1999 Cadillac STS
Only 13 complaints on file — too few for a fair verdict.
This verdict reflects complaint volume compared to this model's typical year. Recalls and safety issues below apply regardless of the verdict — always check them.
Only 13 complaints on file — too few for a fair verdict. The data below is complete but unranked.
- Complaints
- 13
- Recalls
- 0
- Investigations
- 0
- Top problem
- —
Too few to rank
None on file
None on file
Not enough data
Complaints per year
1999: 13 complaints
View as data table
| Year | Complaints |
|---|---|
| 1998 | 3 |
| 1999 | 13 |
| 2000 | 12 |
| 2001 | 12 |
| 2002 | 7 |
| 2003 | 8 |
| 2004 | 7 |
| 2005 | 101 |
| 2006 | 139 |
| 2007 | 52 |
| 2008 | 50 |
| 2009 | 15 |
| 2010 | 4 |
| 2011 | 7 |
Known problem areas
Only 13 complaints on file for this model year — too few to rank by share. Raw counts only, below.
Electrical system
6 of 13 total reports mention: electrical system.
Show complaint excerpts
Having problems with car keep charge, something is pulling or draining the battery, battery been replaced 3 times and still the same problems sometimes you get in the car and it start other time it won't.
NHTSA ODI report, 2012-05-22
Vehicle shuts down at cruising speeds, low speeds, and idling. All systems shut down without warning. Vehicle may or may not start back up immediately. I have seen several other complaints on same issue both on NHTSA and other chat boards.
NHTSA ODI report, 2006-03-27
On 11/27/00 car leased from chevy dealer and onstar put on by Cadillac dealer. On 01/08/01 car dead in drive,Cadillac dealer installed new battery. On 10/01/01 car quit while driving, Cadillac dealer installed new generator.
NHTSA ODI report, 2005-10-11
Engine and engine cooling
6 of 13 total reports mention: engine and engine cooling, most commonly citing engine.
Show complaint excerpts
1999 Cadillac STS experiencing problems with water sounds behind the dashboard as well as the engine overheating.*mr the dealer replaced the water pump but that did not resolve the problem.
NHTSA ODI report, 2005-05-25
Engine
2 of 13 total reports mention: engine.
Show complaint excerpts
Tl* the contact owns a 1999 Cadillac STS. The contact stated that while driving an unknown speed, the engine rpms increased as smoke was released from under the hood. The vehicle was towed to the mechanic who performed a diagnostic.
NHTSA ODI report, 2012-10-23
Tl* the contact owns a 1999 Cadillac STS. The contact stated that the head bolts were not the correct size for the engine and as a result, they stripped, causing the engine head to detach from the vehicle.
NHTSA ODI report, 2012-08-13
Suspension
1 of 13 total reports mentions: suspension, most commonly citing front.
Steering
1 of 13 total reports mentions: steering.
Safety timeline
No recalls on file for this model year.
0 recalls · 0 investigations · oldest first
To check one car, enter its VIN on the NHTSA recall page. Check a VIN →
Buy-smart checklist
1999 Cadillac STS — pre-purchase inspection
Inspect
- Electrical system: 6 reports on file for this year.
- Engine and engine cooling: 6 reports on file for this year.
- Engine: 2 reports on file for this year.
FAQ
- Is the 1999 Cadillac STS reliable?
- There isn't enough NHTSA complaint data on file yet to give this model year a verdict.
- What are the most common problems with the 1999 Cadillac STS?
- The most-reported component is electrical system, accounting for 46% of complaints on file.
- How many recalls does the 1999 Cadillac STS have?
- No recalls are on file for this model year.
Data updated 2026-10-31 · Complaints are unverified owner reports filed with NHTSA, not independently verified defects. Methodology.