORK TIMES AND WALL STREET JOURNAL. WHEN I WROTE THE SALESMAN ASKING WHY HE DID NOT WARN ME HE DECLARED--HARD TO BELIEVE--THAT HE WAS UNAWARE OF ANY SAFETY RECALL. (I WOULD NOT HAVE BOUGHT THE CAR IN THAT CONDITION, OF COURSE, AND HE PROBABLY REALIZED THAT.) WHEN I WROTE ETTLESON'S GENERAL MANAGER, LARRY SMOLINSKI, TO COMPLAIN ABOUT HIS DEALERSHIP SELLING A DEFECTIVE VEHICLE WITHOUT WARNING ME OF THE POSSIBLE DANGER, SMOLINSKI DID NOT BOTHER TO REPLY TO MY LETTER. HOW WOULD A GOVERNMENT AGENCY RESPOND IF WALMART WERE TO SELL TOASTERS THAT WERE A KNOWN FIRE HAZARD AND NOT EVEN WARN ITS CUSTOMERS? IF A RECALL WERE ORDERED FOR A DANGEROUS TOY COULD TOYS R US CONTINUE TO SELL IT? THIS DEALERSHIP SHOULD BE REPRIMANDED BY YOUR AGENCY FOR THIS DANGEROUS PRACTICE. *AK

NHTSA ODI #744179

Mileage unknown · Apr 8, 2001
Tires

RIGHT REAR GOODYEAR CONQUEST TIRE, SERIAL NUMBER M6XOEDWR447, EXPLODED DISINTEGRATING THE RIGHT REAR SPLASH GUARD, ESTIMATED DAMAGE $195.00 PLUS $125.00 FOR THE REPLACEMENT TIRE. TIRES WERE NOT ORIGIANAL EQUIPMENT AND PLENTY OF TREADWARE REMAINING. PER THE GOODYEAR MECHANIC, THE FOLLOWING TOOK PLACE WITHIN 10 MILES AND LESS TH…

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RIGHT REAR GOODYEAR CONQUEST TIRE, SERIAL NUMBER M6XOEDWR447, EXPLODED DISINTEGRATING THE RIGHT REAR SPLASH GUARD, ESTIMATED DAMAGE $195.00 PLUS $125.00 FOR THE REPLACEMENT TIRE. TIRES WERE NOT ORIGIANAL EQUIPMENT AND PLENTY OF TREADWARE REMAINING. PER THE GOODYEAR MECHANIC, THE FOLLOWING TOOK PLACE WITHIN 10 MILES AND LESS THAN 20 MINUTES: I PICKED UP A NAIL, THREW THE NAIL WHICH ALLOWED THE AIR TO ESCAPE, WHEN THE TIRE PRESSURE BECAME TOO LOW THE TIRE CAME OFF THE RIM AND EXPLODED. I PULLED OVER TO THE SHOULDER OF THE ROAD DUE TO THE EXTREMELY LOUD NOISE THAT OCCURRED WHEN THE TIRE EXPLODED. DESPITE WHAT THE GOODYEAR DEALER OR GOODYEAR CUSTOMER SERVICE SAID IN THEIR REPONSE TO MY E-MAIL, I BELIEVE THERE IS SOMETHING WRONG WITH THIS TIRE AND SHOULD NOT HAVE HAD TO PAY FULL PRICE FOR THE REPLACEMENT. I AM OBTAINING INFORMATION ON FILING A CLAIM AND WILL FILE ONE ONCE IT IS RECEIVED. I HAVE PICTURES OF THE EXPLOSION RESULT. MY OFFICE E-MAIL, ALL LOWERCASE LETTERS IS: WEINGARL@BRAGG.ARMY.MIL. *AK (TIRESIZE: P22560R16)( DOT NUMBER: TIRE SIZE: P22560R16 )

NHTSA ODI #743731

Mileage unknown · Apr 2, 2001
Tires

THE TIRES ON THE CAR BEGAN TO LOSE AIR PRESSURE IN A SHORT PERIOD OF TIME - ABOUT EVERY TWO WEEKS SEVERAL OF THE TIRES WOULD LOSE OVER 15 LBS PRESSURE. I WOULD REFILL THE TIRES TO THE PROPER PRESSURE - THAN IN THE MONTH OF MARCH 01 I WAS DRIVING ONA SMOOTH ROAD WHEN THE CAR BEGAN TO FEEL MUSHY - I STIPPED AT A FILLING STATION A…

