2009 Cadillac STS problems
Light NHTSA footprint — 15 owner complaints. Either a clean record or thin data; we'll show what's there.
The 2009 Cadillac STS has 15 NHTSA owner complaints on file (U.S. federal records, as of July 2026). The most-reported system is airbags at 4 complaints, typically surfacing around 78,625 miles (~$1,100 to repair). Source: NHTSA Office of Defects Investigation.
| Model year | Owner complaints | Recalls |
|---|---|---|
| 2006 STS | 141 | 1 |
| 2007 STS | 53 | 0 |
| 2008 STS | 50 | 1 |
| 2009 STS (this page) | 15 | 0 |
| 2010 STS | 4 | 0 |
| 2011 STS | 7 | 0 |
Above-average reliability for the segment. Few systemic issues on file.
Buyable on the data — keep up the usual maintenance and inspect normally.
- No systemic severe-failure pattern in the complaint record
- Reliability score 8.6/10 — above the segment average
Our read of the federal NHTSA complaint and recall record for this exact year and model — not a substitute for a pre-purchase inspection. How we score.
Buying a used 2009 Cadillac STS? Check these first
Here's what this model is known to do — so you can inspect for it, price it in, or make the seller fix it before you sign.
What to inspect on this specific car
- airbags — 4 owner reports · tends to show around 78,625 mi · ~$1,100 to fix
- steering — 3 owner reports · tends to show around 57,667 mi · ~$700 to fix
⚠ The one to take seriously: airbags is flagged severe on this model , showing up around 78,625 mi. Inspect it closely on a test drive.
Recalls to confirm are done
Run the VIN from the listing — no active recalls on this model right now, but confirm none were opened after this car was built.
Verdict for buyers: 8.6/10 model. The priciest documented failure is airbags (~$1,100) — get the seller's service records for it or inspect closely. Otherwise an average-risk used buy at a fair price.
We tell you what this model is known for and what to inspect — a vehicle-history report tells you what this exact car has been through. Smart buyers get both.
See the full pre-purchase inspection checklist →Ask anything about your 2009 Cadillac STS
A noise, a warning light, a repair quote, "should I buy this?" — get an answer grounded in this vehicle's actual NHTSA record, not generic advice.
Answers use this vehicle's NHTSA complaint & recall record — owner-reported and unverified, not a diagnosis. Verify anything safety-critical with a mechanic.
Top trouble spots 2 categories with 3+ complaints
What owners are saying recent NHTSA-filed complaints · verbatim
When driving in rain the smallest amount of water will cause the reduced engine power to engage and it does not go off until the vehicle has sat for a long amount of time. Extremely dangerous. First the ABS light comes on and then you lose power. 3rd row LED taillight out...…
My airbags did not deploy and my traction control failed. The airbag light remains on and there is a faulty code. The vehicle lost ability to control it to turn. I went straight into the fence. The airbags were not addressed by the body shop or repair shop.
Takata recall. Passenger seat, passenger detect sensor (pps) stopped working. No physical damage. Passenger present light says, passenger air bag off. Air bag dash light always on. I checked wiring under the seat and can not visually see any damage to the wiring going to the…
The car traction control failed and the vehicle had the service stability system come on. The ABS light was lit and the vehicle would not accelerate or turn easily. The vehicle went into the ditch. This vehicle had headlights prior to the incident with bulbs popping out inside…
Estimate your repair exposure
Drag to your current mileage. Numbers are derived from this vehicle's complaint history.
Common questions
Is the 2009 Cadillac STS reliable?
Mostly yes. With a reliability score of 8.6 out of 10 based on 15 owner complaints filed with NHTSA, the 2009 Cadillac STS is generally a sound vehicle. The areas to watch are listed in the top problem section above — most are budget items, not deal-breakers.
Should you avoid the 2009 Cadillac STS?
On the NHTSA data, the 2009 Cadillac STS does not need avoiding. Buyable on the data — keep up the usual maintenance and inspect normally. The record behind that call: No systemic severe-failure pattern in the complaint record; Reliability score 8.6/10 — above the segment average. This is our read of the federal complaint and recall data — not a substitute for a pre-purchase inspection.
What should I check before buying a used 2009 Cadillac STS?
Inspect the airbags first — it's the most-reported issue on this model, with 4 owner complaints filed. Typical failure occurs around 78,625 miles. Average repair cost runs about $1,100 at an independent shop. Also confirm any open recalls have been completed by running the VIN, and ask for service records covering the problem areas listed above.
Is the 2009 Cadillac STS a good used car to buy?
It scores 8.6 out of 10 on our NHTSA-based read of 15 owner complaints. The main thing to watch is airbags. Typical failure occurs around 78,625 miles. Priced fairly and clean on inspection, it's a reasonable used buy. Our data covers what this model is known for — pair it with a vehicle-history report on the VIN to see what that specific car has been through.
What's the most common problem on the 2009 Cadillac STS?
Based on NHTSA records, the most-reported issue is airbags, with 4 complaints filed. Typical failure occurs around 78,625 miles. Average repair cost runs about $1,100 at an independent shop.
What's the most expensive thing that goes wrong?
The airbags is one of the costlier repair items. Average repair cost runs about $1,100 at an independent shop. Typical failure occurs around 78,625 miles. Catching early warning signs can sometimes extend life by 20–30,000 miles.
How do I check if my Cadillac STS has open recalls?
Paste your VIN into the decoder at the top of this page. We pull live from NHTSA, so you'll see exactly which campaigns apply to your vehicle and whether the dealer has logged the fix. Recall repairs are always free regardless of mileage or warranty status.
Is an extended warranty worth it on a 2009 Cadillac STS?
Math is straightforward: a quality service contract runs $1,800–3,500 over 3 years. With 15 complaints on file and the costliest repair averaging $1,100, one major failure more than pays for it. The catch is reading the contract — many providers exclude wear items and require pre-authorization, so cheaper plans are not always better value.