AI Damage2018 Cadillac XT5: common problems
Owners of the 2018 Cadillac XT5 filed 66 complaints with NHTSA, most often about engine and electrical system. The maker issued 662 service bulletins for this year. We found 1 repair videos on YouTube. Details by component below, with sources.
Key figures
- Owner complaints
- 66
- involving a crash
- 2
- Technical service bulletins (TSB)
- 662
- YouTube repair videos
- 1
What fails most often
- 1 Engine 23% of all complaints
- 2 Electrical system 21% of all complaints
- 3 Steering 18% of all complaints
- 4 Powertrain 17% of all complaints
- 5 Service brakes 12% of all complaints
- 6 Visibility 6% of all complaints
- 7 Vehicle speed control 6% of all complaints
- 8 Structure 5% of all complaints
- Engine: 15 complaints (23% of all); manufacturer bulletins for this component: 66.
- Electrical system: 14 complaints (21% of all); manufacturer bulletins for this component: 133.
- Steering: 12 complaints (18% of all); manufacturer bulletins for this component: 19.
- Powertrain: 11 complaints (17% of all), 1 of them with a crash reported by the owner; manufacturer bulletins for this component: 58.
- Service brakes: 8 complaints (12% of all); manufacturer bulletins for this component: 26.
Engines and transmissions
US-market versions per EPA. On the right: how many NHTSA complaints name this engine or transmission type.
- 3.6 L · petrol · 6 cyl
- automatic, 8-speed
Drive: FWD, AWD
Symptoms owners describe
How many of the 66 NHTSA complaints mention each symptom (automatic count from complaint text; one complaint can mention several).
Components owners complain about
| Component | Owner complaints | involving a crash | Technical service bulletins (TSB) |
|---|---|---|---|
| Engine | 15 | 0 | 66 |
| Electrical system | 14 | 0 | 133 |
| Steering | 12 | 0 | 19 |
| Powertrain | 11 | 1 | 58 |
| Service brakes | 8 | 0 | 26 |
| Visibility | 4 | 0 | 20 |
| Vehicle speed control | 4 | 1 | 4 |
| Structure | 3 | 0 | 32 |
| Tires | 2 | 0 | 22 |
| Suspension | 2 | 0 | 14 |
| Exterior lighting | 2 | 0 | 9 |
| Seats | 2 | 0 | 9 |
| Wheels | 1 | 0 | 43 |
| Forward collision avoidance | 1 | 1 | 12 |
What owners report
Short excerpts of NHTSA complaints in the original wording. These are owner statements not verified by NHTSA; personal data removed.
The fire department and police officer arrived at the scene to make a report. My initial thought was that my sandal may have got trapped but after returning home and rethinking the entire incident may times I believe this was “UNINTENTIONAL ACCELERATION “ The driver side airbag and knee airbag were deployed.
I was listening to the radio when I had the weird sensation that I was going backwards instead of being stopped. I looked around, realized I was going backwards and went to hit the break but my car had already hit the car behind me.
Check engine light sensor came on in mid-May which is the result of a faulty thermostat, also triggering a "Steering Assist is Reduced" message on the dashboard which I consider to be a safety issue. This is a known and common problem for this make, year and model and the cost to fix the problem is very expensive.
Thermostat failure causes steering assist to be reduced. This leaves more difficult steering especially in an emergency situation, thus a safety concern. The vehicle displays a warning: "Steering Assist Is Reduced, Drive with care".
My windshield has a lot of spider and has never been hit with anything. They spread from the bottom up
In addition, the vehicle failed to accelerate above 5 MPH with several unknown warning lights illuminated. The dealer was notified and sent a mobile mechanic to the residence to diagnose the vehicle; however, no cause for the failure was found.
However, at no point did the vehicle illuminate a Check Engine Light, despite the presence of an emissions‑related fault code.I am concerned for several reasons:A critical engine fault (P0128) did not trigger a Check Engine Light, leaving me unaware of any underlying issue.
Brakes failure. Approaching a busy intersection and facing a red light, I slowed and prepared to stop the vehicle. Nothing happened with regard to braking; instead, the engine seemed to rev up as it continued through the red-lighted intersection with 2 lanes of busy cross traffic from both directions.
When owners complained
NHTSA complaints by filing year. The peak shows at what age the problems show up most.
Comparison
By complaint count this model year ranks 750 of 2,102 model years in the NHTSA data (top 36% most complained about).
On average one model year of the XT5 has 28 complaints (11 years in the data). This year has 66, above average.
What to check before buying
- Engine. Cold start, unusual noises, oil leaks and engine codes.
- Electrical system. Scan all modules, test the battery and alternator, inspect connectors near the impact zone.
- Steering. Steering play, power assist, rack and tie rods after a wheel impact.
- Powertrain. Shift quality under load, harsh shifts, transmission codes, CV joints.
Manufacturer service bulletins
Bulletin titles as filed with NHTSA.
- This PI provides Diagnostics tips on how the LIN bus works and how to diagnosis it
- This preliminary information advises a dealer on how to email GDS2 session logs into Technical Assistance
- PI to help diagnose A/C concern
- This preliminary information communicates information about how to determine if a wheel and tires size…
- This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a…
This Preliminary information communicates the steps on how to save a GDS2 Session Log and upload to a Technical Assistance Case in CX Connect.
- This service bulletin provides information on Tire Sidewall Irregularities
- This service bulletin provides information on replacing the intake manifold when the engine is replaced…
This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
- This Preliminary Information communication provides information to the technician about vehicles that have…
This Preliminary Information communication provides information to the technician about vehicles that have had multiple repair attempts that are being performed on customer’s vehicles that exhibit vibration conditions…
- The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle…
The service bulletin advises the tech of a normal transmission shift condition and the delay in throttle response when the throttle plate is opened rapidly and advises the customer that it is normal for the delay.
- This Preliminary information communicates a possible issue with an engine timing chain, gear or crankshaft key
- New Vehicle Monitoring Programs Section in IVH
- Provide info on that parts restriction ending for the rear diff clutch control 19435910
NHTSA lists 662 bulletins for this year; the 12 newest are shown here.
Repair videos
We do not copy videos: these are YouTube links credited to their authors. Amounts are as stated by the author and not verified by us.
Other years of this model
Questions and answers
What are the most common problems with the 2018 Cadillac XT5?
Owner complaints to NHTSA most often mention: engine, electrical system, steering. Total complaints: 66. The most frequent symptoms in complaint texts: warning lights, check engine (23%), A/C or heater (6%), rear-view camera (5%).
How many service bulletins (TSB) were issued for the 2018 Cadillac XT5?
NHTSA lists 662 manufacturer service bulletins for this year. A bulletin tells dealers how to diagnose or fix a known issue; it is not a recall.
Should I buy a 2018 Cadillac XT5 from a US auction?
Owner complaints describe defects, not crash damage. Before bidding, check the components listed above and review the lot photos: VinWind builds a report of visible and hidden damage by VIN.
Other 2018 models
Read also
Sources: public NHTSA data (USA): service bulletins and owner complaints; YouTube: links to videos credited to their authors. Complaints are owner statements not verified by NHTSA, and describe defects rather than crash damage. Data updated 2026-11-04.