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2021 Ford

Mustang

Man 6-spd, 4 cyl, 2.3 L, Turbo

Ford Mustang: best and worst years
2021 Ford Mustang

Photo may show a different model year; you're viewing the 2021.

PhotoHandelsgeselschaftCC BY-SA 4.0Wikimedia Commons

Overview

Body
Subcompact CarsEPA, from EPA, last updated 6/11/2026
Drivetrain
Rear-Wheel DriveEPA, from EPA, last updated 6/11/2026
Transmission
Manual 6-spdEPA, from EPA, last updated 6/11/2026
Powertrain
GasEPA, from EPA, last updated 6/11/2026
Fuel
RegularEPA, from EPA, last updated 6/11/2026

Engine & performance

HP
310
Power to weight
0.080 hp/lb
Axle ratio
3.55
Cyl
4EPA, from EPA, last updated 6/11/2026
Aspiration
TurbochargedEPA, from EPA, last updated 6/11/2026
Start-stop system
NoEPA, from EPA, last updated 6/11/2026

Efficiency

MPG Hwy
29 mpgEPA, from EPA, last updated 6/11/2026
MPG City
21 mpgEPA, from EPA, last updated 6/11/2026
MPG Comb
24 mpgEPA, from EPA, last updated 6/11/2026
Fuel $/yr
$2,600EPA, from EPA, last updated 6/11/2026
CO₂
373 g/miEPA, from EPA, last updated 6/11/2026
Eco Score
5/10EPA, from EPA, last updated 6/11/2026
Smog score
5/10
Elec. Range
0 miEPA, from EPA, last updated 6/11/2026
SmartWay certified
No

Dimensions & capacity

Length
188 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Width
76 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Height
55 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Wheelbase
107 inNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026
Curb Weight
3,891 lbNHTSA vPIC, from NHTSA vPIC, last updated 6/5/2026

Safety NHTSA, model year

Overall crash rating
★★★★★
Rollover rating
★★★★★
Stability control (ESC)
Standard
Forward-collision warning
Optional
Lane-departure warning
Standard
Recalls
6
Owner complaints
54
Reported injuries
2

Reported problems NHTSA owner complaints, model year

  • FUEL SYSTEM, GASOLINE15%
  • POWER TRAIN14%
  • ENGINE12%
  • ELECTRICAL SYSTEM9%
  • UNKNOWN OR OTHER8%
  • BACK OVER PREVENTION6%

Source: NHTSA owner complaints, 66 total.

Ford Mustang: best and worst years

Known issues manufacturer service bulletins, model year

145 service bulletins filed with NHTSA for this model year

  • May 8, 2026POWER TRAINTSB 26-2226

    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 driveshaft flange CV joint-to-pinion flange cup bolts and retaining straps (LK4Z-4B496-B) for Transit, and update the parts description for the transfer case fluids applicable for each vehicle line. Some of the vehicles listed in the Model statement above may

  • Apr 2, 2026LANE DEPARTURE: BLIND SPOT DETECTIONSSM 54720

    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). This may also be accompanied by diagnostic trouble codes (DTCs) B118C:11 and/or B118C:15 stored in the driver door module (DDM), and/or B118D:11 and/or B118D:15 stored in the passenger door module (PDM). This may be due to the wiring connector from the mirror to

  • Apr 2, 2026POWER TRAINSSM 54719

    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 available. When referred to a specific clutch (A-F) test by a pinpoint test in Workshop Manual (WSM), Section 307-01 > Diagnosis and Testing, the Clutch Assembly tests have been updated with a hyperlink to the new Transmission Line Pressure Test - Pressure Va

  • Mar 25, 2026BACK OVER PREVENTION: REARVIEW SYSTEM BRAKING25N17

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

  • Mar 19, 2026POWER TRAINSSM 54674

    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 available. The Workshop Manual (WSM) has been updated under Section 307-01 > Diagnosis and Testing to include this procedure. The new test improves the accuracy of detecting leaks within transmission fluid circuits and replaces the previous air check method.

  • Feb 24, 2026ELECTRICAL SYSTEMSSM 54601

    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 accessory wireless keypad master code cannot be retrieved from the vehicle using a diagnostic scan tool or from the label printed on the body control module (BCM). The Factory Keyless Entry Code application within the diagnostic scan tool will not provide an applica

  • Feb 17, 2026ELECTRICAL SYSTEMSSM 54589

    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 when attempting to activate vehicle through The Ford App Lincoln App, incorrect location global positioning system GPS reported through The Ford App Lincoln App, problems with remote commands being performed through The Ford App Lincoln App and or incorrect data

  • Feb 13, 2026POWER TRAINTSB 26-2046

    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 the vehicles listed in the Model statement above may exhibit at least one of the following conditions: * Harsh engagement * Delayed engagement * Harsh shift * Delayed shift * Illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTC) P075

  • and 137 more

Source: NHTSA manufacturer communications (technical service bulletins).

Warranty manufacturer terms, by make

Basic
3 yr / 36k mi
Powertrain
5 yr / 60k mi
Roadside assistance
5 yr / 60k mi
EV battery
8 yr / 100k mi

Information is gathered on a best-effort basis from public sources, may be incomplete or out of date, and is not purchasing or financial advice. Verify with the manufacturer or dealer before buying.