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THE TIRES ON THE CAR BEGAN TO LOSE AIR PRESSURE IN A SHORT PERIOD OF TIME - ABOUT EVERY TWO WEEKS SEVERAL OF THE TIRES WOULD LOSE OVER 15 LBS PRESSURE. I WOULD REFILL THE TIRES TO THE PROPER PRESSURE - THAN IN THE MONTH OF MARCH 01 I WAS DRIVING ONA SMOOTH ROAD WHEN THE CAR BEGAN TO FEEL MUSHY - I STIPPED AT A FILLING STATION AND DISCOVERED THE REAR TIRE WAS NEARLY FLAT. I DECIDED TO PURCHASE NEW TIRES AND WENT TO A TIRE SHOP AND AS THEY DISMOUNTED THE TIRE WHICH WAS NEARLY FLAT THE PROBLEM WAS DISCOVERED - SEVERE CORROSION OF THE INNER RIM BETWEEN THE CHROM AND THE STEEL - THE SURFACE WAS SO ROUGH THAT THE TIRE SHOP REFUSED TO INSTALL NEW TIRES ON THE WHEELS AND STATED THAT THEY WERE TOO CORODED TO BE CLEANED. I WENT TO MY CADILLAC DLR TO HAVE THE WARRANTY PERFORMED TO REPLACE THE CORODED RIMS - I LEFT THE CAR FOR THE SERVICE. TE SAME DAY THE SERVICE DEPARTMENT CALLED STATING THE CAR WAS READY AND THAT FOUR NEW RIMS WERE INSTALLED ON THE CAR WITH THE ORIGINAL TIRES. I PICKED THE CAR UP AFTER HOURS AND NOTICED THAT THE WHEELS WERE NOT NEW BUT PERHAPS WERE USED BUT IN GOOD CONDITION. I REVIEWED MY INVOICE FOR THE WARRANTY WORK AND FOUND THAT THE WHEELS WERE NOT REPLACED BUT MERELY CLEANED AND REINSTALLED ON MY CAR. THE CORROSION WILL CONTINUE AND AT SOME POINT WILL DEFLATE MY TIRES - THIS TIME PERHAPS AT A HIGHER SPEED. UT SOME LOST AIR FASTER THAN OTHERS. WHILE DRIVING ON A SMOOTH ROAD I NOTICED. *AI

NHTSA ODI #743447

Mileage unknown · Mar 26, 2001
Service Brakes, HydraulicSuspension

STABALIZER LIGHT COMES ON AND CAUSES VEHICLE TO SLOW DOWN AND VEHICLE EXPERIENCES ERRATIC PERFORMANCE OF BRAKES , IT ALSO EFFECTS WHOLE FRONT END OF VEHICLE. PLEASE PROVIDE FURTHER INFORMATION.*AK

NHTSA ODI #884117

Mileage unknown · Mar 5, 2001
Seats

INTERMITTENTLY DRIVER'S SEATBACK WILL COLLAPSE WHILE DRIVING. DEALER HAS NOT BEEN ABLE TO DUPLICATE PROBLEM.*AK

NHTSA ODI #882067

Mileage unknown · Feb 18, 2001
Exterior Lighting

HEADLIGHT LENSES HAVE FALLEN OUT OF BOTH HEADLIGHTS OF THE SUBJECT VEHICLE. THE LEFT HEADLIGHT ASSEMBLY WAS REPLACED BY MY DEALER, NEAL NORTON CADILLAC, AT MY EXPENSE. WHE THE RIGH LENSE FAILED, THE FAILURE WAS IDENTIFIED BEFORE THE LENS WAS LOST, AND I REATTACHED THE LENSE USING LIQUID NAILS ADHESIVE. THIS REPAIR HAS WORKED …

