EraVerdict: The car that made Lexus. A well-serviced 1UZ will outlast the body — buy on timing-belt records, leak-free cooling, and a quiet suspension.
At a glance
Risk 2/5 Market: Bulletproof luxury barge
Must-have records:
- Timing belt, water pump, idlers, tensioner together
- Coolant service
- Suspension bushing / ball-joint work
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Parts & tools: Shop parts at Summit Racing.
Buy-risk rundown
| Issue | Symptom | How to check | Typical cost (as of Nov 2026) |
|---|---|---|---|
| Timing belt + water pump service | Belt noise; coolant weep at pump | Demand ~90k mi / 7-year service proof | Belt job ~$1,056–$1,350 (RepairPal; pump/tensioners often extra) [1] |
| Water pump weep hole / coolant leaks | Dried coolant at pump | Inspect pump and hoses | Often done with the belt; standalone cost not yet verified [2][3] |
| Valve-cover and timing-cover oil leaks | Oil smell, wet covers | Visual inspection | Not yet verified [2] |
| Front suspension bushings / ball joints | Wander, vibration ~60–65 mph | Shake-down test drive; lift check | Not yet verified [2][4] |
| Aging electronics / power accessories | Windows, seats, air suspension (some years) | Full function check | Not yet verified [4] |
Cost figures checked against the sources below in Nov 2026. Bracketed numbers refer to the source list.
Notes
- UCF10 (1990–94) vs UCF20 (1995–2000): later cars are generally nicer to live with, but both share the 1UZ reputation.
- ClubLexus owner guides stress buying the car with paperwork over the lowest-mile orphan [2].
Before you buy
Use our printable pre-purchase inspection checklist and get a PPI from a marque specialist.
Sources
- RepairPal, Lexus LS400 timing belt replacement cost (accessed Nov 2026)
- ClubLexus, Unofficial LS400 buyer and owner's guide (accessed Nov 2026)
- Lexus Owners Club, water pump weep discussion (accessed Nov 2026)
- Autocar, Lexus LS400 used buying guide (accessed Nov 2026)
Last updated 2026-11-05. Costs vary by region and shop.
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