1990-2025 model years · 13,726+ owner reports · Updated October 2026
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According to Au7o's analysis of 13,726+ owner reports, the 1990-2025 Toyota 4Runner has 44 documented known issues, with 12 rated critical. The most serious are Takata Airbag Recall ($0-$0 repair), Frame Rust and Corrosion ($200-$15,000 repair), Secondary Air Injection Pump/Valve Failure Triggering Limp Mode on 4.7L V8 ($900-$3,000 repair), Front Lower Ball Joint Wear and Separation (3rd Gen) ($400-$950 repair), 4.7L V8 timing belt wear and failure (owner reports), Brake booster pump and accumulator failure with warning lights and alarm (owner reports), 2025 4Runner Instrument Panel Startup Software Fault — Missing Speed and Warning Lights (Recall 25V595000), Lower Ball Joint Wear/Separation on 3rd-Gen Front Suspension ($500-$1,200 repair), 3.0L 3VZ-E V6 Head Gasket Failure (Coolant Loss, White Smoke, Rough Idle) — SSC V06 / Extended Warranty ($200-$2,500 repair), 3.0L V6 (3VZ-E) Head Gasket Failure — Toyota Special Service Campaign V06 ($1,400-$2,800 repair), Rocker Panel, Rear Wheel-Arch and Pinch-Weld Rust ($600-$3,500 repair) and 4.0L V6 head gasket leaking coolant into a cylinder (owner reports). The most commonly reported issue is Takata Airbag Recall with 8,976 owner reports. Across all issues with published estimates, repair costs range from $20 to $15,000. DIY maintenance guides at au7o.io.
EXTERIOR LIGHTING:HEADLIGHTS
Southeast Toyota Distributors, LLC (SET) is recalling certain 2022 Toyota 4Runner vehicles. The driver's side high beam may be inoperable after the installation of accessory fog lights. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
ELECTRICAL SYSTEM: INSTRUMENT CLUSTER/PANEL
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2023-2024 Toyota Venza, 2023-2025 RAV4 Prime, RAV4, Highlander, GR Corolla, Crown, 2024-2025 Lexus TX, LS, Toyota Tacoma, Grand Highlander, and 2025 Lexus RX, Toyota Crown Signia, Camry, RAV 4 Plug-in Hybrid (PHEV), and 4 Runner vehicles. Due to an error in the instrument panel software at vehicle startup, the instrument panel may fail to display vehicle speed, brake system, and tire pressure warning lights.
EQUIPMENT:OTHER:LABELS
Southeast Toyota Distributors, LLC (SET) is recalling certain 2023 Toyota 4Runner vehicles. The load carrying capacity modification label states the incorrect load carrying capacity, which can result in an overloaded vehicle. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 110, "Tire Selection and Rims."
EQUIPMENT:OTHER:LABELS
Southeast Toyota Distributors, LLC (SET) is recalling certain 2020-2022 4Runner vehicles equipped with 20-inch Black Gunner Wheels. The load carrying capacity modification labels are incorrect. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 110, "Tire Selection and Rims."
EQUIPMENT:OTHER:LABELS
Gulf States Toyota, Inc. (GST) is recalling certain 2022 4Runner, Tacoma, Highlander, and Highlander Hybrid vehicles. The load carrying capacity modification labels may not be permanent and can fade, becoming illegible. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 110, "Tire Selection and Rims."
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According to Au7o's analysis of 13,726+ owner reports, the 1990-2025 Toyota 4Runner has 44 documented issues. The most frequently reported are: Takata Airbag Recall, Frame Rust and Corrosion, Secondary Air Injection Pump/Valve Failure Triggering Limp Mode on 4.7L V8. Of these, 12 are rated critical and should be addressed promptly.
The 1990-2025 Toyota 4Runner has 44 known issues documented across 13,726+ owner reports. 12 issues are rated critical: Takata Airbag Recall and Frame Rust and Corrosion and Secondary Air Injection Pump/Valve Failure Triggering Limp Mode on 4.7L V8 and Front Lower Ball Joint Wear and Separation (3rd Gen) and 4.7L V8 timing belt wear and failure (owner reports) and Brake booster pump and accumulator failure with warning lights and alarm (owner reports) and 2025 4Runner Instrument Panel Startup Software Fault — Missing Speed and Warning Lights (Recall 25V595000) and Lower Ball Joint Wear/Separation on 3rd-Gen Front Suspension and 3.0L 3VZ-E V6 Head Gasket Failure (Coolant Loss, White Smoke, Rough Idle) — SSC V06 / Extended Warranty and 3.0L V6 (3VZ-E) Head Gasket Failure — Toyota Special Service Campaign V06 and Rocker Panel, Rear Wheel-Arch and Pinch-Weld Rust and 4.0L V6 head gasket leaking coolant into a cylinder (owner reports). 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 Toyota 4Runner issues range from $0 to $15,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Takata Airbag Recall, 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 Toyota 4Runner. 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 1990-2025 Toyota 4Runner with 44 documented issues documented across 13,726+ owner reports.
Takata airbag inflators can explode during deployment, sending metal shrapnel at occupants. This is a critical safety recall affecting millions of vehicles. The driver and/or passenger airbag inflators need replacement. Multiple deaths and injuries have been linked to this defect… Repairs typically run $0-$0. Severity: high.
The frame on 4Runners, especially in northern/salt belt states, can develop severe rust and corrosion. This is a safety concern as the frame provides structural integrity. Toyota had a frame replacement program for some Tacomas/Tundras but 4Runners were not included. Repairs typically run $200-$15,000. Severity: high.
