Ford · Known Issues
1966-2025 Ford Bronco Problems: 32 Known Issues
1966-2025 model years · 3,537+ owner reports · Updated September 2026
All years · All trims · All engines
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1966-2025 model years · 3,537+ owner reports · Updated September 2026
All years · All trims · All engines
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According to Au7o's analysis of 3,537+ owner reports, the 1966-2025 Ford Bronco has 32 documented known issues, with 17 rated critical. The most serious are 2.7L EcoBoost Intake Valve Failure ($0-$0 repair), 2.3L EcoBoost Oil Galley Plug Defect ($0-$0 repair), Front Seat Belt Pretensioner Non-Deployment Recall Issue ($0-$1,200 repair), 2025 Bronco EGR Valve Failure Can Cause Loss of Drive Power (Recall 26S10), TFI Ignition Module Heat-Soak Stalling / No-Start ($40-$350 repair), Frame Rot & Cracks at the Rear Shock Mounts and Spring Hangers ($800-$6,000 repair), Front-End 'Death Wobble' (Twin-Traction Beam / Dana 44 Wear) ($300-$900 repair), Inadequate Front Drum Brakes (Pre-1976) ($600-$2,500 repair), 2.3L EcoBoost Coolant Intrusion and Misfire from Cracked Cylinder Head/Head Gasket Area ($1,800-$8,000 repair), Body Rust: Floors, Rockers & Door Posts Rot From the Drip Rails Down ($1,500-$12,000 repair), Rear Differential Locking/Grinding and Complete Differential Failure ($1,500-$4,500 repair), Rear Shock Absorber Corrosion Leading to Detachment ($900-$2,200 repair), Sasquatch/HOSS Front CV Axle Clicking, Vibration, and Boot Failure ($600-$1,800 repair), Speed Control Deactivation Switch Fire (NHTSA Recall 05V388) ($0-$200 repair), Cam Phaser Rattle and Timing Chain Noise on 2.7L/3.0L EcoBoost ($1,800-$4,500 repair), Electric Power Steering Assist Loss and Steering Rack Failure ($1,800-$3,500 repair) and E4OD Automatic Transmission Failure (Heat and Brake-Circuit Related) ($2,200-$4,000 repair). The most commonly reported issue is MIC Hardtop Crazing and Delamination with 678 owner reports. Across all issues with published estimates, repair costs range from $40 to $12,000. DIY maintenance guides at au7o.io.
SUSPENSION:FRONT:CONTROL ARM:UPPER BALL JOINT
Ford Motor Company (Ford) is recalling certain 2024 Ranger, and 2024-2025 Bronco vehicles. The front upper control arm ball joint nut may not have been installed or tightened properly, allowing the front upper control arm to detach from the knuckle assembly.
POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:VALVES/VALVE BODY
Ford Motor Company (Ford) is recalling certain 2024-2025 F-150, Bronco, 2024 Ranger, 2025 Mustang, Explorer, and Aviator vehicles. The transmission valve body may have been machined incorrectly, which can cause reverse gear failure, or unexpected forward movement in reverse or neutral gear.
SUSPENSION:FRONT:CONTROL ARM:UPPER BALL JOINT
Ford Motor Company (Ford) is recalling certain 2025 Bronco vehicles. The front upper control arm ball joint nut may be missing or tightened improperly, allowing the front upper control arm to detach from the knuckle assembly.
SUSPENSION:FRONT:CONTROL ARM:LOWER ARM
Ford Motor Company (Ford) is recalling certain 2024-2025 Bronco vehicles. The front lower control arm fasteners may not have been tightened properly, allowing the control arm to detach from the frame.
SEATS:CRITICAL FASTENERS
Ford Motor Company (Ford) is recalling certain 2025 Ranger and Bronco vehicles. The bolts that secure the driver's seat frame to the body may be loose or missing. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 207, "Seating Systems."
