AI-generated · grounded in NHTSA data
Reliability & 5-year cost of ownership — 2021 Cadillac Ct4
Overall rating NHTSA-grounded
Average
Estimated 5-year repair + maintenance cost: $4,200–$6,700
The 2021 Cadillac CT4 has an average reliability due to transmission recalls and relatively few complaints. However, potential airbag and lighting software issues are of concern.
Most-common failures
| Part | Typical mileage | Cost range | Frequency |
|---|---|---|---|
| transmission | 20,000–40,000 miles | $1,500–$3,500 | common |
| airbags | 10,000–25,000 miles | $300–$1,200 | occasional |
| lighting system | 15,000–30,000 miles | $200–$500 | occasional |
Scheduled maintenance to budget
Routine items every owner should plan for.
- oil and filter changes
- tire rotations
- brake inspections
- coolant flushes
- spark plug replacement
- belt inspections
Warning signs to watch for
Symptoms that signal a major upcoming repair.
- transmission slipping
- malfunctioning airbag light
- DRL remaining active
- engine stalling
- odd steering behavior
Generated by gpt-4o on 8/24/2026. Cost ranges are conservative estimates that account for typical regional variation.