1999 Cadillac STS Engine Problems
- Complaints
- 2about this part
- Share
- 15%of 13 total for the year
- Median mileage
- 104,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 2 complaints about the engine of the 1999 Cadillac STS, 15% of the 13 complaints for this model year. Where a mileage was given, the median is 104,000 miles. 1 a fire, according to the filers.
Fewer than 15 complaints name this part, so treat the figures as a rough indication only.
Example complaints
Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.
“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. The vehicle was taken to the dealer who diagnosed that the engine needed to be remanufactured. The vehicle was repaired however, the failure recurred. The manufacturer was not made aware of the failure. The vehicle was not further repaired. The VIN was not available. The failure mileage was 128,000 and the current mileage was unknown.”
NHTSA complaint #10470401, filed 2012-08, 128,000 milesEngine: other model years
Other parts of the 1999 Cadillac STS
← All problems reported for the 1999 Cadillac STS
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.
To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology