Ford · Known Issues
2021 Ford Transit Problems: 18 Known Issues
2021 model year · 5,825+ owner reports · Updated September 2026
2021 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
2021 model year · 5,825+ owner reports · Updated September 2026
2021 · All trims · All engines
Choose the year and equipment for your written issues and visual request.
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According to Au7o's analysis of 5,825+ owner reports, the 2021 Ford Transit has 18 documented known issues, with 8 rated critical. The most serious are 3.5L EcoBoost Twin Turbocharger Failure ($1,200-$3,500 repair), Fuel Injector Failure and Rough Running (EcoBlue Diesel) ($300-$2,500 repair), Front Brake Caliper Sticking / Premature Pad and Rotor Wear ($150-$900 repair), 10R80 (10-speed) Harsh/Delayed Shifts and Shudder (Software/Valve Body Related) ($250-$3,200 repair), PCM/ECM Software Calibration Causing Stall or No-Start After Refueling, Rear Leaf Spring U-Bolt and Spring Pack Fatigue / Breakage ($350-$1,200 repair), NOx Sensor / SCR DEF System Faults Causing Reduced Power (2.0L EcoBlue Diesel) ($350-$1,800 repair) and Turbo Wastegate Actuator Sticking Causing Limp Mode ($200-$2,500 repair). The most commonly reported issue is Roof Water Leaks and Premature Rust - All Body Styles with 2,140 owner reports. Across all issues with published estimates, repair costs range from $50 to $3,500. DIY maintenance guides at au7o.io.
ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
Ford Motor Company (Ford) is recalling certain 2022-2023 Transit vehicles. The heating, ventilation, and air-conditioning (HVAC) system's controls, including those for defog and defrost, may become inoperative.
FUEL SYSTEM, GASOLINE:STORAGE:TANK ASSEMBLY
Ford Motor Company (Ford) is recalling certain 2023 Transit vehicles. The fuel tank grade vent valve may not be properly welded to the fuel tank shell, which can result in a fuel leak.
VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM
Ford Motor Company (Ford) is recalling certain 2023 Transit vehicles equipped with the Special Vehicle Operations Accessory Service Kit #1 or #2 with a High Specification Vehicle Interface Connector. When the accessory kit is installed, the auxiliary wire harness will disable the heating, air-conditioning, and ventilation (HVAC) including the defrost and defog systems. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 103, "Windshield Defrosting and Defogging Systems."
FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
Quality Vans (Quality Vans) is recalling certain 2020-2023 Ford Transit vans equipped with Onan QG 2800i EVAP generators, part number 2.8HGLAA-8303A. The fuel hose between the inline fuel filter and the Injection Pump Module (IPM) may not be properly secured, which can cause a gas leak.
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
Ford Motor Company (Ford) is recalling certain 2020-2023 Lincoln Aviator, 2018-2021 Lincoln Navigator, 2022-2023 Ford Transit, and 2021 Ford Bronco vehicles. The rearview camera, or 360-degree view camera if equipped, may not display a rearview image when the vehicle is placed in reverse.
+ 28 more recalls. Check all on NHTSA.gov
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According to Au7o's analysis of 5,825+ owner reports, the 2021 Ford Transit has 18 documented issues. The most frequently reported are: 3.5L EcoBoost Twin Turbocharger Failure, Fuel Injector Failure and Rough Running (EcoBlue Diesel), Front Brake Caliper Sticking / Premature Pad and Rotor Wear. Of these, 8 are rated critical and should be addressed promptly.
The 2021 Ford Transit has 18 known issues documented across 5,825+ owner reports. 8 issues are rated critical: 3.5L EcoBoost Twin Turbocharger Failure and Fuel Injector Failure and Rough Running (EcoBlue Diesel) and Front Brake Caliper Sticking / Premature Pad and Rotor Wear and 10R80 (10-speed) Harsh/Delayed Shifts and Shudder (Software/Valve Body Related) and PCM/ECM Software Calibration Causing Stall or No-Start After Refueling and Rear Leaf Spring U-Bolt and Spring Pack Fatigue / Breakage and NOx Sensor / SCR DEF System Faults Causing Reduced Power (2.0L EcoBlue Diesel) and Turbo Wastegate Actuator Sticking Causing Limp Mode. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Ford Transit issues range from $50 to $3,500, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 3.5L EcoBoost Twin Turbocharger Failure, typically costs $1,200-$3,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
The Ford Transit 350/350 HD with the 3.5L EcoBoost twin-turbocharged V6 experiences turbocharger failures from inadequate lubrication, carbon buildup in the turbo housings, wastegate actuator failure, and turbo bearing wear. OMS AutoParts and Autodoc document common Transit turbo… Repairs typically run $1,200-$3,500. Severity: high.
The 2017-2023 Ford Transit with the 2.0L EcoBlue diesel engine (available in some markets) and the 3.5L EcoBoost V6 experience fuel injector failures causing rough running, misfires, poor idle, reduced performance, and excessive smoke on cold start. Parkers UK documents an offici… Repairs typically run $300-$2,500. Severity: high.
