Ford bulletin 21B09 S2
Ford filed this with NHTSA as a service bulletin dated Apr 12, 2023, received May 2, 2023, about the electrical system. It names 10 model years (2016–2020). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationCertain 2014-2020 Model Year Multiple Vehicle Lines 3G Telematics Control Unit to 4G Upgrade Kit REASON FOR THIS SUPPLEMENT Program Terms & Urgency / Expiration Date: Program extension until July 31, 2023. Service Action: o IDS level 128 or higher is now required to address various programming issues encountered. o C-MAX Energi vehicles are now serviceable with new software and hardware. Labor Allowances: C-MAX labor has been updated. Parts Requirements / Ordering Information: o The C-MAX 4G Upgrade Kit is now orderable at this time with a new part number. o MKX Rear seat backrest nut claim quantity updated. Technical Information updates: o Ensure IDS level 128 or higher is used. o Toggling Valet Mode is no longer required. o C-MAX Energi instructions are now available. Owner Notification: Non-repaired vehicle owners will be mailed the week of April 17, 2023. Pickup and Delivery: Added Customer Acknowledgement Form - Review form contents with customer prior to kit ordering and obtain customer signature prior to installation for Focus BEV, C-MAX, and Fusion Energi vehicles.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| 21B09 S2 | Service bulletin | Apr 12, 2023 | 10235323 | not yet checked |
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 themA vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
Common questions
Source: NHTSA, 49 CFR 579.5Is Ford 21B09 S2 a recall?
No. A service bulletin 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, or on its page here.
Is the 21B09 S2 repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way.
Which vehicles does 21B09 S2 cover?
The manufacturer filed it against 10 model years: 2017 Ford C-MAX, 2016 Ford C-MAX, 2018 Ford Focus, 2017 Ford Focus, 2016 Ford Focus, 2020 Ford Fusion and more. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.