YearToAvoid

2008 Cadillac STS Reliability Data: Problems & Recalls

Caution The 2008 Cadillac STS has a Caution verdict, with 50 NHTSA complaints and a complaint index of 67, ranking 3rd worst of 7 model years. Engine problems lead at 32% of complaints, with a median failure mileage of 80,000 miles.

Based on NHTSA complaints per model-year, not a reliability rating. Methodology

YearToAvoid Scorecard

Complaint Index
67/100
#3 of 7 STS years
Verdict
Caution
vs. other years of this model
Complaints
50
unique NHTSA reports
Recalls
1
distinct NHTSA campaigns
Crashes
6
reported in complaints
Fires
2
Injuries
2
Top issue
Engine
Best nearby year
2011
rated Best
NHTSA overall rating
Not rated
EPA combined MPG
19
16 city / 25 hwy
Injuries / deaths
2 / 0

Top 2008 Cadillac STS problems

Share of this year’s NHTSA complaints by component group. Groups with 15+ complaints have their own page.

  1. Engine16 (32%)
  2. Airbags11 (22%)
  3. Electrical System9 (18%)
  4. Brakes6 (12%)
  5. Suspension, Wheels & Tires6 (12%)
  6. Transmission & Powertrain6 (12%)
  7. Other5 (10%)
  8. Steering5 (10%)
  9. Fuel System4 (8%)
  10. Structure & Body2 (4%)

A complaint can list more than one component, so shares add up to more than 100%. Shares are % of complaints.

What owners report

  • Some owners report the engine warning light illuminating during normal highway driving with dealers unable to duplicate the failure.
  • A sudden, unexpected acceleration from 50 mph to 90 mph was reported while passing, with the brake pedal sticking to the floor before the vehicle finally slowed.
  • Airbags reportedly failed to deploy in a head-on crash at 35 mph and in a separate frontal collision with severe front-end damage.
  • Owners describe brake failure on a downhill grade that caused loss of control, and worn brakes years later that let the car lunge forward into a stationary object.
  • One owner reported an electrical fire in the rear of the vehicle after being rear-ended, causing significant damage.
  • Wheel rims reportedly cracked repeatedly after hitting potholes or speed bumps, with six rims replaced on one vehicle.
2008 Cadillac STS complaints: complaints filed per month3Apr 2008Mar 2010Sep 2011Aug 2014Apr 2015Jan 2017Jan 2019Jun 2025
50 complaints filed with NHTSA from Apr 2008 to Jun 2025; peak Mar 2015 (3).

2008 Cadillac STS recalls

1 NHTSA recall campaign list this model year.

  1. NHTSA 08V108000Mar 11, 2008Electrical System4,586 vehicles

    Exterior lighting

    Gm is recalling 4,586 my 2008 cadillac sts and sts-v passenger vehicles for failing to conform to the requirements of federal motor vehicle safety standard no. 138, 'tire pressure monitoring systems' (tpms). The standard requires an indication to the driver for certain tpms malfunctions. When the system detects a malfunction, the low tire warning light should flash for about one minute and then stay on the remainder of the ignition cycle. A driver information center message will also be displayed on the instrument panel.

    Risk: These indications of a system malfunction do not work. Premature tire failure could result in a loss of control of the vehicle, increasing the risk of a crash.

    Remedy: Dealers will reprogram the remote control door lock receiver module free of charge. The recall began on march 18, 2008. Owners may contact cadillac at 1-800-982-2339 or through their website at <a href=http://www.gmownercenter.com>http://www.gmownercenter.com</a> .

2008 Cadillac STS fuel economy and fuel cost

City
16 MPG
Highway
25 MPG
Combined
19 MPG
Annual fuel cost (EPA)
$3,850
15,000 mi/yr
Fuel
Regular
Current regular gas
$4.32/gal
national avg.

EPA figures; median across configurations of this model year. Estimate your own cost with the fuel cost calculator.

2008 compared with other STS years

Complaint Index by model year (0 = fewest issues, 100 = most)02550751002005200620072008200920102011
Complaint Index: 0 = fewest issues, 100 = most, relative to other years of this model. Avoid Caution Good Best
YearVerdictIndexComplaintsRecallsMPG
2006Avoid100139418
2007Caution5052218
2008Caution6750119
2009Good3315019
2010No verdict04019.5

All Cadillac STS years: best and worst →

Frequently asked questions

Is the 2008 Cadillac STS reliable?
NHTSA data shows a Caution verdict for the 2008 STS, with 50 complaints and a complaint index of 67. It ranks 3rd worst among the 7 STS model years covered.
What are the most common problems with the 2008 Cadillac STS?
Engine issues account for 32% of complaints, followed by airbags at 22% and electrical system problems at 18%, according to NHTSA complaint data.
Does the 2008 Cadillac STS have any recalls?
NHTSA lists one recall for the 2008 STS, campaign 08V108000, covering a tire pressure monitoring system (TPMS) issue affecting 4,586 vehicles. It is not a do-not-drive recall.
How does the 2008 STS compare to other STS years?
The 2008 STS is worse than 2007, 2009, 2010, and 2011, which have lower complaint indexes and better verdicts including Good and Best. It is better than 2005 and 2006, both rated Avoid with higher complaint indexes of 83 and 100.
At what mileage do 2008 Cadillac STS engine problems typically appear?
NHTSA complaint data shows a median mileage of 80,000 miles for engine-related failures in the 2008 STS.

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.