BOXY TRUCKS
Common problems · 2010–24

5th Gen 4Runner problems: 8 things to check

The problems owners and specialists flag most on the Toyota 4Runner 5th Gen, the repairs they end up doing and what those cost, plus the years and recalls to watch. Sourced, not scraped.

Read the full 5th Gen 4Runner guideYears to avoidBiggest tireSpecs & fluids

5th Gen 4Runner problems to check before you buy

  1. Frame and underbody corrosionSalt-belt and coastal trucks need a proper crawl underneath: frame rails, crossmembers, suspension mounts and the KDSS hard lines along the frame. Surface scale can be cleaned and treated (Trail4R's corrosion guide walks through it); flaking, holed metal is a different conversation.
  2. KDSS healthOn Trail and TRD Off-Road trucks, look for wet KDSS cylinders, weeping lines or a truck that leans. Owners on Expedition Portal describe leaking cylinders as difficult and expensive to fix. If it's lifted, ask how the KDSS was handled — Trail4R notes most lifts aren't designed around it.
  3. Open recallsRun the VIN at NHTSA. The big ones are the Takata passenger airbag inflator recalls covering 2010–2016 4Runners (19V-005, 19V-741 and earlier campaigns) and the Denso low-pressure fuel pump recalls for 2014–2015 (20V-012) and 2018–2019 trucks (20V-682).
  4. Lift quality and CV bootsA lifted IFS truck runs steeper axle angles. Check for torn CV boots and grease slung around the wheel well, aftermarket upper control arms on bigger lifts, and an alignment record. Trail4R's writer tore CV boots repeatedly from excessive droop until fitting limit straps.
  5. Front axle sealsGear oil where the CV axle enters the front differential means a leaking axle seal. It's a DIY job, but budget for it and check the diff level.
  6. Driveline fluid historyAsk for transmission (Toyota ATF WS only), differential and transfer case service records. Toyota's severe-service schedule changes diff oil every 15,000 miles when towing or loaded; many owners just do everything at about 30,000.
  7. Rear window and liftgateRun the power rear glass all the way down and up. A window that bounces back as if obstructed often just needs re-initialising or its tracks cleaned (see repairs), but a dead motor or regulator is a bigger job.
  8. Pick your yearAutotrader says the fifth gen has no major issues and recommends a late truck, preferably 2020–24 (TSS-P standard and CarPlay). 2014+ gets the facelift, better brake lines and Trailer Sway Control. SlashGear flags 2013–2016 for higher complaint and recall counts. The 2.7 four was 2WD-only and 2010-only.

The repairs 5th Gen 4Runner owners end up doing

REPAIRSYMPTOMSDIFFICULTYTIMECOST
Automatic transmission drain and fillDue on mileage or unknown history; dark or burnt-smelling fluid. There is no dipstick — the level is set at temperature through a check plug.3 / 5Trail4R's author budgeted about 6 hours including parts runs≈ $174 in fluid and parts (Trail4R, Hawaii prices)
Front and rear differential + transfer case fluidsDue at 15,000 miles under severe service (towing, roof loads) per Toyota, or at whatever interval you set — Trail4R's author does all driveline fluids every 30,000.2 / 5A morningFluids and crush washers; Toyota transfer fluid runs $60–90 per litre (Trail4R)
Front axle (differential-side) sealGear oil weeping where the CV axle enters the front differential; a puddle under the front of the truck.3 / 5Half a dayParts plus a refill of gear oil
CV boot replacement (inner and outer)Grease flung around the wheel well, a split boot, clicking on turns once dirt gets in. Lifted trucks with excessive droop tear boots on the lower control arm.4 / 5A day; Trail4R's first axle removal alone took 2 hoursOEM boot kit plus grease; a shop if the axle won't release
Aftermarket upper control armsAfter a lift: out-of-spec caster/camber, upper ball joint at its angle limit, or you're installing coilovers anyway.3 / 5An afternoon with a helperArms plus a professional alignment
Brake pads and rotorsSteering-wheel shake under braking (warped rotors — Trail4R blamed cold water crossings), noise, thin pads.2 / 5≈ 4–6 hours front and rear with two people (Trail4R)Parts plus your Saturday
Rear hatch window won't close (re-initialise and clean)The rear glass bounces back down as if it found an obstruction, or stays down. Common after a battery disconnect or an obstruction event.1 / 5≈ 15 minutesFree, unless the motor or regulator is actually dead
Propeller shaft greasingDue every 5,000 miles on dirt or dusty roads, or when towing/heavily loaded, per Toyota's schedule as quoted by Trail4R. Dry joints may pop when greased.1 / 5≈ 1 hourA tube of grease

Each repair links to a step-by-step guide with tools, part numbers and where to buy the parts.

5th Gen 4Runner recalls and service bulletins

Check any VIN for open recalls at nhtsa.gov/recalls ↗, or see the recall tracker.

Owner questions about 5th Gen 4Runner reliability

Which years should I buy or avoid?

There's no bad engine year, so buy on condition. Autotrader says the fifth generation has no major issues of concern and recommends a late truck, preferably 2020–2024, which get TSS-P safety tech and CarPlay; it's 'OK' with 2013–2015 and notes owner reports of brake, electrical, rust and paint gripes on 2010–2012. SlashGear singles out 2013–2016 for higher complaint and recall counts. Whatever the year, confirm the Takata airbag (2010–2016) and fuel pump (2014–2015 and 2018–2019) recalls are closed.

SOURCE · AUTOTRADER · SLASHGEAR · NHTSA
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Sourced from owners, specialists and factory documents; full sources are on the 5th Gen 4Runner guide. Verify torque figures and procedures against the factory service manual (disclaimer).

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