The worst 2021 Peterbilt 320 problems
Ranked by number of owner complaints. Mileage and cost come from what owners wrote.
Problems by type
Tap a problem to see which part fails, at what mileage and in which other years.
Recalls 2
Suspension: multiple axle
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2015-2023 Peterbilt 320 and 520 refuse trucks equipped with Haulmaax/EX suspensions. The suspension tracking rod brackets may fail and detach from the forward drive axle, causing the axle to become unstable.
- Risk
- An unstable axle can decrease vehicle stability and control, increasing the risk of a crash.
- Remedy
- Dealers will inspect the welds and add an additional bracket between the tracking rod bracket and axle housing, as necessary, free of charge. Owner notification letters are expected to be mailed February 14, 2023. Owners may contact Peterbilt's customer service at 1‑940‑591‑4220. PACCAR's number for this recall is 22PBL.
Recall number 22V939000 · Recall details
Steering: column
- What is wrong
- PACCAR Incorporated (PACCAR) is recalling certain 2015-2021 Peterbilt 320 and 520 vehicles. The steering column support structure may crack or break in certain right-hand, stand-up drive models.
- Risk
- If the steering column loosens from the mounting structure, steering control can become affected, increasing the risk of a crash.
- Remedy
- PACCAR will notify owners, and dealers will inspect the 520 models right hand stand-pp steering column structure and replace it if cracks are present, as well as add additional support brackets to the new (if replaced) or existing structure, free of charge. Additionally, for the 520 models, dealers will install a large gusset with triangulating support for the column bracket, free of charge. Owner notification letters were mailed July 30, 2021. Owners may contact Peterbilt customer service at 1‑940‑591‑4220. PACCAR's number for this recall is 21PBA.
Recall number 21V004000 · Recall details
Technical service bulletins for the 2021 Peterbilt 320 15
Bulletins tell dealers how to fix known problems. A warranty extension means the manufacturer pays for that repair for longer.
- 7/700 Service Agreement
- "Kenworth: Dealers should check the chassis list and SIR weekly for VIN changes
- Info Only Unnecessary starter replacements can result from customer complaints regarding engine starting...
- Info Only
- The service information for Bendix Air Dryer maintenance is being updated to include new procedures.
- This bulletin provides information on the EPA21 MX fuel injector cleaning procedure and includes suggested...
- Information Only – New Level 1 required tools are available to support MY21B MX engines.
- Due to major data carriers phasing out 3G networks, chassis currently utilizing first generation Peoplenet...
- Information Only: Due to differences between the PACCAR MX-11 or MX-13 2021A and 2021B engines,...
- Fix-As-Fail – Due to undersupply issues, only a limited supply of Diesel Exhaust Fluid (DEF) sensors are...
Compare the 2021 Peterbilt 320
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Questions about the 2021 Peterbilt 320
Is the 2021 Peterbilt 320 reliable?
Owners have filed 0 complaints about the 2021 Peterbilt 320.
What is the most common problem with the 2021 Peterbilt 320?
There are not enough complaints to tell.
How many recalls does the 2021 Peterbilt 320 have?
2 recalls, covering suspension and steering.
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