IsItAGoodCar
Reliability Guide

Common Problems with the
1999 Lexus IS (XE10)

UK launch of the XE10 IS 200 saloon in May 1999, featuring the 2.0-litre 1G-FE straight-six petrol engine, 6-speed manual or 4-speed automatic, and chronometer-inspired instruments across S, SE, and Sport trims.

What changed for 1999

  • •UK market introduction of the IS 200 saloon with rear-wheel drive and double wishbone suspension
  • •153bhp 2.0-litre 1G-FE DOHC 24-valve straight-six engine with VVT-i
  • •Sport trim featuring 17-inch alloy wheels, limited-slip differential (Torsen LSD), and drilled aluminium pedals

Common MOT watch-outs

  • !Excessive play in front lower suspension ball joints and track rod ends
  • !Corrosion of rear outer sill sections and suspension mounting points
  • !Uneven brake effort or seized rear caliper slider pins
2
Known Issues
1
Serious
1
Moderate
0
Minor

All Known Issues

Front Lower Suspension Ball Joint Wear and Separation

SeriousSuspension & Chassis

The front lower ball joints on the XE10 double-wishbone suspension carry substantial dynamic loads. Over time, the internal nylon seat wears out and the protective rubber boot perishes, allowing water and road grit to enter and accelerate wear. In advanced cases, the ball joint develops severe play and can pull out of its housing entirely, causing the front wheel to collapse into the wing. This is a well-known MOT failure and safety risk on older UK cars.

Est. Repair Cost: £180–£400
Warning Signs:

Clunking or knocking noise from the front wheels over small road bumps, Vague or wander in steering feel at motorway speeds, Creaking sound when turning the steering wheel at low speeds or parking, Uneven feathering or wear on the inside shoulder of the front tyres

What to Inspect:
  • Jack up the front corner and rock the wheel vertically to feel for play in the lower ball joint
  • Inspect the ball joint rubber dust boot for splits, missing retaining clips, or grease leakage
  • Review MOT test history for recurring advisories regarding front suspension pin or bush play
Verified by IsItAGoodCar Research TeamUpdated

Rear Outer Sill and Wheel Arch Structural Rust

ModerateBodywork & Rust

First-generation IS models suffer from serious structural corrosion in the rear outer sills, jacking points, and rear wheel arch seams. Mud and road salt sprayed by the rear tyres collect in the unsealed cavity between the inner arch liner and outer sill panel. In the wet UK climate, moisture sits trapped against the foam sound deadening and untreated metal seams, rotting the sill from the inside out. Once rust bubbles through the exterior paintwork, extensive fabrication and welding are required for MOT compliance.

Est. Repair Cost: £350–£900
Warning Signs:

Visible bubbling or perforation in the paintwork along the sill ends ahead of the rear wheels, Crunching sound when lifting the vehicle on factory jacking points, Flaking rust and road dirt dislodging from behind the rear wheel arch lip, MOT failure for structural corrosion within 30cm of a suspension or seatbelt mounting

What to Inspect:
  • Firmly press along the entire length of the rear sills and jacking points feeling for softness
  • Run fingers around the inside lip of both rear arches to check for hidden rust scaling
  • Inspect the boot floor side wells under the boot carpet for dampness or water ingress
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 1999 Lexus IS (XE10)

  • Check for genuine Sport trim LSD by spinning rear wheels or verifying chassis plate code
  • Inspect the alloy wheels for lacquer peeling and rim corrosion around tyre bead seals
2000
Check a 1999 Lexus IS (XE10) by Registration