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HEADLIGHT LENSES HAVE FALLEN OUT OF BOTH HEADLIGHTS OF THE SUBJECT VEHICLE. THE LEFT HEADLIGHT ASSEMBLY WAS REPLACED BY MY DEALER, NEAL NORTON CADILLAC, AT MY EXPENSE. WHE THE RIGH LENSE FAILED, THE FAILURE WAS IDENTIFIED BEFORE THE LENS WAS LOST, AND I REATTACHED THE LENSE USING LIQUID NAILS ADHESIVE. THIS REPAIR HAS WORKED THUS FAR, BUT I AM CONCERNED THAT THE LENSE WILL FALL OUT AGAIN. NEITHER MY DEALER, NOR CADILLAC ACKNOWLEDGE THIS TO BE A MANUFACTURING QUALITY AND RELIABILITY ISSUE. THEY HAVE BOTH ARGUED THE HEADLIGHT LENSES ARE TRIM. TO THE CONTRARY, I CONSIDER THE LENSES TO BE AN IMPORTANT ELEMENT IN THE SAFETY OF MY VEHICLE. IF I WERE TO DRIVE THE VEHICLE WITHOUT THE LENSES IN PLACE, I BELIEVE THE HEADLIGHTS WOULD SOON FAIL. THIS WOULD MOST LIKELY HAPPEN WHEN THE VEHICLE WAS BEING DRIVE, ENDANGERING BOTH THOSE WITHIN THE VEHICLE AND OTHERS NEAR THE VEHICLE. I SEE AT LEAST ONE OTHER SUCH FAILURE REPORTED IN YOUR PROBLEM LIST FOR THIS MAKE, MODEL AND YEAR VEHICLE. I BELIEVE THAT AS THE AGE OF THIS FLEET OF VEHICLES INCREASES, YOU WILL SEE MORE SUCH FAILURE AND THAT IT IS ONLY A MATTER OF TIME BEFORE THIS FAILURE RESULTS IN AN INJURY OF DEATH. I BELIEVE A FULL INVESTIGATION IS NEEDED, AND I BELIEVE THAT SUCH AN INVESTIGATION WILL FIND THAT A RECALL IS IN ORDER. I WILL BE HAPPY TO DISCUSS THIS SERIOUS SAFETY PROBLEM IN MORE DETAIL WITH YOUR ORGANIZATION.

NHTSA ODI #741087

Mileage unknown · Feb 6, 2001
Air BagsCrashInjury

WAS TRAVELING 25MPH OR HIGHER ON A KENTUCKY ROAD FAILED TO MAKE A CURB, AND VEHICLE SLID ON A PATCH OF ICE. HIT A ROCK HARD , JUMPED INTO A DITCH. AIR BAGS FAILED TO DEPLOY. WAS IN DITCH FOR 12 HOURS. VEHICLE WAS LAYING ON ITS SIDE. DRIVER SUSTAINED A CRACKED ELBOW. *AK

NHTSA ODI #879973

Mileage unknown · Feb 6, 2001
Exterior Lighting

HEADLIGHT LENS ADHESIVE DEFECTIVE. MOISTURE CAUSES LIGHT FAILURE. *AK

NHTSA ODI #740538

Official recalls

3

00V217000 · Air Bags:side/window

Aug 11, 2000

VEHICLE DESCRIPTION: PASSENGER VEHICLES. SOME OF THE SIDE IMPACT SENSOR MODULES HAVE QUALITY PROBLEMS THAT CAN CAUSE AN INADVERTENT DEPLOYMENT OF THE DRIVER OR PASSENGER SIDE IMPACT AIR BAGS. THESE SIDE AIR BAGS DEPLOY WITH LESS FORCE THAN A FRONTAL AIR BAG AND ARE DESIGNED TO MINIMIZE THE RISK OF SERIOUS INJURY.

Consequence & remedy

Consequence: HOWEVER, AN OCCUPANT CAN RECEIVE SOME INJURY FROM A DEPLOYMENT.

Remedy: DEALERS WILL REPLACE THE DRIVER AND PASSENGER SIDE IMPACT SENSING MODULES. IF THE VEHICLE HAS HAD THE SIDE AIR BAGS TEMPORARILY DISCONECTED, THE TEMPORARY DISCONNECT WILL BE REMOVED BEFORE REPLACING THE SIDE IMPACT SENSING MODULES.

97V232000 · Structure:body:hood:hinge And Attachments

Dec 18, 1997

VEHICLE DESCRIPTION: PASSENGER VEHICLES. THESE VEHICLES WERE BUILT WITH HOOD HINGE PIVOT BOLTS WHICH CAN BREAK DUE TO AN IMPROPER HEAT TREAT CONDITION. THIS DOES NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 219, "WINDSHIELD ZONE INTRUSION." A BROKEN BOLT CAN CAUSE EITHER THE CORNER OF THE HOOD NEAR THE WINDSHIELD TO RAISE, OR ONE SIDE OF THE HOOD TO BE UNSTABLE WHEN OPENED.

Consequence & remedy

Consequence: IN THE EVENT OF A VEHICLE CRASH, THE HOOD COULD BE PUSHED BACK THROUGH THE WINDSHIELD GLASS POSSIBLY INJURING THE VEHICLE OCCUPANTS.

Remedy: DEALERS WILL REPLACE THE HOOD HINGE PIVOT BOLTS.

