Common problems · 1996–97
Lexus LX 450 problems: 8 things to check
The problems owners and specialists flag most on the Lexus LX 450, the repairs they end up doing and what those cost, plus the years and recalls to watch. Sourced, not scraped.
Lexus LX 450 problems to check before you buy
- Head gasket historyLook for coolant at the head-to-block joint and ask whether the gasket has been replaced. One Expedition Portal regular calls 1FZ-FEs past 150k miles prone to failure and those past 200k very prone. Others think the worry is overblown. Either way, receipts for a properly done head gasket job add real value.
- Knuckle sealsCaked grease and oil on the outside of the steering knuckles means the inner axle seals failed a while ago. Slee suggests pulling the square fill plug on the knuckle. If the grease inside is runny, diff oil is getting into the knuckle.
- Lockers that workIf the truck has the factory lockers, turn them on in low range on a loose surface and make sure they engage. A dead locker is often a seized actuator, which can be rebuilt.
- Cooling system and PHHA replaced radiator or deposits in the overflow bottle can point to past overheating, which is bad news for the head gasket. Ask whether the PHH and the bypass hoses under the intake have been replaced. Use Toyota red coolant.
- Accident and rust historySlee's checklist covers overspray, filler (check with a magnet), uneven panel gaps and missing VIN stickers. Late 80s had a sticker on every body panel. Get underneath and check the frame for pull marks and rust.
- Records over milesForum regulars put service records ahead of mileage. If the driveline, diffs, birfields and bearings haven't been serviced within 150k miles, one Expedition Portal member says to budget about $2,000.
- Hidden wiringLook under the dash below the steering wheel and at extra wires on the battery terminal. A rat's nest of accessory wiring usually means the rest of the work wasn't done properly either.
- Drive itCheck that the transmission shifts smoothly, the brakes don't pull or pulse, the steering is free of noises from lock to lock, and there's no vibration at highway speed. Blue or white smoke on acceleration means walk away.
The repairs Lexus LX 450 owners end up doing
| REPAIR | SYMPTOMS | DIFFICULTY | TIME | COST |
|---|---|---|---|---|
| Front knuckle rebuild and birfield repack | Grease and oil caked on the outside of the knuckle balls, runny grease at the knuckle fill plug, and diff oil migrating into the knuckles. | 3 / 5 | Varies. Allow a weekend for a first rebuild. | Rebuild kit about $126–$130 (Cruiser Corps, Low Range Off-Road). Wheel bearings are extra. |
| PHH (heater hose) replacement | A coolant leak low on the driver's side of the engine, or a sudden loss of coolant that leaves you stranded. Old original clamps are a warning sign on their own. | 2 / 5 | An afternoon. It's easier if the starter is already out. | About $20 in Gates hose and clamps, or a bypass kit for about $45 (owner reports) |
| Head gasket replacement | Coolant loss, overheating, combustion gases in the coolant (confirm with a block test kit) and coolant weeping at the head-to-block joint. | 5 / 5 | Multi-day. The head has to go to a machine shop. | Head machining $185–$650 depending on the work. Gaskets and seals about $260 (2013). One Expedition Portal member put a full shop job at $2,000+. |
| Center diff lock (CDL) switch install | You want to lock the center differential in high range on snow, sand or washboard, but US trucks only lock it automatically in low range. | 1 / 5 | Under 1 hour | $79 for the 1995–1997 Slee kit (TOY1002), per Off-Road.com |
| Power-steering reservoir seal leak | A steady power-steering fluid leak that has been blamed on the hoses or the steering box. | 1 / 5 | ≈ 1 hour | A few dollars in seals |
| Rear axle stud and cone-washer repair | Snapped rear axle-flange studs. | 2 / 5 | ≈ half a day | Parts plus machining |
| Parking brake that won't hold | The handbrake won't hold the truck on a slope, or the lever comes up a long way before it bites. | 2 / 5 | ≈ An hour to adjust; half a day for shoes and hardware | Free to adjust; shoes, struts and hardware if worn |
| Driveline clunk: grease the slip yokes | A clunk or a 'grabbing' feel when you take up drive, shift into gear or get on and off the throttle. | 2 / 5 | ≈ 1–2 hours to pull and grease both shafts | A tube of grease |
Each repair links to a step-by-step guide with tools, part numbers and where to buy the parts.
Take the printable Lexus LX 450 inspection checklist: every check on this page plus the model-specific ones, on one sheet. Get the checklist →
Sourced from owners, specialists and factory documents; full sources are on the Lexus LX 450 guide. Verify torque figures and procedures against the factory service manual (disclaimer).