NHTSA ID Number: 10210897
Manufacturer Communication Number: 21L02
Summary
Certain 2021 Model Year Mustang
Mach 1 Vehicles – Gas Guzzler Tax: In some of the affected vehicles, Ford
discovered that some customers were overcharged $1,000 for the Gas Guzzler Tax upon purchasing the vehicle. Customers that were overcharged will be refunded $1,000.
AFFECTED VEHICLES
| Vehicle | Model Year | Assembly Plant | Build Dates |
| Mustang | 2021 | Flat Rock Assembly Plant | January 4, 2021 through March 26, 2021 |
REASON FOR THIS ACTION
In some of the affected vehicles Ford
discovered that some customers were overcharged $1,000 for the Gas Guzzler Tax upon purchasing the vehicle. Customers that were overcharged will be refunded $1,000.
SERVICE ACTION
Ford
will refund $1,000 to the customer for the overcharge on the Gas Guzzler Tax. The refund will be provided to all affected customers. No service action is required by the dealership.
OWNER NOTIFICATION MAILING SCHEDULE
Ford
Motor Company will mail a $1,000 refund check, and an Owner Letter the week of April 18, 2022.
EXPIRATION DATE
This program will expire 6 months after customers receive their refund checks.
1 Affected Product
Vehicle
1 Associated Document
Manufacturer Communications
Special Field Action 21L02
April 4, 2022
- Proven to clean intake valves on GDI engines and turbo systems
- Easily installed through the air intake system
- Highest concentration PEA (Polyether Amine) detergency available
- Proven to remove up to 46% of GDI Intake Valve deposits in 1 hour
- 150X more concentrated than fuel additives
- Proven to clean intake valves on GDI engines and turbo systems with advanced Cozol technology
- Increases horsepower and improves air/fuel ratio and MPG by cleaning mass air flow sensors
- Easily installed CRC cleaner through the air intake system to remove deposits
- CRC GDI cleaner dissolves baked-on carbon deposits for smoother idle
- Mass air flow sensor cleaner dries in seconds and is plastic safe
- Gumout Professional Formula Mass Air Flow Sensor Cleaner Safely Cleans Gas and Diesel MAF Sensors Restoring Sensor Functionality and Engine Performance.
- Deep Cleans GDI (Gasoline Direct Injection) / PFI (Port Fuel Injection) Intake Valves, As Well As, The Throttle Body, Intake Ports, Fuel Injectors and Combustion Chambers
- BERRYMAN 2611 CLEANER – Receive one (1), 16 oz can of Berryman Intake Valve & Combustion Chamber Cleaner with Application Hose Kit (MPN 2611). Professional engine carbon cleaner spray formulated to remove carbon buildup from intake valves and combustion chambers in gasoline engines.
- DIRECT INDUCTION CLEANING TREATMENT – This intake valve cleaner spray is applied through the intake system while the engine is running, allowing the cleaner to reach intake valves and combustion chambers directly. Designed for use in fuel injected gasoline engines including PFI, TBI and modern GDI engines.
- POWERFUL PEA CARBON CLEANING – Contains polyetheramine (PEA), a professional engine cleaning agent used to break down stubborn carbon deposits. Helps remove buildup from intake valves, combustion chambers and internal engine components to restore airflow and combustion efficiency.
- RESTORE ENGINE PERFORMANCE & DRIVABILITY – Dissolves heavy carbon buildup that can reduce efficiency and cause rough idle, hesitation and reduced power. Helps restore original octane requirements and improve throttle response, acceleration and overall engine performance. Safe for catalytic converters and oxygen sensors.
- UNIVERSAL APPLICATION ACCESSORIES – Includes application hoses and adapters designed for induction cleaning treatments across a wide range of gasoline engines. Bundle also includes one (1), SMA ProQor reusable shop towel for wiping spills and keeping your workspace clean during engine maintenance.
- Removes Carbon Buildup Fast: Breaks down stubborn, baked‑on carbon deposits on intake valves and turbo components, restoring airflow and improving engine performance.
- Boosts Power & Efficiency: Regular use increases power and torque, improves MPG, and reduces rough idle, hesitation, and hard starts.
- Proven High‑Strength Formula: Delivers concentrated cleaning agents directly to intake valves—up to 150× stronger than premium fuel additives—and removes up to 46% of deposits within the first hour.
- No Engine Teardown Required: Safe for GDI and PFI engines; simply spray through the air intake system for professional‑grade cleaning without disassembly.
- Reduces Emissions & Improves Drivability: Helps restore proper combustion, reduce harmful emissions, and smooth out idle and acceleration for a cleaner‑running engine.
Last update on 2026-06-10 / Affiliate links / Images from Amazon Product Advertising API
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© Copyright 2022 Ford
Motor Company David J. Johnson Ford
Motor Company Director P. O. Box 1904 Service Engineering Operations Dearborn, Michigan 48121 Ford
Customer Service Division April 4, 2022 TO: All U.S. Ford
and Lincoln
Dealers SUBJECT: Special Field Action 21L02 Certain 2021 Model Year Mustang
Mach 1 Vehicles Gas Guzzler Tax AFFECTED VEHICLES Vehicle Model Year Assembly Plant Build Dates Mustang
Mach 1 2021 Flat Rock Assembly Plant January 4, 2021 through March 26, 2021 REASON FOR THIS ACTION In some of the affected vehicles Ford
discovered that some customers were overcharged $1,000 for the Gas Guzzler Tax upon purchasing the vehicle. Customers that were overcharged will be refunded $1,000. SERVICE ACTION Ford
will refund $1,000 to the customer for the overcharge on the Gas Guzzler Tax. The refund will be provided to all affected customers. No service action is required by the dealership. OWNER NOTIFICATION MAILING SCHEDULE Ford
Motor Company will mail a $1,000 refund check, and an Owner Letter the week of April 18, 2022. EXPIRATION DATE This program will expire 6 months after customers receive their refund checks. QUESTIONS & ASSISTANCE For questions and assistance, contact the Special Service Support Center (SSSC) via the SSSC Web Contact Site. The SSSC Web Contact Site can be accessed through the Professional Technician System (PTS) website using the SSSC link listed at the bottom of the OASIS VIN report screen or listed under the SSSC tab. Sincerely, David J. Johnson
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