Frontline and Pierce service campaign 74B345
What it saysPierce has updated our inverter installation policy to require a sub-feed breaker box with inverters that can supply over 2400W (20A @ 120V) in an unprotected output. NHTSA’s full summary ↓
Frontline and Pierce filed this with NHTSA as a service campaign dated Sep 22, 2026, received Oct 8, 2026, about the electrical system. It names 109 model years across Frontline and Pierce (2016–2026). A service campaign is not a safety recall — there is no NHTSA campaign number and no federal requirement — but it is usually work the manufacturer pays for on the vehicles it names; the dealer checks the VIN against the manufacturer’s list.
One page for every brand it was filed under. Each brand’s bulletins: Frontline · Pierce.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationPierce has updated our inverter installation policy to require a sub-feed breaker box with inverters that can supply over 2400W (20A @ 120V) in an unprotected output. In alignment with the National Electric Code (NEC), this will ensure that any 15A or 20A inverter load will not exceed the current rating of the wire or device.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 74B345 | Service campaign | Sep 22, 2026 | 11038393 | PDF, 626 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themFrontline 2 model years
Also filed against: 2022 Frontline Impel; 2022 Frontline Velocity.
Pierce 107 model years
Also filed against: 2016 Pierce Arrow XT; 2017 Pierce Arrow XT; 2018 Pierce Arrow XT; 2019 Pierce Arrow XT; 2020 Pierce Arrow XT; 2021 Pierce Arrow XT; 2022 Pierce Arrow XT; 2023 Pierce Arrow XT; 2024 Pierce Arrow XT; 2025 Pierce Arrow XT; 2026 Pierce Arrow XT; 2016 Pierce Commercial; 2017 Pierce Commercial; 2018 Pierce Commercial; 2023 Pierce Commercial; 2024 Pierce Commercial; 2016 Pierce Dash; 2017 Pierce Dash; 2018 Pierce Dash; 2019 Pierce Dash; 2020 Pierce Dash; 2016 Pierce Dash CF; 2017 Pierce Dash CF; 2018 Pierce Dash CF; 2019 Pierce Dash CF; 2020 Pierce Dash CF; 2021 Pierce Dash CF; 2022 Pierce Dash CF; 2016 Pierce Enforcer; 2017 Pierce Enforcer; 2018 Pierce Enforcer; 2019 Pierce Enforcer; 2020 Pierce Enforcer; 2021 Pierce Enforcer; 2022 Pierce Enforcer; 2023 Pierce Enforcer; 2024 Pierce Enforcer; 2025 Pierce Enforcer; 2026 Pierce Enforcer; 2022 Pierce F550; 2016 Pierce Freightliner; 2017 Pierce Freightliner; 2018 Pierce Freightliner; 2020 Pierce Freightliner; 2021 Pierce Freightliner; 2022 Pierce Freightliner; 2023 Pierce Freightliner; 2024 Pierce Freightliner; 2016 Pierce Impel; 2017 Pierce Impel; 2018 Pierce Impel; 2019 Pierce Impel; 2020 Pierce Impel; 2021 Pierce Impel; 2022 Pierce Impel; 2023 Pierce Impel; 2024 Pierce Impel; 2025 Pierce Impel; 2026 Pierce Impel; 2020 Pierce International and 47 more.
None of these model years has a page on this site (it covers EPA-certified cars, trucks and SUVs from 2016), so the bulletin is listed here on its own.
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Frontline and Pierce, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is Frontline and Pierce 74B345 a recall?
No. A service campaign is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls.
Is the 74B345 repair free?
A service campaign is usually paid by the manufacturer on the vehicles it names, within the terms and time limit the document sets; the dealer checks the VIN against the manufacturer’s list.
Which vehicles does 74B345 cover?
The manufacturer filed it against 109 model years across 2 brands (Frontline and Pierce): 2022 Frontline Impel, 2022 Frontline Velocity, 2016 Pierce Arrow XT, 2017 Pierce Arrow XT, 2018 Pierce Arrow XT, 2019 Pierce Arrow XT and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.