By model year
Mack Pioneer PR (4) complaints by model year
Owner complaints filed with NHTSA, all years filed, by model year.
Source: NHTSA ODI. Complaints are not verified by NHTSA, and NHTSA publishes no sales volumes, so counts are not rates.
Model line
Mack Pioneer PR (4)
Every Mack Pioneer PR (4) model year on file, 2025 to 2027. Pick a year for its recalls, investigations, service bulletins and the full text of owner complaints.
Owner complaints, all model years00 involved a crash, fire, injury or death
Model years32025 to 2027
Recall campaigns15Distinct campaigns listing it
Service bulletins297Summed across model years
Components
Complaints by component
Owner complaints across all model years, by component.
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Source: NHTSA ODI complaints file.
Model years
The record for each Mack Pioneer PR (4) model year
Peer index compares complaints with the median vehicle of the same model year and body class (100 is the median). It corrects for age, not for how many were sold.
| Year | Body | Complaints | Severity index | Peer index | Recalls | Investigations | Bulletins |
|---|---|---|---|---|---|---|---|
| 2027 | Not decoded | 0 | None | None | 6 | 0 | 42 |
| 2026 | Not decoded | 0 | None | None | 9 | 0 | 100 |
| 2025 | Not decoded | 0 | None | None | 12 | 0 | 155 |
Source: NHTSA ODI. Body class from NHTSA's VIN decoder where decoded.
Latest recalls
Recent campaigns covering the Mack Pioneer PR (4)
- 26V-631 Oct 1, 2026
Intake and grille bezels may detach from the vehicle
Structure · 3,096 vehicles - 26V-620 Sep 28, 2026
Inaccurate axle load calculations may cause reduced braking performance while transporting smoothbore tanker trailers
Brakes · 850 vehicles - 26V-515 Aug 6, 2026
Center roof marker lights may fail to illuminate
Lighting · 513 vehicles - 26V-351 May 28, 2026
Wheel lug nuts may loosen and allow the wheel to detach
Wheels · 644 vehicles - 26V-261 Apr 23, 2026
Rear brake modulators may have unprotected electrical connectors that can short circuit and lead to a loss of the anti-lock brake system (ABS) and…
Brakes · 2,772 vehicles - 26V-207 Apr 1, 2026
Trailer turn signals may not function properly
Lighting · 86 vehicles - 25V-803 Nov 20, 2025
Automatic high beams (AHB) may not switch to low beam headlights as intended
Lighting · 247 vehicles - 25V-801 Nov 20, 2025
Load lock clamps, located on the back of the cab, may loosen and cause the load lock bars to become unsecured
Equipment · 46 vehicles - 25V-622 Sep 18, 2025
When towing a trailer, the trailer lights may fail to illuminate due to an improperly manufactured body control module
Lighting · 156 vehicles - 25V-521 Aug 11, 2025
Dynamic steering and oversteer guidance feature may malfunction and cause a loss of steering control
Steering · 32 vehicles
Source: NHTSA ODI recalls file.