Peterbilt 579 vs BMW X4
Both cars' complete complaint records, side by side.
Read the totals carefully. NHTSA publishes no sales figures, so the car that sold more collects more complaints regardless of quality. The rows worth weighing are the proportions — the share of complaints that involved harm, and which part dominates.
| Measure | Peterbilt 579 | BMW X4 |
|---|---|---|
| Complaints on file | 55 | 137 |
| Model years covered | 2013–2026 | 2015–2025 |
| Worst model year | — | 2015 |
| Best model year | — | 2016 |
| Crashes reported | 1 | 17 |
| Fires reported | 7 | 8 |
| Injuries reported | 1 | 4 |
| Deaths reported | 0 | 0 |
| Most complained-about part | Transmission & Drivetrain | Engine & Cooling |
| Share of complaints involving harm | 16.4% | 21.2% |
Peterbilt 579 by year
What breaks
Transmission & Drivetrain
11
20.0%
Electrical System
10
18.2%
Brakes
7
12.7%
Steering
5
9.1%
Tires
5
9.1%
Suspension
4
7.3%
Engine & Cooling
3
5.5%
Fuel & Propulsion
2
3.6%
BMW X4 by year
What breaks
Engine & Cooling
27
19.7%
Electrical System
26
19.0%
Brakes
14
10.2%
Other & Unspecified
14
10.2%
Transmission & Drivetrain
11
8.0%
Driver Assist & Collision Avoidance
8
5.8%
Airbags
7
5.1%
Suspension
6
4.4%