Free used car buyer guide / XE30 pre-2021 / 2014-2020
Lexus IS common problems and best years
By BYBA Research - how we score cars
Updated 2026-06-12
BYBA Buy Score
6.4/10
7 serious faults, 1 minor fault documented for this generation, weighted by severity and repair cost. Biggest factor: denso low-pressure fuel pump recall / stalling. Score methodology.
The 2014-2020 Lexus IS is a strong used sport sedan if you pick the right engine and do not ignore tyres, brakes and recall history. The safest mainstream buys are clean IS 350 V6 cars and well-serviced IS 300/200t turbo cars with no boost/cooling issues. Inspect 2.5 V6 carbon/oil leaks on early IS 250, 2.0 turbo coolant/oil/boost behaviour, 8-speed/6-speed automatic shifts, AWD tyre matching, brake/tyre wear, infotainment/display faults, sunroof/water leaks and fuel-pump/airbag recall completion.
Faults covered
8
Highest risk
Denso low-pressure fuel
Best years
2018-2020
Best buys
- IS 350 with service history, smooth transmission and no accident/modified suspension history.
- 2018-2020 IS 300/350 with clean fuel-pump recall status and matched tyres.
- IS 300h in hybrid markets with scan-proven battery/12V health.
Inspect hard
- 2014-2015 IS 250 for carbon buildup, oil leaks and weak performance.
- 2016-2020 2.0 turbo for coolant leaks, turbo noise and oil-change discipline.
- AWD cars for tyre mismatch and transfer/front diff noise.
Avoid
- Modified/tuned turbo cars, AWD cars on mismatched tyres, SRS/recall uncertainty, or water-damaged interiors.
Next checks
Before you contact the seller
Check the car's history first. Then bring the right tools if it still looks worth viewing.
Primary next step
Check history, title, and recall status
The faults above matter more if the car also has accident history, finance flags, missing service records, or open safety recalls.
Viewing kit
Bring the right tools
Four cheap tools catch most of the faults on this page at a Lexus IS viewing.
Printable workflow
Take the inspection pack
The PDF is the ordered checklist for the viewing: documents, walk-around, test drive, and scan.
Open PDF optionSome links here are partner links. If you buy through one, BYBA earns a commission. The price you pay does not change. How we make money.
Engines and trims
Which Lexus IS should you buy?
On most used cars, the engine and trim choice changes the risk more than the mileage does. Narrow this down before you start viewing cars.
4GR-FSE 2.5 V6 IS 250
2014-2015/market dependent
BUY ONLY IF CLEAN AND CHEAP
Reliable base engine but direct-injection carbon and modest performance make condition/price important.
8AR-FTS 2.0 turbo IS 200t / IS 300 RWD
2016-2020
GOOD WITH TURBO/COOLING CHECK
Better torque, but more heat and turbo hardware than the older V6.
2GR-FSE/2GR-FKS 3.5 V6 IS 350 / IS 300 AWD variants
2014-2020
BEST ENTHUSIAST BUY
Strong durable engine; inspect oil leaks, cooling and drivetrain fluids.
2AR-FSE 2.5 hybrid IS 300h in non-US markets
2014-2020
GOOD IF HYBRID SCAN CLEAN
Efficient and durable, but battery/12V/brake corrosion checks are mandatory.
Year notes
Year-by-year buyer advice
Use this to narrow the search before you spend time travelling to view a car.
2014
XE30 launches in US with IS 250/350; hybrid in other markets.
Buyer: Inspect early infotainment, tyres and carbon/oil-leak signs.
Owner: Keep records; buyers compare IS 250 against stronger IS 350.
2015
Last early IS 250 years in some markets.
Buyer: Buy only if price reflects weaker 2.5.
Owner: Do intake/brake/tyre maintenance before resale.
2016
IS 200t turbo appears in many markets.
Buyer: Turbo cooling and oil history matter.
Owner: Short oil intervals protect turbo.
2017
Facelift and naming changes; IS 300 appears in some markets.
Buyer: Good target if transmission and recalls are clean.
Owner: Keep fuel-pump/airbag paperwork.
2018
Mature facelift production.
Buyer: Strong used year for IS 350/300.
Owner: Watch tyre and brake wear.
2019
Equipment packaging updates.
Buyer: Condition and accident history decide.
Owner: Preserve service records.
2020
Final pre-refresh year before 2021 styling/chassis update.
Buyer: Best warranty position in this guide.
Owner: Resolve recalls before selling.
Common problems
Faults to check before buying
What fails, what it looks like, what it costs, and the quick checks you can do at the viewing - ranked by how badly each one can hurt you.
Fault 1
Denso low-pressure fuel pump recall / stalling
Affects
Many 2018-2020 Toyota/Lexus vehicles; verify IS by VIN.
Symptoms
Long crank, stall, no-start, lean/misfire codes, recall not done.
Typical repair cost
USD 0 recall; USD 600-1,200 outside campaign.
Codes / scan clues
P0087, lean/misfire codes.
Root cause: Fuel pump impeller can deform and stop fuel delivery.
Quick check
- Run VIN through Lexus/Toyota and NHTSA.
- Ask for recall completion invoice.
- Hot restart and load-test for stumble.
Fault 2
IS 250 4GR-FSE intake carbon buildup and weak running
Affects
2014-2015 IS 250 direct-injection V6, mileage dependent.
Symptoms
Rough idle, hesitation, misfire, poor economy, weak acceleration.
