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2026 Mack Pioneer PR (4)Problems, recalls & complaints

NHTSA has logged 0 owner complaints about the 2026 Mack Pioneer PR (4). It is covered by 9 safety recalls, and for recall 25V-622 the manufacturer reports only 95% of affected cars repaired.

–
CarFlaw IndexToo new to rateHigher is better (0–100)
Safety recalls9Lowest repair rate 95%Owner complaints00 with a crash, fire or injuryTop problem0—

Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through October 1, 2026. Updated daily.

Complaints by system

Where the 2026 Mack Pioneer PR (4) has problems

0 complaints grouped by the system owners reported.

Box size = number of complaints naming that system. Darker = larger share. One complaint can name more than one system.
Complaints by system
SystemComplaintsCrash, fire or injury

Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.

9 recalls

2026 Mack Pioneer PR (4) recalls and how many were fixed

Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.

–no report yet

Bumpers: active shutters/grill

New

Recall 26V-631 · Oct 1, 2026 · 3,096 vehicles

Risk. A detached bezel can become a road hazard for other vehicles, increasing the risk of a crash.

Problem, fix and repair progress →

–no report yet

Service brakes, electric: software/programming

New

Recall 26V-620 · Sep 28, 2026 · 850 vehicles

Risk. Reduced braking performance can require a greater distance to stop, increasing the risk of a crash.

Problem, fix and repair progress →

84%repaired · 2026 Q3

Wheels: lugs/nuts/bolts/studs

Do not driveNew

Recall 26V-351 · May 28, 2026 · 644 vehicles · 538 repaired

Risk. Wheel detachment can cause a loss of vehicle control or create a road hazard, increasing the risk of a crash or injury.

Problem, fix and repair progress →

60%repaired · 2026 Q3

Antilock: control unit/module

New

Recall 26V-261 · Apr 23, 2026 · 2,772 vehicles · 1,663 repaired

Risk. A loss of anti-lock brakes and electronic stability control increases the risk of a crash or injury.

Problem, fix and repair progress →

Show 5 more recalls
87%repaired · 2026 Q3

Exterior lighting: turn signal

New

Recall 26V-207 · Apr 1, 2026 · 86 vehicles · 75 repaired

Risk. Turn signals that do not function properly may fail to indicate the driver's intention to change vehicle direction, increasing the risk of a crash.

Problem, fix and repair progress →

80%repaired · 2026 Q3

Lighting control module: software

New

Recall 25V-803 · Nov 20, 2025 · 247 vehicles · 197 repaired

Risk. High beam headlights that do not switch to low beam as intended can reduce visibility for oncoming traffic, increasing the risk of a crash.

Problem, fix and repair progress →

87%repaired · 2026 Q3

Equipment: mechanical

New

Recall 25V-801 · Nov 20, 2025 · 46 vehicles · 40 repaired

Risk. A loose or unsecured load lock bar can result in a loss of cargo, creating a road hazard and increasing the risk of a crash.

Problem, fix and repair progress →

95%repaired · 2026 Q3

Exterior lighting: lighting control module

Recall 25V-622 · Sep 18, 2025 · 156 vehicles · 148 repaired

Risk. Trailer tail lights and turn signals that do not illuminate as intended can reduce visibility to other drivers, increasing the risk of a crash.

Problem, fix and repair progress →

Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Mack.

Best & worst years

2026 vs. every other Pioneer PR (4) year

Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the Pioneer PR (4) median. How we score

'25'26'27
  • Avoid
  • Caution
  • Solid
  • Best
  • Not rated

Own a 2026 Pioneer PR (4)?

Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.