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Thanks Steve, didn't need to use a splitter the ball joint was already in two parts with the wheel jammed in the wheel arch

Got a 2003 GS300. Had a similar problem. Got it on a ramp and my mechanic checked it over, no sign of any wear in the steering parts or suspension. Over the course of time I replaced front shox, all brake rotors and pads, tyres all-round. Tracked and balanced twice and the problem persisted, got worse even. Last Tuesday driving at 80 kph on a country road kapow, crack the front driverside steering ball joint let go, bit scary. Slithered to a halt after about 100 meters. Got away with ball joints * 2 (replaced both) , new tyre (old one left it's rubber on the road), tracking and a slightly bent wing. Steering, braking suspension are lovely now. Ball joints are cheap (about 140 a pair ) and easy to do, but make sure you get it tracked. My only problem now is that I've got the 'ABS', ' VSC' and 'VSC off' lights lit up all the time, with no diagnostic codes found. Tried the paper clip trick to no avail. Any ideas anyone ? Gerry Wexford, Ireland

Many thanks Colin, makes the fix much more simple. Did a bit of research this morning, I take it that I'm looking for lambda oxygen sensors like in this link ; http://www.micksgarage.com/search.aspx?fffBrand=Denso&fffDepartment=Lambda%20Oxygen%20Sensors&fffMake=lexus&fffBasemodel=lexus%20gs&fffModelDescription=gs%201997%20to%202005&ffftd_car=300&fffBHP=219 or perhaps here ; http://www.mister-auto.ie/en/lambda-sensor/bosch-0-258-986-607_g3922_a0300!258!986!607.html Gerry

Quite new to my Lexus, anyone got a diagram as to where I can find these sensors. Thanks Gerry Wexford

Yay , just replaced the front centre anti-roll bar bushes and not a thump or grumble to be heard. Success. Only problem now is I've got P0135 & P0141 fault codes (O2 Sensor Heater Circuit Bank 1 Sensor 1 / 2), groan.

Like many on this forum I have a slight knock on poor roads in my GS (2003 300 sport). Replaced shox, discs, pads etc. My mechanic can find no wear on bushes, ball joints etc. Had a 190 merc some years back similar annoying knock. Replaced everything at great expense no solution. Turns out that it was the engine mounts were a bit worn, so it might be worth checking out engine transmission mounts on the Lexus. By the way I've had a long line (25 odd years) of Mercs, still have a 190e and a classic 350 slc but as a recent convert to the Lexi, I'm hooked.

Tried any breakers ?

I've got a 2003 GS300 sport, had the same story. Replaced all tyres, got worse. In so far as it was intermitant I figured it might be front brake related so I shopped around and bought new front discs and pads (less than 90 euro at http://www.mister-auto.ie), fitted them, and it's perfect. Worth a shot at the price. Gerry Wexford