NHTSA Service Bulletin 10208355: 2021 Ford Mustang Mach E
Official manufacturer communication context for 2021 Ford Mustang Mach E, with affected products, buyer checks and links into Carchieve recall, problem and VIN research.
Reviewed June 2026 from NHTSA manufacturer communication and service bulletin records. Carchieve is independent and not affiliated with any vehicle manufacturer or government agency.
Software Update 2 (SU2) Phase 1 & part of Phase 2 for 2021 Model Year Mustang Mach-E vehicles is now available. Involves: Prevents EV charge programing locations from disappearing in SYNC, updates the start/stop charge to the MA and SYNC screen, charger stop timer fix, enhanced brake pedal feel, enhanced ESC performance durring significant vehicle dynamics maneuvers, ensures auxiliary water pump is supported when the PTC heater is operational for cabin or battery heating while vehicle is on-plug, Reduced fan noise when level 2 charging, prevents loss of propulsion during extended downhill driving (21P22), improved vehicle charging, improved high voltage to low voltage conversion, prevents low speed loss of propulsion when exiting adaptive cruise control while simultaneously accelerating.
What this bulletin may mean before buying
Treat this as service research, not a verdict on one car. Before you buy, compare this communication with official recall campaigns, model-level owner complaint patterns, and the exact vehicle’s VIN-decoded specifications. A bulletin can help you ask a seller or dealer sharper questions about software updates, known repairs, warranty extensions and service history.
Affected products listed in this communication
Buyer checklist
- Run the 17-character VIN and confirm the year, make, model, engine and equipment match the listing.
- Check recall campaign pages for safety actions that may require dealer repair.
- Compare this bulletin with common problem pages for the same model and component area.
- Ask the seller or dealer whether the bulletin procedure, update or inspection has already been completed.
- Use the used-car buying checklist and get an independent inspection.
Frequently asked questions
What is NHTSA service bulletin 10208355?
Software Update 2 (SU2) Phase 1 & part of Phase 2 for 2021 Model Year Mustang Mach-E vehicles is now available. Involves: Prevents EV charge programing locations from disappearing in SYNC, updates the start/stop charge to the MA and SYNC screen, charger stop timer fix, enhanced brake pedal feel, enhanced ESC performance durring significant vehicle dynamics maneuvers, ensures auxiliary water pump is supported when.
Is a service bulletin the same as a recall?
No. A recall is a safety campaign with a required remedy for affected VINs. A service bulletin or manufacturer communication usually describes diagnostic, repair, software, warranty or service information.
How should a used-car buyer use this bulletin?
Use it as a research signal. Compare it with recalls, owner complaints, service records, a VIN report and an independent inspection before buying.
Check the exact VIN before you buy
Model-level pages show public safety patterns. A full VIN report helps confirm the exact vehicle, decoded specs, recall applicability and buyer checks.
Get Full Report