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According to Au7o's analysis of 3,537+ owner reports, the 1966-2025 Ford Bronco has 32 documented issues. The most frequently reported are: 2.7L EcoBoost Intake Valve Failure, 2.3L EcoBoost Oil Galley Plug Defect, Front Seat Belt Pretensioner Non-Deployment Recall Issue. Of these, 17 are rated critical and should be addressed promptly.
The 1966-2025 Ford Bronco has 32 known issues documented across 3,537+ owner reports. 17 issues are rated critical: 2.7L EcoBoost Intake Valve Failure and 2.3L EcoBoost Oil Galley Plug Defect and Front Seat Belt Pretensioner Non-Deployment Recall Issue and 2025 Bronco EGR Valve Failure Can Cause Loss of Drive Power (Recall 26S10) and TFI Ignition Module Heat-Soak Stalling / No-Start and Frame Rot & Cracks at the Rear Shock Mounts and Spring Hangers and Front-End 'Death Wobble' (Twin-Traction Beam / Dana 44 Wear) and Inadequate Front Drum Brakes (Pre-1976) and 2.3L EcoBoost Coolant Intrusion and Misfire from Cracked Cylinder Head/Head Gasket Area and Body Rust: Floors, Rockers & Door Posts Rot From the Drip Rails Down and Rear Differential Locking/Grinding and Complete Differential Failure and Rear Shock Absorber Corrosion Leading to Detachment and Sasquatch/HOSS Front CV Axle Clicking, Vibration, and Boot Failure and Speed Control Deactivation Switch Fire (NHTSA Recall 05V388) and Cam Phaser Rattle and Timing Chain Noise on 2.7L/3.0L EcoBoost and Electric Power Steering Assist Loss and Steering Rack Failure and E4OD Automatic Transmission Failure (Heat and Brake-Circuit Related). 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 Bronco issues range from $0 to $12,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, 2.7L EcoBoost Intake Valve Failure, typically costs $0-$0 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
Reliability varies across model years of the Ford Bronco. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 1966-2025 Ford Bronco with 32 documented issues documented across 3,537+ owner reports.
The 2.7L EcoBoost V6 engine may experience catastrophic intake valve failure at low mileage. The valve head separates from the stem and drops into the cylinder, causing immediate loss of compression and potential catastrophic engine damage. Root cause identified as defective inta… Repairs typically run $0-$0. Severity: high.
Certain 2023 Broncos with the 2.3L EcoBoost engine have an improperly sealed main oil galley plug due to a machining tool error during manufacturing. This defect can cause oil leaks leading to oil starvation, engine failure, and potential fire risk. Repairs typically run $0-$0. Severity: high.
A documented Bronco safety issue involved front seat belt pretensioners that may not deploy properly in a crash. This defect increases injury risk because the restraint system may not tighten the belt as intended during impact. The issue is recall-documented and has been discusse… Repairs typically run $0-$1,200. Severity: high.
Ford's 26S10 safety recall includes certain 2025 Broncos. The problem is the exhaust gas recirculation (EGR) valve, which may fail and cause the Bronco to lose drive power unexpectedly. NHTSA's stated consequence is an increased risk of a crash — worth taking seriously given wher… Severity: high.
The distributor-mounted Thick Film Ignition (TFI) module is a chronic weak point on these Broncos. Because the module is bolted to the distributor and baked by engine heat, its internal electronics break down over time, causing the engine to miss, stumble, and stall once fully wa… Repairs typically run $40-$350. Severity: high.
Below the body, the chassis itself is a known failure point. The boxed frame rails trap moisture internally and rot from the inside out, and the worst spot is the area underneath/around the rear shock mounts and rear leaf-spring shackle hangers, where mud, road salt and off-road… Repairs typically run $800-$6,000. Severity: high.
The full-size Bronco uses Ford's Twin-Traction Beam (TTB) independent front suspension with a Dana 44 front axle, radius arms, and a track bar. As the pivot bushings, track-bar bushing, radius-arm bushings, tie-rod ends, and ball joints wear, a bump at highway speed can trigger a… Repairs typically run $300-$900. Severity: high.
