The 2018 Sequoia is built on the proven Tundra platform with the 5.7L 3UR-FE V8 (4.6L was rare by 2018). Generally reliable, but secondary air injection problems, frame rust in salt states, transmission cooler line failures, and power steering rack leaks are the main headaches on aging examples.
Secondary Air Injection System Failure (P0410/P0418 codes)
Common · medium severity
Typical onset: 80,000-140,000 mi
Symptoms: Check engine light with P0410, P0418, P0419 codes, Failed emissions test in states that test OBD-II, Air pump whine or complete silence on cold starts, Rusty/seized air switching valves
Fix: Air pump itself ($400-600 parts) fails less often than the switching valves and hoses that rot out. Full system refresh including valves, hoses, and pump runs 4-6 hours labor. Many owners delete the system where legal, saving future hassle.
Estimated cost: $800-1,800
Transmission Cooler Line Corrosion and Leaks
Common · high severity
Typical onset: 90,000-150,000 mi
Symptoms: ATF puddles under front of vehicle, driver side, Low transmission fluid without obvious external leak on dipstick check, Burnt ATF smell if driven low on fluid, Visible corrosion on steel cooler lines at frame rail
Fix: Steel cooler lines rust through where they contact the frame, especially in salt states. Replace both lines preventatively (they're cheap), plus fresh ATF flush. 2-3 hours labor if caught early; if the transmission was run low, you're looking at potential internal damage and rebuild territory ($3,500-5,500).
Estimated cost: $400-800
Power Steering Rack Leaks
Occasional · medium severity
Typical onset: 100,000-160,000 mi
Symptoms: PS fluid drips from bellows boots, Groaning when turning at low speed, Fluid level drops in reservoir, Rack boots wet with fluid
Fix: Inner seal failure is typical. Rack replacement is 4-5 hours labor; alignment required after. OE racks are $800-1,200; remans are half that but quality varies. This is the reason for Toyota's 2019-2020 steering rack recall—check if yours applies.
Estimated cost: $1,200-2,000
Frame Rust (Northern/Salt Belt States)
Occasional · high severity
Symptoms: Surface rust advancing to perforation on rear crossmember and outriggers, Failed state safety inspection due to structural rust, Visible scale and flaking on frame behind rear wheels, Rust jacking around rivet locations
Fix: Sequoias built through 2019 used the same frame design as Tundras with known corrosion issues. No factory recall for Sequoia like there was for Tundra/Tacoma. Severe cases require frame section replacement or total loss. Catch it early: wire brush, treat with Fluid Film or Woolwax annually. Once perforated, repair is 15-25 hours for section replacement.
Estimated cost: $2,500-6,000
Exhaust Manifold Stud Failures and Ticking
Occasional · low severity
Typical onset: 120,000-180,000 mi
Symptoms: Ticking/tapping noise from engine bay on cold start, Exhaust leak smell in cabin with HVAC on, Visible soot streaks on manifold, P0420 code if leak affects O2 sensor reading
Fix: Exhaust manifold studs corrode and snap, causing leaks. Not unique to Sequoia but common on high-mileage 5.7L engines. Repair requires manifold removal, stud extraction, and retorque. If studs are badly corroded, you're drilling/heli-coiling. Bank 1 (passenger side) is easier; bank 2 requires moving accessories. 3-6 hours depending on stud condition.
Estimated cost: $600-1,400
Brake Booster and Master Cylinder Vacuum Leaks
Rare · high severity
Typical onset: 150,000+ mi
Symptoms: Hard brake pedal requiring excessive force, Hissing sound near brake pedal or firewall, Rough idle or stalling when braking, Check engine light with lean codes (P0171/P0174)
Fix: Brake booster diaphragm tears or check valve fails, creating vacuum leak. Master cylinder seal can also fail. Booster replacement is 3-4 hours labor; master cylinder adds another hour. Critical safety item—don't defer if pedal feel changes.
Estimated cost: $800-1,500
Owner tips
Undercoat and rust-proof the frame annually if you're in snow/salt country—this prevents the biggest catastrophic issue.
Inspect transmission cooler lines at every oil change; replace them proactively at 100k miles if you see any surface rust.
Secondary air system can be deleted in non-emissions states; costs $300-500 and eliminates future check-engine codes.
Change transmission fluid every 60k miles despite Toyota's 'lifetime' claim—the A750F doesn't tolerate neglect.
