Is the 2021 Ford Mustang reliable?

Overall reliability is generally solid for a sports car, especially when maintained on schedule, but it’s not immune to issues like infotainment glitches and occasional transmission behavior complaints depending on drivetrain and use.

What are the most common 2021 Ford Mustang problems?

Commonly reported issues include rough or hesitant shifting (most often discussed on the 10-speed automatic), SYNC/infotainment bugs, EVAP-related check-engine lights, and faster tire/brake wear on performance packages.

How much does it cost to maintain a 2021 Mustang?

Routine costs are usually manageable (oil changes, filters, brake fluid), but expenses rise with performance tires, larger brakes, premium fuel requirements on many trims, and optional track-focused components.

What are the best years of the Mustang to buy?

Many shoppers like 2018–2023 sixth-gen models for updated tech and refined powertrains, while 2015–2017 can offer value; the “best” year depends on whether you prioritize the latest features, a specific engine, or budget.

What should I check before buying a used 2021 Ford Mustang?

Verify service records, scan for stored codes, test all infotainment functions, evaluate transmission shift quality on a thorough test drive, inspect tire/brake wear, and check for signs of hard use (burnouts, uneven tires, or overheating history). For a deeper dive, get a complete owner’s guide with full specs, trim breakdowns, and maintenance schedules to help you buy smarter and keep your 2021 Ford Mustang running strong.

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Reliability AnalysisBased on known issue patterns, repair cost data, and ownership trends · How we score

2021 Ford Mustang Reliability ReportCommon Problems, Repair Costs & Expert Verdict

78/ 100

MODERATE RISK

Grade: C+

A potent American icon that delivers excitement, but demands an informed buyer to navigate its specific mechanical and electrical sensitivities.

Full system breakdown + what I would do

Should You Buy the 2021 Ford Mustang?

The 2021 Ford Mustang offers thrilling performance and iconic styling, but buyers should proceed with caution due to several persistent electrical quirks and potential concerns with specific powertrain configurations. While fundamentally robust, proactive maintenance and a thorough pre-purchase inspection are critical to mitigate moderate risks and ensure long-term satisfaction.

Biggest Strengths

Strong V8 and EcoBoost powertrains (especially with 10R80 automatic)
Generally robust chassis and suspension
Excellent aftermarket support and parts availability

Top Risk Areas

The systems that break first on the 2021 Ford Mustang. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.

Electrical / Infotainmentmoderate

Active Exhaust System (Optional)moderate

Manual Transmission (MT82-D4)major

Typical mileage, cost ranges, and the exact what-to-check list are in the full report.

NHTSA Recalls

6 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.

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, which can result in improper air bag inflation. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard numbers 226, "Ejection Mitigation," and 214, "Side Impact Protection."

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.

What breaks on the 2021 Ford Mustang?

Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.

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Ford Mustang by Year

Compare reliability scores across nearby years of the Ford Mustang. Click any year for its full report.

All Ford Mustang years ranked →Ford Mustang years to avoid →Ford Mustang common problems →

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Frequently Asked Questions

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