2021 Ford Mustang Service and Repair Manual

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Factory-Grade Data

2021 Ford Mustang service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Built for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and use wiring diagrams and system sections to diagnose problems faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical coverage with wiring diagrams
  • Coverage across key systems: engine, transmission, brakes, steering, suspension, HVAC, and more

Trims covered

  • EcoBoost Premium Convertible 2-Door
  • GT Premium Convertible 2-Door
  • EcoBoost Coupe 2-Door
  • GT Premium Coupe 2-Door
  • GT Convertible 2-Door
  • Shelby GT500 Coupe 2-Door
  • EcoBoost Convertible 2-Door
  • GT Coupe 2-Door
  • GT V8 Coupe 2-Door
  • GT V8 Convertible 2-Door
  • EcoBoost Premium Coupe 2-Door
  • Mach 1 Coupe 2-Door

Engines covered

  • 2.3L 2300CC 140Cu. In. l4 GAS DOHC Turbocharged
  • 5.0L 5038CC 307Cu. In. V8 GAS DOHC Naturally Aspirated
  • 5.2L 5163CC 315Cu. In. V8 GAS DOHC Supercharged

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2021 Ford Mustang Recalls & Complaints

NHTSA #21V98000016/12/2021Component: AIR BAGS:SIDE/WINDOW:CURTAIN

Ford Motor Company (Ford) is recalling certain 2021 Mustang vehicles. The side curtain air bag inflators may have been manufactured with the incorrect amount of compressed gas, wh

Consequence

An air bag that does not inflate properly can increase the risk of injury in a crash.

Remedy

Dealers will replace the side curtain air bags, free of charge. An interim owner notifica

NHTSA #22V08300016/02/2022Component: AIR BAGS:KNEE BOLSTER

Ford Motor Company (Ford) is recalling certain 2021-2022 Mustang vehicles. An insufficient weld on the front passenger knee air bag may result in an improper air bag deployment.

Consequence

An improper air bag deployment can increase the risk of injury during a crash.

Remedy

Dealers will replace the front passenger knee air bag, free of charge. Owner notification

NHTSA #25V68900010/10/2025Component: ELECTRICAL SYSTEM:BODY CONTROL MODULE/BCM

Ford Motor Company (Ford) is recalling certain 2021-2023 Mustang vehicles repaired incorrectly under recall number 23V727. The brake fluid level sensor may not activate the visual

Consequence

Without a low brake fluid warning light, the vehicle may be driven with low brake fluid, r

Remedy

Dealers will update the body control module software, free of charge. Owner notification l

TSB #11032697

This bulletin supersedes 26-2046. Reason For Update: update the parts list to change the claim quantity of the C clutch friction plates (HL3Z-7B164-A), C clutch steel plates (HL3Z-7B442-F), D clutch steel plates (HL3Z-7B442-D), add the rear

TSB #11031263

Various 2020-2026 Ford and Lincoln vehicles equipped with blind spot information system (BLIS) may experience an inoperative blind spot monitoring with a "Blind Spot System Fault" message displayed in the instrument panel cluster (IPC). Thi

TSB #11031262

For 20212026 vehicles equipped with the 10R80 transmission, a new Transmission Clutch Circuit Leak Test has been introduced in the Ford Diagnosis and Repair System (FDRS). This test utilizes the pressure and vacuum transducer (PVT) when

TSB #11030791

For 2021-2026 vehicles equipped with the 10R80 transmission, a new Transmission Clutch Circuit Leak Test has been introduced in the Ford Diagnosis and Repair System (FDRS). This test utilizes the pressure and vacuum transducer (PVT) when

TSB #11030282

Advance Notice Customer Satisfaction Program 25N17 Certain 2015-2025 Model Year Multiple Vehicle Lines Rear View Camera Replacement If Required After Dealer Evaluation

TSB #11029595

Some 2019-2024 Ford and Lincoln vehicles equipped with SYNC3 may experience various connectivity concerns with The Ford App Lincoln App including but not limited to: missing activation prompt pop-upon the vehicle's center display screen whe

TSB #11029052

Ford and Lincoln vehicles equipped with wired keyless entry keypad systems and accessory wireless keyless entry keypad systems may or may not come with a wallet card containing the master code. Unlike the integrated wired keypad, the access

TSB #11028832

This bulletin supersedes TSB 25-2611. Reason For Update: Change the part number for the transmission fluid heat exchanger bolt (Expedition/Navigator) as well as change the claim/package quantities for HL3Z-7B442-F and HL3Z-7B164-C. Some of

Showing the 8 most recent of 147 technical service bulletins on file with NHTSA.

20240716Component: STEERINGCrash reported1 injured

The contact owned a 2021 Ford Mustang. The contact stated that while driving at highway speeds, the steering wheel independently veered in the right direction causing the contact t

20230518Component: ELECTRICAL SYSTEMCrash reported1 injured

The contact owns a 2021 Ford Mustang GT500. The contact stated that while driving at an undisclosed speed, the vehicle experienced a loss of power steering as the instrument cluste

20230518Component: POWER TRAINCrash reported1 injured

The contact owns a 2021 Ford Mustang GT500. The contact stated that while driving at an undisclosed speed, the vehicle experienced a loss of power steering as the instrument cluste

20230518Component: ENGINE AND ENGINE COOLINGCrash reported1 injured

The contact owns a 2021 Ford Mustang GT500. The contact stated that while driving at an undisclosed speed, the vehicle experienced a loss of power steering as the instrument cluste

Showing the 4 most serious of 66 complaints filed with NHTSA.

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