Solid truck if you dodge the rust—southern/western examples are great buys; salt-belt trucks need thorough frame inspection before purchase.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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STEERING:HYDRAULIC POWER ASSIST SYSTEM · 21E103000
2021-12-23
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain JTEKT power steering gear assembly service parts for 2007-2021 Tundra and 2008-2022 Sequoia, part numbers 44250-0C160, 44250-0C131, 44250-0C170, and 11250-0C121. The power steering gear assembly may have been manufactured incorrectly, which can result in an oil leak.
Consequence: An oil leak may cause a sudden loss of power steering assist, increasing the risk of a crash.
Remedy: Dealers will inspect and replace the power steering gear assembly, free of charge. Owner notification letters were mailed on February 17, 2022. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's number for this recall is 21TH01.
STEERING:HYDRAULIC POWER ASSIST SYSTEM · 21V920000
2021-11-23
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2008-2022 Sequoia and 2007-2021 Tundra vehicles. The power steering gear assembly may have been manufactured incorrectly, which can result in an oil leak.
Consequence: An oil leak may cause a sudden loss of power steering assist, increasing the risk of a crash.
Remedy: Dealers will inspect and replace the power steering gear assembly as necessary, free of charge. Owner notification letters were mailed on January 21, 2022. Owners may contact Toyota customer service at 1-800-331-4331. Toyota's numbers for this recall are 21TB10 and 21TA10.
Toyota Motor Engineering & Manufacturing (Toyota) recalled certain 2018-2019 4Runner, Highlander, Camry, Land Cruiser, Sequoia, Sienna, Tacoma and Tundra, and Lexus RC 300, RC 350, GS 350, GX 460, IS 300, LC 500, LS 500, LX 570, RX 350L, and 2019 Toyota Avalon and Corolla, and certain Lexus NX 300, and ES 350 vehicles on January 13, 2020.
On March 4, 2020, Toyota expanded the recall to include certain 2014-2015 Toyota 4Runner and Land Cruiser, 2018 Avalon, Corolla, 2014 FJ Cruiser, 2017 Sienna and Lexus 2018 ES 350, 2018-2019 GS 300, 2013-2014 GS350, 2014-2015 GX 460, IS 350 and LX 570, 2014 IS F, 2018-2019 IS 350, LC 500H and LS 500H, 2013-2015 LS 460, 2015 NX 200T and RC350, 2017 RC 200T and RX 350. Toyota also removed the 2018-2019 Toyota 4Runner and Land Cruiser and 2018-2019 Lexus GX 460 and LX 570 and 2019 NX300 from inclusion in this recall. On March 19, 2020, Toyota expanded the recall to include 2015 Lexus GS350 vehicles. The low-pressure fuel pump inside the fuel tank may fail.
Consequence: If the fuel pump fails, the engine can stall while driving, increasing the risk of a crash.
Remedy: Toyota will notify owners, and dealers will replace the fuel pump, free of charge. The recall began May 4, 2020. Owners may contact Toyota customer service at 1-888-270-9371 or Lexus customer service at 1-800-255-3987. Toyota's numbers for this recall are 20TB02 and 20TA02 for Toyota vehicles and 20LB01 and 20LA01 for Lexus vehicles.
ELECTRICAL SYSTEM:SOFTWARE · 18V685000
2018-10-04
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2018-2019 Toyota Tundra and Sequoia vehicles and 2019 Toyota Avalon and Avalon Hybrid vehicles. The air bag electronic control unit (ECU) may erroneously detect a fault during the vehicle start-up self check. If this occurs, the ECU may not deploy the airbags as intended, in the event of a crash. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 208, "Occupant Crash Protection," and 214, "Side Impact Protection."
Consequence: If the air bags do not deploy as intended, it can increase the risk of injury in a crash.
Remedy: Toyota will notify owners, and dealers will update the software for the air bag ECU, free of charge. The recall began October 26, 2018. Owners may contact Toyota customer service at 1-888-270-9371. Toyota's number for this recall is J0X. Note: 18V-122 was superseded by this recall. The software remedy also includes the updates to the software for 18V-122.
ELECTRONIC STABILITY CONTROL (ESC) · 18V122000
2018-02-20
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2018 Toyota Tundra and Sequoia vehicles. Electrical interference within the power supply circuit may cause the vehicle's electronic stability control system to be deactivated. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 126, "Electronic Stability Control Systems."
Consequence: Deactivation of the vehicle stability control system can increase the risk of a crash in certain conditions.
Remedy: Toyota will notify owners, and dealers will update the vehicle's software, free of charge. The recall began March 14, 2018. Owners may contact Toyota customer service at 1-888-270-9371. Toyota's number for this recall is J0H. Note: This recall has been superseded by 18V-685. The software remedy for 18V-685 includes the updates to the software for this recall.
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