My IS220D summary of faults....
Main bug bears:
Turbo lag (fixed with diesel tuning box).
5th injector and EGR problems.
Unusable 6th gear.
Agricultural engine and gearbox.
Gearbox had to be replaced as it would not stay in second gear, constantly jumping out. (replacement gear box had same problem to a lesser extent in first gear).
Noisey gearbox, both gearboxes in my lexus had a whine associated with them - if engine revved in neutral smell of burning as box not completely disengaged.
Serpentine belt bearing failure.
Windscreen wipers ineffective.
No reverse parking sensors (even though they installed heated seats and 13 speaker sound system as standard)
Once the battery went flat and the car was locked out, asked Lexus for help, they said bring it to a lexus garage (would have cost a fortune for their time and transport of car), internet said follow some simple instructions and imobiliser worked/reset again.
These count as one problem:
A faulty oxygen sensor in the exhaust
DPF filter blocked or out of range as measured by the DP sensor
Under both conditions above the car enters limp mode - this is EXTREMELY dangerous on a busy dual carriageway loss of all power can be a killer. Happened to me at 5.00AM in fog on the A90 I had to let the car crawl to the nearest layby all the while traffic nearly rear ending me. Then switch engine off and on again and full power for another 5 or six miles before going back to limp mode. All this danger for two superficial sensor warnings. The only way to clear DPF is to screw the engine, all the while having to deal with the dangerous limp mode.