97V183000 · Vehicle Speed Control

Oct 27, 1997

VEHICLE DESCRIPTION: PASSENGER VEHICLES, HEARSES AND LIMOUSINES. THE CANISTER PURGE EVAPORATIVE EMISSIONS HARNESS ON THESE VEHICLES WAS MISROUTED.

Consequence & remedy

Consequence: THE HARNESS COULD INTERFERE WITH THE CRUISE CONTROL AND THROTTLE LINKAGE PREVENTING RETURN TO A CLOSED THROTTLE.

Remedy: DEALERS WILL INSPECT THE VEHICLE FOR PROPER ROUTING OF THE HARNESS, CORRECT AS NECESSARY, AND INSTALL A PLASTIC TIE STRAP TO THE HARNESS.

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

3

RQ03001 · Power Rack And Pinion Steering Failure

Opened Jan 2, 2003 · Closed Sep 15, 2003

Status: closed (inferred from source dates) · Steering; Steering:rack And Pinion

GM CONDUCTED A SAFETY RECALL (NHTSA # 02V286) TO ADDRESS A STEERING DEFECT PERTAINING TO A LOWER PINION BEARING (LPB) WITHIN THE RACK AND PINION STEERING GEAR (R&P). THE RECALL COVERED 1,159,156 MODEL YEAR 1997-1998 PONTIAC GRAND PRIX VEHICLES BUILT BETWEEN MARCH 1, 1996 AND OCTOBER 31, 1997, 1996-1998 PONTIAC TRANS SPORT, CHEVROLET LUMINA APV, CHEVROLET VENTURE, OLDSMOBILE SILHOUETTE MINIVANS, AND CHEVROLET CAVALIER AND PONTIAC SUNFIRE SEDANS BUILT BETWEEN JANUARY 1, 1996 AND OCTOBER 31, 1997.ODI OPENED THIS RQ AFTER RECEIVING REPORTS THAT OTHER VEHICLES WERE EXHIBITING THE SAME SYMPTOMS AS THE RECALLED VEHICLES.BASED ON ODI'S REVIEW OF TECHNICAL AND COMPLAINT DATA COLLECTED DURING THE RQ, THE W-CARS ARE ASSOCIATED WITH EITHER A HIGHER STEERING COMPLAINT RATE OR A HIGHER LPB FAILURE RATE THAN THE OTHER VEHICLES INVESTIGATED UNDER THE RQ AND ARE ABOVE OR NEAR THE RATES FOR THE RECALLED VEHICLES.THUS, ODI WILL FURTHER EXAMINE THE W-CARS (1996-1997 OLDSMOBILE CUTLASS SUPREME, 1996-1998 BUICK REGAL, CHEVROLET LUMINA, CHEVROLET MONTE CARLO, 1997-1998 BUICK CENTURY, AND 1998 OLDSMOBILE INTRIGUE) UNDER A NEW INVESTIGATION, ENGINEERING ANALYSIS (EA)03-019.

Additional source detail variants (2)

Steering

GM CONDUCTED A SAFETY RECALL (NHTSA # 02V286) TO ADDRESS A STEERING DEFECT PERTAINING TO A LOWER PINION BEARING (LPB) WITHIN THE RACK AND PINION STEERING GEAR (R&P). THE RECALL COVERED 1,159,156 MODEL YEAR 1997-1998 PONTIAC GRAND PRIX VEHICLES BUILT BETWEEN MARCH 1, 1996 AND OCTOBER 31, 1997, 1996-1998 PONTIAC TRANS SPORT, CHEVROLET LUMINA APV, CHEVROLET VENTURE, OLDSMOBILE SILHOUETTE MINIVANS, AND CHEVROLET CAVALIER AND PONTIAC SUNFIRE SEDANS BUILT BETWEEN JANUARY 1, 1996 AND OCTOBER 31, 1997.ODI OPENED THIS RQ AFTER RECEIVING REPORTS THAT OTHER VEHICLES WERE EXHIBITING THE SAME SYMPTOMS AS THE RECALLED VEHICLES.BASED ON ODI'S REVIEW OF TECHNICAL AND COMPLAINT DATA COLLECTED DURING THE RQ, THE W-CARS ARE ASSOCIATED WITH EITHER A HIGHER STEERING COMPLAINT RATE OR A HIGHER LPB FAILURE RATE THAN THE OTHER VEHICLES INVESTIGATED UNDER THE RQ AND ARE ABOVE OR NEAR THE RATES FOR THE RECALLED VEHICLES.THUS, ODI WILL FURTHER EXAMINE THE W-CARS (1996-1997 OLDSMOBILE CUTLASS SUPREME, 1996-1998 BUICK REGAL, CHEVROLET LUMINA, CHEVROLET MONTE CARLO, 1997-1998 BUICK CENTURY, AND 1998 OLDSMOBILE INTRIGUE) UNDER A NEW INVESTIGATION, ENGINEERING ANALYSIS (EA)03-019.

