Problems · NHTSA complaints

2005 Cadillac STS problems

Owners filed 101 complaints about the 2005 Cadillac STS with NHTSA between Jun 2005 and Jan 2025. The most-cited component is electrical system (23).

Complaints
101
Filed with NHTSA
Crashes
13
Reported by owners
Fires
4
Reported by owners
Injuries
4
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Electrical system23
  2. Power train18
  3. Engine12
  4. Air bags11
  5. Engine and engine cooling7
  6. Seats6
  7. Vehicle speed control6
  8. Suspension5
  9. Service brakes5
  10. Fuel/propulsion system5
  11. Exterior lighting5
  12. Structure5
  13. Visibility5
  14. Steering4

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Nov 11, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
20057
20067
20077
20087
20097
20105
20117
20123
20135
201418
20156
20165
20173
20183
20197
20201
20210
20221
20231
20240
20251

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Electrical system

23 reports3 crashes3 fires
“WAS DRIVING LOW BEAM LIGHTS WENT OUT SMELLED WIRES BURNING LEFT SIDE WIRE HARNESS WAS MELTING I WAS ON MY WAY HOME ON HIGHWAY 51 NORTH AT AROUND D 10:45 IN THE EVENING”
Owner complaint to NHTSAFiled Jul 17, 2019Electrical system, Exterior lightingODI 11232841

Power train

18 reports2 crashes1 fire1 related recall
“The contact owns a 2005 Cadillac STS. The contact stated that while the vehicle was parked in the driveway, the contact became aware of a fluid leak. There was no warning light illuminated. The vehicle was driven to an independent mechanic where it was diagnosed with a pinion seal leak on the rear axle. The local dealer was contacted; however, the vehicle was not repaired because the vehicle was not under recall. The manufacturer was made aware of the failure. The failure mileage was approximately 92,721.”
Owner complaint to NHTSAFiled Jan 31, 2025Power trainODI 11639843

Engine

12 reports
“THE VEHICLE INTERMITTENTLY LOSES ENGINE/ ELECTRICAL POWER WHILE DRIVING. WHEN THE POWER LOSS OCCURS, BRAKES AND STEERING LOSE PROPER FUNCTIONALITY CREATING A THREAT TO THE DRIVER AND PASSENGERS AS WELL AS OTHER MOTORISTS. THE VEHICLE THEN IS UNRESPONSIVE TO THE PROPER STARTING PROCEDURE. RESTARTING THE VEHICLE IS INCONSISTENT. IT MAY START IMMEDIATELY UPON COMMAND OR IT MAY CAUSE A THEFT PROCEDURE TO INITIATE. THE VEHICLES DIC WILL POSSIBLY SHOW THE FOLLOWING PROMPTS JUST BEFORE THE SHUTDOWN FAILURE OCCURS; SERVICE VEHICLE SOON, SERVICE STABILITY SYSTEM SOON, SERVICE A/C SYSTEM SOON. DURING THE SHUTDOWN FAILURE, NO ELECTRICAL COMPONENTS ARE OPERABLE BUT POWER IS STILL AVAILABLE TO THE CAR ALLOWING THE DIC TO PROMPT 'NO FOB DETECTED' OR 'THEFT ATTEMPTED' AND THE FOB WILL INTERMITTENTLY ALLOW YOU TO SEND LOCK/ UNLOCK COMMANDS DURING THE SHUTDOWN FAILURE. THE FAILURE HAPPENS IN ANY SCENARIO AND IS INTERMITTENT IN THE ASPECT OF NO FAILURE OCCURS FOR A WEEK OR 5 FAILURES OCCUR IN A DAY. I CANNOT DETERMINE WHEN THE FAILURES BEGAN HAPPENING CONSIDERING I PURCHASED THE VEHICLE USED WITH 155000 MILES AND THE FAILURES HAVE BEEN HAPPENING SINCE DAY 3 OF MY OWNERSHIP. THE…”
Owner complaint to NHTSAFiled Aug 19, 2019Steering, Service brakes, EngineODI 11244847

Air bags

11 reports2 crashes
“THE SERVICE AIRBAG LIGHT IS NOW ON AND I NOTICE NUMEROUS OTHER COMPLAINTS FOR THIS VEHICLE INCLUDING INJURIES. CADILLAC DEALER SAYS THEY WISH TO CHARGE FOR DIAGNOSTICS AND BELIEVE IT IS A SEAT-BELT PRETENSIONER WHICH THEY WOULD NOT COVER. REPAIRS WOULD BE AS MUCH AS VEHICLE VALUE. I NOTICE A RECALL WAS ORDERED FOR VEHICLES ONE OR TWO YEARS NEWER WITH THE EXACT SAME ISSUE. WHY NOT EXTEND TO THIS YEARS SAME VEHICLE MODEL. *TR”
Owner complaint to NHTSAFiled May 28, 2020Air bags, Seat beltsODI 11326395

Engine and engine cooling

7 reports1 crash
“S10 APPROPRIATE HANDLING- LETTER TO THE SECRETARY FROM CONSTITUENT RE COPY OF A LETTER ADDRESSED TO GENERAL MOTORS CHIEF EXECUTIVE OFFICER MARY BARRA REGARDING THE RECALL OF VEHICLES THAT CAN LEAK OIL AND CATCH FIRE. *SMD THE CONSUMER STATED THE TECHNICIAN SHOWED HIM WHERE BURNT OIL HAD LEAKED THROUGH ENGINE GASKETS BETWEEN THE CRANKCASE AND MANIFOLD. THE CONSUMER WAS QUOTED A PRICE OF $ 4,153.00 FOR THE REPLACEMENT OF THE GASKETS. THE PRICE WENT UP, AFTER THE REPAIRS WERE IN PROGRESS. THE CONSUMER WAS INFORMED ADDITIONAL GASKETS WERE NEEDED. *JB”
Owner complaint to NHTSAFiled Nov 10, 2015Engine and engine coolingODI 10806962

Seats

6 reports2 fires
“WHEN I MOVE THE DRIVER'S SEAT THE "AIRBAG" SYMBOL APPEARS ON THE DASHBOARD. IF I MOVE THE SEAT BACK AND FORTH , AFTER A FEW TRIES, THE "AIRBAG" SYMBOL DISAPPEARS. I WAS NOT ABLE TO LOOK UNDER THE SEAT, BUT I HAVE SEEN A VIDEO WHERE SOMEBODY HAD THE EXACT SAME PROBLEM BUT FOUND BURNT WIRES UNDER THE SEAT. I AM WONDERING IF THERE IS A FIRE HAZARD. THIS HAPPENED WHEN THE CAR IS STATIONARY.”
Owner complaint to NHTSAFiled Nov 1, 2018Air bags, SeatsODI 11144607
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 11, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.