2nd Gen Sequoia Troubleshooter

The 3UR-FE's camshaft housings are sealed to the heads with silicone, and on many Sequoias the seal gives up, letting oil run down the back of the engine onto the exhaust. Owners report it at anything from 12,000 miles (fixed under warranty) to 150,000. It burns off, so you smell it before you see it.

1. Find the seam
   Degrease, drive, and look with a light at the rear of each head where the cam housing meets it, above the manifold. Oil along the valve cover edge only is the cheaper valve cover gasket job.
   easy$
2. Rule out neighbors
   The oil filter housing, VVT-i lines and valve cover gaskets drip onto the same manifold. Check them before quoting the big job.
   easy$
3. The repair
   Valve covers, timing cover and chains come off to lift and reseal the cam housings with Toyota FIPG. Independent Toyota shops have quoted owners about $1,650–1,850 for both towers plus valve covers; dealers considerably more. Do both banks at once.
   hard$$$
4. Watch the sensors
   Oil on the air-fuel sensor harness near the manifold causes heater circuit codes. If you get P0031 or P0051 along with the smell, the leak is the root cause.
   easy$

Go deeper: Toyota Sequoia Fluid Capacities & Types (2nd Gen, 2008–2022)

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Same system and same failure as the Tundra: the air switching valves stick open, exhaust moisture ruins the air pumps, and the ECU drops the truck into limp mode. Toyota's 10 year/150,000 mile warranty enhancement has expired on nearly all of them. Bulletin T-SB-0144-14 names the 2014–2015 Sequoia for a software fix when the codes are only P2440/P2442.

1. Codes
   P2440/P2442 are valves stuck open; P2445/P2447 are pumps stuck off; P0418/P0419 are the pump relay circuits. Valve-only codes may be fixable with the ECM reflash on 2014–2015 trucks.
   easy$
2. Inspect pumps and valves
   Rust dust or water at the pump inlets means they are finished. Replace valves and pumps together or the new pump dies the same way. Dealer repairs commonly run $2,000–4,500.
   medium$$$
3. Bypass
   Bypass modules ($150–450) end the limp mode but disable an emissions device, which is illegal for road use under federal law and fails inspections where it is checked. Decide with your state's rules in mind.
   medium$$

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Platinum Sequoias have rear air springs with load leveling. The bags dry-rot and leak, the compressor burns out trying to keep up, and the ride goes soft or harsh. OEM parts are expensive enough that many owners convert to the non-Platinum coil springs and control arms.

1. Overnight sag test
   Measure rear fender height at night and in the morning. A corner that drops overnight is leaking; soapy water on the bags and fittings finds it. A compressor that runs constantly is feeding a leak.
   easy$
2. Compressor and sensors
   No compressor sound at all with a low rear is the compressor, its relay or fuse. A compressor that works with a truck that is still soft or uneven is usually a height sensor or its linkage.
   medium$$
3. Convert to coils
   The non-Platinum rear uses coil springs (48231-0C011 2WD, 48231-0C021 4WD) with matching lower control arms and insulators. Springs run roughly $140–550 a pair plus arms and $300–450 labor, then an alignment. You lose load leveling, so plan on helper springs or airbags if you tow heavy.
   hard$$
4. Repair OEM
   New bags and a compressor keep the leveling. Expect it to cost well over a conversion; owners describe it as very expensive without quoting a figure we can verify.
   medium$$$

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The 3UR-FE water pump commonly weeps between 60,000 and 100,000 miles. The other leak that leaves pink residue, down between the heads, is the valley plate and heat exchanger gasket, a larger job that is best done with the cam towers if those are leaking too.

1. Weep hole
   Look below the pump pulley behind the fan for crust or a wet trail. A weeping pump will fail; schedule it.
   easy$
2. Pressure test
   Hold cap pressure for 20 minutes to find hose, thermostat housing and radiator end tank leaks. Pink residue in the V with a dry pump is the valley plate.
   easy$
3. Pump as a set
   Pump, thermostat and belt, and check the fan bracket bearing. About $400–800 at a shop.
   medium$$
4. Valley plate
   Intake off, plate resealed. Owner quotes run from under $1,000 to about $2,800 depending on what else is done at the same time.
   hard$$$

Go deeper: 2nd Gen Sequoia Maintenance Schedule: 5k to 120k Mile Checklist (2008–2022)

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The Sequoia's power rear window is a signature feature and a known weak point. The regulator cables and tracks rust in salt country, the motor brake locks up, and the plastic tabs on the glass crack. Grinding and popping is the warning; a window that drops into the gate is the end.

1. Listen and look
   Grinding or a pop while the glass moves means cable or track trouble. Pull the inner liftgate panel and look at the regulator tracks for rust and frayed cable.
   easy$
2. Glass tabs
   If the glass has dropped, check the mounting tabs on the glass itself. Cracked tabs mean the glass needs replacing along with the regulator.
   medium$$
3. Replace the regulator
   The current OEM regulator with motor is 69850-0C062 (superseding -0C060), roughly $340–450. Budget about 2.5 hours, lubricate the tracks, and adjust the microswitch so the window stops correctly.
   medium$$

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The Sequoia uses the Tundra's electric booster pump and accumulator. A pump that runs constantly, a pedal that sinks at a stop, or ABS/VSC/TRAC lights with C1252, C1253 or C1256 point to the master cylinder and booster assembly. Check the battery first: C1241 is low voltage, and weak batteries set brake codes on these trucks.

1. Key-on test
   Key on, engine off, the pump should run a few seconds and stop. Cycling every two or three pedal presses means it is losing pressure.
   easy$
2. Battery and wheel sensors
   Charge and load test the battery; check each wheel speed sensor wire for chafe. Either lights the dash without a real brake fault.
   easy$
3. Assembly replacement
   The master cylinder and booster are serviced together. Owner-reported costs run $1,500–2,000 and up, less with a remanufactured unit, and the system needs a Techstream bleed and zero point calibration afterward.
   hard$$$

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Battery and cables first. Past 100,000 miles the starter solenoid contacts are the usual Sequoia culprit, and the starter is buried on the 5.7, so labor is most of the cost.

1. Battery and terminals
   12.4 V or more at rest, clean tight terminals and engine ground. A corroded terminal gives exactly one click.
   easy$
2. Try Neutral
   Cranks in Neutral but not Park: shift position switch.
   easy$
3. Starter
   A tap on the starter while a helper holds the key, or a voltage drop test on the main cable, confirms it. Shop replacement runs about $800–1,250 because of access.
   hard$$

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Recall 21V920 covers the power steering gear on 2008–2022 Sequoias: a leak at the gear can lead to a sudden loss of assist. Dealers inspect and replace it free. Run the VIN before paying for a rack.

1. VIN check
   Confirm 21V920 (Toyota 21TB10/21TA10) status at nhtsa.gov/recalls or a dealer.
   easy$
2. Find the leak
   Fluid inside the rack boots is the rack; fluid at the pump or hoses is not. Check the reservoir level and whether the fluid is dark from running low and hot.
   easy$
3. Outside the recall
   New racks installed at a dealer are reported around $2,600; remanufactured Toyota units installed independently roughly $900–1,400. Flush the system with the rack.
   hard$$$

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