Front brake calipers on the Ford Transit, especially the heavy-duty variants (350 and 350HD), are prone to sticking due to corrosion of the caliper slide pins and guide bolts. The high gross vehicle weight combined with stop-and-go commercial use accelerates heat buildup, which b… Repairs typically run $150-$900. Severity: high.
Later Transits equipped with the 10R80 10-speed automatic have documented owner complaints of harsh 1-2/2-3 shifts, delayed engagement, and occasional shudder. Ford has issued multiple service communications/TSBs across Ford platforms using the 10R80 addressing shift quality via… Repairs typically run $250-$3,200. Severity: high.
Ford Transit owners, particularly those with the 3.5L EcoBoost and 3.7L V6, have reported stalling or no-start conditions immediately after refueling due to fuel vapor purge system calibration issues within the PCM. The evaporative emission canister purge valve and PCM calibratio… Severity: high.
Ford Transit rear leaf springs and their associated U-bolts have been reported to crack, fatigue, or break outright on high-roof and extended-length variants that are operated at or near maximum payload, particularly in commercial fleet service. The high static load combined with… Repairs typically run $350-$1,200. Severity: high.
EcoBlue diesel Transits have documented owner reports of check engine lights and emissions system warnings related to SCR/DEF operation, commonly tied to NOx sensor faults or SCR efficiency monitoring. When the system detects persistent faults, it may trigger reduced power or cou… Repairs typically run $350-$1,800. Severity: high.
The 3.5L EcoBoost twin-turbo Transit models experience wastegate actuator sticking, particularly on the passenger-side turbo. Carbon buildup and heat cycling cause the wastegate pivot to seize, resulting in either overboosting (wastegate stuck closed) or underboosting (stuck open… Repairs typically run $200-$2,500. Severity: high.
Ford Transit vans are well-known for water infiltration through the roof, particularly in medium-roof and high-roof configurations. Water intrudes through multiple paths: (1) factory roof plug holes (the 2015 roof has 16 plugged holes for optional roof rack and ancillary hardware… Repairs typically run $50-$3,500. Severity: medium.
Multiple Ford Transit owners and fleet operators have reported the instrument cluster exhibiting erratic speedometer behavior, gauge dropouts, and spontaneous warning light illumination without stored fault codes corresponding to the indicated faults. The issue is linked to a fau… Severity: medium.
NHTSA complaints and fleet/owner reports commonly cite the Transit sliding door becoming difficult to open/close, popping, grinding, or failing to latch. Wear in the center roller/hinge and track hardware can cause misalignment, especially on high-use cargo vans. The problem ofte… Repairs typically run $200-$1,200. Severity: medium.
The Ford Transit uses a twin I-beam or independent front suspension with radius arm bushings that are known to wear or crack prematurely, especially in high-mileage commercial fleets or when the vehicle is operated at or near maximum payload regularly. Worn bushings cause the fro… Repairs typically run $200-$600. Severity: medium.
The 2.0L EcoBlue diesel Transit has a documented pattern of boost pressure sensor and manifold absolute pressure (MAP) sensor failures, causing incorrect boost readings fed to the ECM. When the sensor fails or reads out of range, the ECM defaults to a conservative fueling map, re… Repairs typically run $80-$350. Severity: medium.
Transits equipped with rear A/C (dual HVAC) have documented complaints of repeated refrigerant loss and poor cooling, often traced to leaks at rear A/C lines, fittings, or rear expansion valve connections. Corrosion, vibration, and seal degradation can lead to slow leaks that are… Repairs typically run $300-$1,800. Severity: medium.
Ford Transit vans experience premature alternator failure, often between 50,000-80,000 miles. The internal voltage regulator fails first, causing undercharging or overcharging conditions. Commercial Transit vans with aftermarket upfitter packages (extra lighting, inverters, refri… Repairs typically run $400-$1,000. Severity: medium.
The Ford Transit rear-wheel-drive models develop axle shaft oil seal leaks at the rear differential, allowing gear oil to weep past the axle seals onto the brake backing plates and brake shoes/pads. The leak is often slow enough to go unnoticed until a rear brake inspection revea… Repairs typically run $250-$700. Severity: medium.
The Ford Transit aluminum oil pan is prone to drain plug thread stripping, especially in vehicles serviced at quick-lube shops or with frequent oil changes. The aluminum pan threads are softer than the steel drain plug, and over-torquing or cross-threading during routine oil chan… Repairs typically run $50-$800. Severity: medium.
Long-wheelbase and extended-length Transit models (T-250, T-350, T-350 HD) with two-piece driveshafts develop carrier bearing (center support bearing) failure. The rubber isolator deteriorates and the bearing wears, causing vibrations at highway speeds (50-70 mph) and a prominent… Repairs typically run $300-$800. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.