The defect
PACCAR Incorporated (PACCAR) is recalling certain 2020-2021 Peterbilt 520 vehicles. The stability control brake relay may have the Spring Brake Modulating (SBM) Valve or the lift axle hose incorrectly connected.
The risk
A stability control event meant to only actuate the ABS controlled wheel ends could actuate lift axle brakes or modulate park brake chambers and could possibly de-stabilize the vehicle, increasing the risk of a crash.
The remedy
PACCAR will notify owners, and dealers will inspect the suspect chassis and correct the brake relay plumbing if needed, free of charge. PACCAR has issued owners an interim notification on January 4, 2020. Owner notification letters were mailed on January 25, 2021. Owners may contact Peterbilt customer service at 1-940-591-4220. PACCAR's number for this recall is 20PBF.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Peterbilt 520 | 2020, 2021 |
Components: ELECTRONIC STABILITY CONTROL (ESC)
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Peterbilt 520 | 2020 | 3 | 12 |
| Peterbilt 520 | 2021 | 0 | 6 |
Other electronic stability control (esc) recalls in 2020
10 of the 782 recall campaigns reported to NHTSA in 2020 concerned the electronic stability control (esc); PACCAR Incorporated filed 154 campaigns in all.
| 20V732000 24 Nov 2020 | Bugatti |
| 20V406000 14 Jul 2020 | Daimler Coaches North America |
| 20V395000 6 Jul 2020 | Mercedes-Benz USA, LLC. |
| 20V303000 27 May 2020 | Thor Motor Coach |
| 20V209000 9 Apr 2020 | Forest River, Inc. |
| 20V210000 9 Apr 2020 | Forest River, Inc. |
| 20V199000 6 Apr 2020 | PACCAR Incorporated |
| 20V175000 23 Mar 2020 | Ford Motor Company |
NHTSA recalls (public domain) · all recalls of 2020