The 4.7L 2UZ-FE V8 used in later 4th-generation 4Runners is known for secondary air injection system failures involving the air pump and switching valves. When the system sticks or fails electrically, the truck may illuminate the check engine light and enter reduced-power or limp… Repairs typically run $900-$3,000. Severity: high.
The front lower ball joints on 3rd-generation 4Runners (1996-1999, sharing the same part through 2002) wear out and, in worst cases, separate from the steering knuckle, causing loss of steering control and front-corner collapse. Toyota issued a formal safety recall/Special Servic… Repairs typically run $400-$950. Severity: high.
The 4.7L V8 uses a timing belt rather than a chain. Owners warn that a belt left past its replacement interval can fail, and one 2004 owner's belt shredded and jumped timing after he ignored a small coolant leak near it. Owners disagree on the consequence: many, and a repair manu… Severity: high.
Owners of fourth-generation 4Runners report the brake booster pump and accumulator failing: the pump runs continuously or squeals, the ABS, BRAKE, VSC and TRAC warnings light with a loud continuous alarm, and one owner needed much harder pedal pressure to stop. Applies to: 2003-2… Severity: high.
The 2025 4Runner — the first model year of the new generation, with its full digital instrument panel — is included in NHTSA recall 25V595000. Toyota's stated cause is an error in the instrument panel software at vehicle startup, after which the panel may fail to display vehicle… Severity: high.
On late 3rd-generation 4Runners, the front lower ball joints are a well-documented failure point and can develop excessive play or separate without much warning. Toyota issued a safety recall because separation can cause loss of steering control and front wheel collapse. Owners c… Repairs typically run $500-$1,200. Severity: high.
The 3.0L 3VZ-E V6 used in the 2nd-generation 4Runner (and its 1990-1994/early-1995 build window) is notorious for premature cylinder head gasket failure. The original-design gasket leaks combustion and coolant, causing progressive coolant loss, chronic overheating, unusually roug… Repairs typically run $200-$2,500. Severity: high.
The first-generation Toyota V6, the 3.0L 3VZ-E fitted to 1990-1995 4Runners (and the companion Pickup/T100), is notorious for blown head gaskets. The root cause Toyota identified was excess heat around the #6 cylinder (the exhaust crossover area) combined with the original gasket… Repairs typically run $1,400-$2,800. Severity: high.
1990s 4Runners are structurally durable but very prone to age- and salt-driven body rust, especially at the rocker panels, lower quarter/rear wheel arches, and the pinch-weld seams. On 3rd-gen trucks (1996-1999) the factory sunroof drain lines route into the rocker cavities, and… Repairs typically run $600-$3,500. Severity: high.
Owners of early fourth-generation 4Runners with the 4.0L V6 report the head gasket leaking coolant, most often into cylinder 6, causing coolant loss and misfires. Applies to: 2003-2006 Toyota 4Runner with the 4.0L 1GR-FE V6. The owner reports linked here are from 2003, 2004 and 2… Severity: high.
The KDSS hydraulic suspension system can develop leaks at the hydraulic lines and accumulators, especially in areas with road salt. The system helps reduce body roll on-road while allowing articulation off-road. Corrosion of the KDSS lines is common in northern states. Repairs typically run $300-$4,000. Severity: medium.
The A/C compressor can fail prematurely, often sending metal debris throughout the system. When the compressor fails, the entire A/C system typically needs to be flushed and the condenser, drier, and expansion valve replaced along with the compressor to prevent repeat failure. Repairs typically run $1,200-$2,500. Severity: medium.
The starter on 2010-2022 4Runners is prone to corrosion, and if corrosion migrates into the starter relay/solenoid contacts it can cause intermittent no-crank (a single click or nothing on key turn) and, in some cases, additional driveability gremlins. Because the starter sits lo… Repairs typically run $150-$500. Severity: medium.
Owners of fourth-generation 4Runners report power steering whine with dark, old fluid and choppy steering, and fluid leaks at hose connections that can empty the reservoir. Applies to: 2003-2009 Toyota 4Runner. The owner reports linked here are from fourth-generation trucks, one… Severity: medium.
Both V6 4Runners (3.0L 3VZ-E and 3.4L 5VZ-FE) use a water pump that is driven by, and buried behind, the timing belt. The pump's seal weeps coolant with age/mileage, and because it sits behind the timing cover the leak is easy to miss until the truck overheats or drips coolant fr… Repairs typically run $600-$1,200. Severity: medium.
4WD-equipped 4Runners use an Automatic Disconnecting Differential: a vacuum-operated actuator on the front differential slides a collar to couple the passenger-side front axle when 4WD is selected. With age the vacuum supply hoses crack, the vacuum switching valve/solenoid or the… Repairs typically run $150-$650. Severity: medium.
The 5VZ-FE water pump is driven off, and buried behind, the timing belt. Its shaft seal wears with age and mileage and coolant begins seeping from the pump's weep hole — the designed early-warning drip before the bearing fails. Because accessing the pump requires the same teardow… Repairs typically run $150-$900. Severity: medium.
On the 3rd-gen 4Runner's 3.4L 5VZ-FE V6, the two knock sensors sit in the engine valley beneath the upper and lower intake manifolds, and their sub-wiring harness bakes over time. The harness insulation becomes brittle and crumbles, opening the circuit and setting P0325 (knock se… Repairs typically run $150-$900. 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.