Every Early Bronco through 1975 left the factory with front drum brakes (Ford only switched to factory front discs for 1976-77). On the road today the drums are simply not enough: reduced stopping power, heavy brake fade on repeated or downhill stops, and a big drop-off in the we… Repairs typically run $600-$2,500. Severity: high.
A subset of 2.3L Bronco owners report unexplained coolant loss, startup misfires, white exhaust smoke, and rough running traced to coolant entering one or more cylinders. Similar to other Ford 2.3L applications, the root cause is often linked to cylinder head casting issues or se… Repairs typically run $1,800-$8,000. Severity: high.
The number-one weak point on any Early Bronco and the single biggest cost driver in a restoration. The rot isn't a metallurgy problem, it's a design/drainage problem: the factory seam sealer in the roof drip rails dries out and cracks, so water runs inside the roof, down the A- a… Repairs typically run $1,500-$12,000. Severity: high.
Some Bronco owners have documented rear differential failures marked by whining, grinding, binding in turns, or sudden loss of propulsion. Reports include failures of the locking differential assembly and internal gear damage, sometimes at relatively low mileage and occasionally… Repairs typically run $1,500-$4,500. Severity: high.
Ford recalled certain Broncos because corrosion between the external reservoir and rear shock absorber could cause the reservoir to detach. Owners reported clunking noises, visible shock damage, and degraded rear suspension control, especially on vehicles exposed to road salt and… Repairs typically run $900-$2,200. Severity: high.
Owners of lifted or Sasquatch-equipped Broncos have reported front CV axle clicking, grease sling from torn boots, and vibration under load, especially after off-road articulation or suspension modifications. Even on stock vehicles, the steep operating angles on some setups appea… Repairs typically run $600-$1,800. Severity: high.
Broncos with factory cruise control use a brake-pressure-actuated speed control deactivation switch mounted at the master cylinder. Brake fluid can leak past the switch's internal seal into the electrical side, corrode the contacts, and cause overheating that can start a fire, in… Repairs typically run $0-$200. Severity: high.
Multiple Bronco owners report a brief but pronounced rattling or knocking noise on cold start caused by worn or defective cam phasers, often accompanied by timing chain slack. Ford issued service guidance for EcoBoost engines using updated phaser parts. While some vehicles only e… Repairs typically run $1,800-$4,500. Severity: high.
Multiple Bronco owners reported sudden loss of power steering assist, often accompanied by warning messages and very heavy manual steering effort at low speeds. The issue has been tied to failures in the electric power steering system and steering gear/rack assembly, and Ford iss… Repairs typically run $1,800-$3,500. Severity: high.
The electronically controlled E4OD 4-speed automatic behind the V8s is notorious for failing, especially with age, towing, off-road use, or an undersized/overheated cooler. It is heat-sensitive, and a well-documented secondary killer is the brake-light circuit: the PCM watches br… Repairs typically run $2,200-$4,000. Severity: high.
The Molded-In-Color (MIC) hardtop exhibits surface crazing, snakeskin patterns, delamination, and cracking. Issues include peeling headliner, warping around mounting bolts, rattling, and water leaks. Ford acknowledged the issue and implemented Customer Satisfaction Program 21B49. Repairs typically run $0-$2,000. Severity: medium.
The Getrag MT88 7-speed manual transmission exhibits rotational scraping or grinding noises, particularly in cold temperatures below 50°F. The noise occurs in neutral, 1st, and 2nd gears with clutch engaged and may diminish as transmission warms up. Issue traced to 5th and 6th ge… Repairs typically run $0-$500. Severity: medium.
The 10R60 automatic transmission may exhibit harsh or delayed engagement when shifting, particularly from park to reverse when cold. Some vehicles skip gears during deceleration around 28 mph causing lurching. Repairs typically run $0-$300. 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.