YearToAvoid

2005 Cadillac STS Engine Problems

NHTSA has 24 owner complaints about engine problems in the 2005 Cadillac STS, 24% of all 101 complaints for this model year. That is #2 highest engine complaint count among 7 STS model years. These complaints report 5 crashes and 1 injury. Median mileage at failure: 67,000 miles.

Engine complaints
24
24% of 101 complaints
All complaints this year
101
Crashes reported
5
Fires reported
0
Injuries reported
1
Median mileage
67,000 mi
Related recalls
0

When 2005 Cadillac STS engine complaints were filed

First complaint Aug 12, 2005, latest Sep 16, 2019.

2005 Cadillac STS engine complaints: complaints filed per month3Aug 2005Apr 2007Jun 2010Sep 2013Sep 2014Nov 2015Sep 2019
24 complaints filed with NHTSA from Aug 2005 to Sep 2019; peak Nov 2014 (3).

Engine recalls for the 2005 Cadillac STS

No safety recalls on record for this model year.

Engine complaints by STS model year

Raw complaint counts per model year; newer years have had less time to accumulate complaints.

  1. 200524 (24%)
  2. 200633 (24%)
  3. 20077 (13%)
  4. 200816 (32%)
  5. 20093 (20%)
  6. 20101 (25%)
  7. 20111 (14%)

Frequently asked questions

Does the 2005 Cadillac STS have engine problems?
NHTSA has 24 owner complaints about the engine in the 2005 Cadillac STS, 24% of all complaints for this model year, including 5 that report a crash. Median mileage at failure is 67,000 miles.
Which Cadillac STS year has the most engine complaints?
The 2006 Cadillac STS has the most engine complaints (33), compared with 24 for the 2005.
Is there a engine recall for the 2005 Cadillac STS?
No NHTSA recall campaign for the 2005 Cadillac STS is classified under engine. Complaints alone do not trigger a recall; check the full recall list and your VIN.

Sources: NHTSA Office of Defects Investigation complaint and recall databases; U.S. EPA fuel economy data; NHTSA 5-Star Safety Ratings. Complaints are unverified owner reports.

Data updated Sep 24, 2026. Read the methodology and data sources. The Complaint Index is based on NHTSA owner complaints and recalls; it is not a reliability rating.