2004 Lexus LX Problems: 1 Issues Every Owner Should Know
2004 model year · 1,400+ owner reports · Updated April 2026
According to Au7o's analysis of 1,400+ owner reports, the 2004 Lexus LX has 1 documented known issues, with 1 rated critical. The most serious is Timing Belt Hydraulic Tensioner Failure ($800-$1,800 repair). The most commonly reported issue is Timing Belt Hydraulic Tensioner Failure with 1,400 owner reports. Across all issues, repair costs range from $800 to $1,800. DIY maintenance guides at au7o.io.
All 1 Known Issues
On the 2000-2007 Lexus LX 4.7L 2UZ-FE, the hydraulic timing belt tensioner on the 2UZ-FE V8 can lose hydraulic pressure, allowing the timing belt to develop slack. If the belt jumps timing, catastrophic valve damage occurs in this interference engine. The tensioner should be replaced every time the timing belt is serviced, typically at 90,000-mile intervals.
Common Symptoms
- Ticking or rattling noise from front of engine
- Engine misfires at startup
- Visible timing belt fraying during inspection
- Engine suddenly stops running (catastrophic failure)
- Rough idle that worsens over time
How to Fix
Replace the timing belt, tensioner, idler pulleys, and water pump as a complete kit every 90,000 miles. Always use OEM or high-quality aftermarket timing belt kit (Gates or Continental). This is a critical maintenance item — do not extend the interval beyond 90,000 miles or 9 years.
What Owners Are Using
Parts and tips from 1,400+ owners who fixed this issue
- UpgradeGates TCKWP298 timing belt kit with water pump — complete kit includes belt, tensioner, idler pulleys, and water pump. Everything you need in one box at a significant savings over buying parts individually. (Gates #TCKWP298)