Buyer Research

2021 Lexus IS — Should You Buy One?

Typical asking price: $29,000–$40,000. This is one of the more reliable vehicles in its class — here's what to watch for anyway.

Deciding between model years? Compare the 15 Lexus IS years we've written up →

Kestrel Take

Three complaints and no recall is not a record, it is a rounding error, and we will not dress it up as a reliability rating in either direction. The 2021 is the refreshed IS — new sheet metal and a retuned chassis over the same engines and gearboxes as 2020 — and the one complaint with any detail is a plastic oil filter housing cap that cracked during an oil change at an independent shop. What we can say is what carried over: the rear-drive IS 300 keeps the 2.0L turbo four, the IS 300 AWD and IS 350 keep the 3.5L V6, and the family's appetite for rear tires came with them. So the checks are the same as the year before, just on a car still young enough that a Lexus dealer service file should exist and be complete. Ask for it, read it, and pay for the car, not for the silence.

What we checked

Checked against public records, 2026-09-25

NHTSA holds 3 owner complaints for the 2021 Lexus IS, and no recall campaigns.

That is too small a record to read a pattern from, so we are not going to pretend otherwise — with numbers this low one owner moves the percentage by a lot. What has been filed is grouped under the engine (1). Treat those as things to look at, not as the vehicle's known weaknesses. A thin file usually means few of these were sold or few owners filed. It is not evidence the vehicle is trouble-free, and the issues below are our own research rather than a reading of this record.

Counts come from the NHTSA complaint and recall database — free, public, and worth checking yourself.

Known Issues for the 2021 Lexus IS

Ranked by wallet impact. These are documented, recurring problems — not freak accidents. How we decide that.

Plastic oil filter housing cap cracks when the filter is changed — a $55 part that stops an oil changeLow

The one detailed complaint on this car: during an oil change at an independent shop the cap on the cartridge oil filter housing cracked, and the mechanic had to source a replacement from a Lexus dealer at $55 for the part. Toyota and Lexus use a plastic cap on this housing across many models, and it cracks when a shop uses the wrong tool or overtightens it; the drain plug in the cap also strips. It is cheap, but a cracked cap leaks oil onto a hot engine, and a shop that cracked it and did not tell the owner is worse than the part. Look under the car at the filter housing for fresh oil weeping from the cap, and ask who has been doing the oil changes. A billet aluminium replacement cap is a common upgrade.

Repair cost (estimate): $50–$150 for the cap; $80–$180 fitted with an oil change

Source: NHTSA complaints filed under the engine (1).

IS 300 RWD's 2.0L turbo: buy on the oil and coolant history, and prefer the V6 if the price is closeMedium

The rear-drive IS 300 uses the 8AR-FTS turbo four, six years into production by 2021. Its port-plus-direct injection keeps the intake valves cleaner than the old IS 250 managed, but the turbo's cooling circuit and its dislike of stretched oil intervals are what owners elsewhere associate with turbo rattle and coolant loss; intermittent misfires that resist diagnosis have also been reported on this engine on the year before. None of that is on this car's record and we are not claiming it is. Check for synthetic oil changes at 10,000 miles or less, a coolant reservoir that is full and pink, and after a hard run let it idle with the hood up and listen at the turbo. The 3.5L V6 in the IS 300 AWD and IS 350 has the longer, plainer service history.

Repair cost (estimate): $300–$900 for coolant lines or a gasket; $1,500–$2,800 for a turbocharger

Source: not yet checked against public records.

Rear tires wear the inside shoulder early, and the 2021's bigger wheels cost more to replaceMedium

The refreshed IS came with 18-inch wheels on most trims and 19s on the F Sport, on a rear suspension that runs enough negative camber to wear the inner shoulders of the rear tires first; IS owners across years report replacing rears every 10,000 to 20,000 miles and being told it is the price of the handling. On 19-inch staggered fitments that is a four-figure set. Nobody filed it on the 2021 yet, which at three complaints means little. Run a hand across each rear tread from the outside in and feel for a bald inner edge; look at the date code on the tires and match it to the mileage; ask for the last alignment printout. A car that was curbed hard will show it here before anywhere else.

Repair cost (estimate): $150–$250 for an alignment; $700–$1,600 for a set of rear tires

Source: not yet checked against public records.

Walk-Away Red Flags

✗Fresh oil weeping from the cartridge filter housing cap under the engine
✗Rear tires worn smooth on the inside shoulder while the outer edge looks new
✗Coolant reservoir below the line on a turbo IS 300
✗Oil-change stickers more than 10,000 miles apart, or from a shop the seller cannot name
✗A check-engine light, or a scan showing readiness monitors recently cleared

Good Signs

✓Lexus dealer service history from new with synthetic oil at 10,000 miles or less
✓Rear tires wearing evenly across the tread, with the alignment printout to match
✓Coolant full and pink, with a receipt for the last change
✓A steady idle from a cold start you heard with the hood up
✓Original wheels with the factory tire size and matching date codes on all four