Steering:rack And Pinion

GM CONDUCTED A SAFETY RECALL (NHTSA # 02V286) TO ADDRESS A STEERING DEFECT PERTAINING TO A LOWER PINION BEARING (LPB) WITHIN THE RACK AND PINION STEERING GEAR (R&P). THE RECALL COVERED 1,159,156 MODEL YEAR 1997-1998 PONTIAC GRAND PRIX VEHICLES BUILT BETWEEN MARCH 1, 1996 AND OCTOBER 31, 1997, 1996-1998 PONTIAC TRANS SPORT, CHEVROLET LUMINA APV, CHEVROLET VENTURE, OLDSMOBILE SILHOUETTE MINIVANS, AND CHEVROLET CAVALIER AND PONTIAC SUNFIRE SEDANS BUILT BETWEEN JANUARY 1, 1996 AND OCTOBER 31, 1997.ODI OPENED THIS RQ AFTER RECEIVING REPORTS THAT OTHER VEHICLES WERE EXHIBITING THE SAME SYMPTOMS AS THE RECALLED VEHICLES.BASED ON ODI'S REVIEW OF TECHNICAL AND COMPLAINT DATA COLLECTED DURING THE RQ, THE W-CARS ARE ASSOCIATED WITH EITHER A HIGHER STEERING COMPLAINT RATE OR A HIGHER LPB FAILURE RATE THAN THE OTHER VEHICLES INVESTIGATED UNDER THE RQ AND ARE ABOVE OR NEAR THE RATES FOR THE RECALLED VEHICLES.THUS, ODI WILL FURTHER EXAMINE THE W-CARS (1996-1997 OLDSMOBILE CUTLASS SUPREME, 1996-1998 BUICK REGAL, CHEVROLET LUMINA, CHEVROLET MONTE CARLO, 1997-1998 BUICK CENTURY, AND 1998 OLDSMOBILE INTRIGUE) UNDER A NEW INVESTIGATION, ENGINEERING ANALYSIS (EA)03-019.

EA00004 · Inadvertent Of Side Impact Air Bag

Opened Feb 15, 2000 · Closed Sep 28, 2000

Status: closed (inferred from source dates) · Air Bags:side/window

There is no summary currently available

PE99061 · Inadvertent Deployment Of Side Air Bag

Opened Sep 27, 1999 · Closed Feb 15, 2000

Status: closed (inferred from source dates) · Air Bags:side/window

THIS SIDE IMPACT AIR BAG CAN INADVERTENTLY DEPLOY DUE TO A NUMBER OF ROOT CAUSED INCLUDING: ERRONEOUS ACCELERATION INPUTS OR FALSE ACTIVATION OF THE AIR BAG DEPLOYMENT ALGORITHM DUE TO AN ELECTRICAL MALFUNCTION IN THE SENSING AND DIAGNOSTIC MODULE (SDM); FALSE ACTIVATION RESULTING FROM AN ELECTRICAL SHORT IN THE SDM WIRING HARNESS; AND FALSE ACCELERATION INPUTS RESULTING FROM IMPROPER SDM INSTALLATION.IN EACH CASE, IT IS POSSIBLE FOR THE INADVERTENT DEPLOYMENT TO OCCUR WITHOUT WARNING.THE SCOPE OF THE ENGINEERING ANALYSIS IS EXPANDED TO INCLUDE MY 1997 DEVILLE VEHICLES.ODI HAS IDENTIFIED 253 REPORTS ALLEGING INADVERTENT DEPLOYMENT OF A SIDE IMPACT AIR BAG ON 1997-1999 CADILLAC DEVILLE VEHICLES.GM HAS MADE 8 MODIFICATIONS IN THE MANUFACTURING OR DESIGN OF THE SIDE IMPACT SYSTEM IN THE SUBJECT VEHICLES SOME OF WHICH ARE FOCUSED ON REDUCING THE POTENTIAL FOR AN ELECTRICAL SHORT.INADVERTENT DEPLOYMENT OF A SIDE IMPACT AIR BAG CAN RESULT IN UNWARRANTED INJURIES TO OCCUPANTS AND PRESENTS THE POTENTIAL FOR LOSS OF VEHICLE CONTOL. AN ENGINEERING ANALYSIS IS WARRANTED TO DETERMINE IF A POTENTIAL SAFETY DEFECT EXISTS.