Lexus IS (XE20) Common Problems & Reliability
The XE20 IS was the generation that made Lexus a genuine BMW 3 Series alternative in the UK. The IS 250 petrol is usually a very safe buy, but the IS 220d diesel has a much weaker reputation thanks to emissions and cooling-related trouble.
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Detailed fault breakdown, symptoms, and estimated repair bills by production year.
Most Common Lexus IS (XE20) Faults & Repair Costs
IS 220d DPF and EGR Trouble
Short-trip use can clog the diesel particulate filter and EGR system, causing limp mode, warning lights and stacked repair bills on the already less-desirable 220d.
DPF warning light, Frequent regeneration, Poor performance or limp mode
- Ask what kind of trips the car usually does
- Check for DPF or EGR invoices
- Look for smoke or warning lights once fully warm
IS 220d Head Gasket and Cooling Trouble
The 2.2 diesel can also develop more serious cooling-system and head-gasket issues, which is one reason UK buyers generally prefer the V6 petrol.
Coolant loss, Pressurised coolant hoses, White smoke on startup
- Check the coolant level from cold
- Look for repeated topping-up or fresh coolant in the boot
- Watch for bubbling in the header tank after a hard drive
Rear Brake Caliper and Disc Corrosion
Age and low annual mileage can leave the rear calipers sticky and the discs rusty, even on otherwise very dependable petrol cars.
Inner rear discs heavily rusted, One rear wheel hotter than the other, MOT advisories for binding or pitted brakes
- Inspect the inside faces of the rear discs
- Check for a lip or pitting
- Feel for excess heat from one rear wheel after the drive
Buying a used Lexus IS (XE20)? Always check for hidden finance and write-off history.
Mechanical problems are only half the battle. Over 1 in 3 UK used cars checked have unpaid finance or accident write-off records that could cause you to lose the car or thousands in value.