Typical repair cost
USD 500-1,200 walnut blast/intake clean; USD 1,500+ if injectors/coils added.
Codes / scan clues
P0300-P0306, fuel trim codes.
Root cause: Direct-injection intake valve deposits reduce airflow.
Quick check
- Cold start for rough idle and misfire.
- Road test uphill for hesitation.
- Scan misfire counters/fuel trims.
- Ask if intake cleaning has been done.
Fault 3
8AR-FTS turbo coolant/oil leak or boost fault
Affects
2016-2020 IS 200t/IS 300 RWD turbo.
Symptoms
Turbo whine, coolant smell, oil leak, limp mode, low boost.
Typical repair cost
USD 500-1,500 hoses/leaks; USD 2,000-5,000 turbo-related repair.
Codes / scan clues
P0299, boost control, coolant temp, misfire codes.
Root cause: Turbo heat, oil/coolant line leaks, actuator or boost-control issue.
Quick check
- Inspect turbo area for oil/coolant residue.
- Safe full-boost road test after warm-up.
- Scan for pending boost/misfire codes.
- Avoid tuned cars without logs and maintenance.
Fault 4
8-speed/6-speed automatic harsh shifts or delayed engagement
Affects
RWD 8-speed and AWD 6-speed cars.
Symptoms
Harsh 1-2/2-3, delayed Reverse, flare, shudder, old fluid.
Typical repair cost
USD 250-700 service/adaptation; USD 2,500-6,000 repair/replacement.
Codes / scan clues
Ratio, solenoid, pressure codes.
Root cause: Old fluid, adaptation issues, internal clutch/valve-body wear.
Quick check
- Test cold and hot engagement.
- Drive stop-start and highway acceleration.
- Scan TCM history.
- Check fluid service despite lifetime-fluid claims.
Fault 5
AWD tyre mismatch and transfer/front differential strain
Affects
IS 250/300/350 AWD.
Symptoms
Binding in tight turns, driveline hum, uneven tyres, AWD warning.
Typical repair cost
USD 700-1,400 matched tyres; USD 1,500-4,000 diff/transfer repair.
Codes / scan clues
ABS/wheel speed/AWD codes possible.
Root cause: Different rolling circumference stresses AWD driveline.
Quick check
- Confirm four matching tyres with similar tread depth.
- Drive tight circles and listen for bind.
- Inspect diff/transfer leaks.
- Scan AWD/ABS modules.
Fault 6
Brake, tyre and suspension wear from sport-sedan use
Affects
F Sport and modified cars especially.
Symptoms
Inner tyre wear, brake judder, clunks, lowered suspension, bent wheels.
Typical repair cost
USD 600-1,500 tyres/brakes; USD 1,000-3,000 arms/struts/wheels.
Codes / scan clues
ABS/wheel-speed if damaged.
Root cause: Aggressive alignment, heavy wheels, potholes and sporty driving.
Quick check
- Inspect inner tyre shoulders.
- Brake from highway speed for judder.
- Check suspension for aftermarket parts.
- Verify alignment printout.
Fault 7
Sunroof, trunk and cabin water leaks causing module faults
Affects
2014-2020, especially sunroof cars and accident repairs.
Symptoms
Damp carpets/trunk, musty smell, amplifier/camera faults, SRS/body codes.
Typical repair cost
USD 150-600 drain/seal repair; USD 800-2,500 modules/interior.
Codes / scan clues
Body, amplifier, parking sensor, SRS codes.
Root cause: Blocked drains, lamp/trunk seals or poor body repair.
Quick check
- Lift trunk floor and inspect spare well.
- Check sunroof drains/headliner after rain.
- Test audio, camera and sensors.
- Scan body/SRS modules if damp.
Fault 8
Infotainment display, amplifier and backup camera faults
Affects
2014-2020.
Symptoms
Dead/sticky screen, no audio, camera black screen, controller faults.
Typical repair cost
USD 200-600 repair service; USD 900-2,500 head unit/amplifier/camera.
Codes / scan clues
AVC-LAN/head unit/amplifier communication codes.
Root cause: Heat-aged display/head unit, water intrusion, amplifier failure or wiring fault.
Quick check
- Test screen, controller, Bluetooth, audio and camera.
- Check for water in trunk where amplifier/modules may sit.
- Confirm all speakers work at low and high volume.
- Budget repair if seller says it only needs a reset.
Inspection pack
Printable checklist for the viewing
The free page helps you decide whether the car is worth seeing. The paid guide is the ordered, printable checklist you use at the car.
- VIN recall check for Lexus IS 2014-2020.
- Service invoices matching the engine/drivetrain and mileage, not only stamped history.
- Inspect tyres, leaks, accident repair and water entry before the test drive.
- Look specifically for evidence related to Denso low-pressure fuel pump recall / stalling.
- Check every warning light, infotainment function, climate mode, camera/sensor warning and battery condition before moving.
- Cold start, full warm-up, low-speed manoeuvres and motorway-speed pull for Lexus IS.
- Recheck for smells, warning lights, harsh shifts, vibration or coolant/oil leaks after the drive.
- Scan engine, transmission, ABS/body and driver-assist modules where fitted.
- Treat cleared codes or incomplete readiness monitors as negotiation or walk-away evidence.
Bottom line
Buy: IS 350 with service history, smooth transmission and no accident/modified suspension history. 2018-2020 IS 300/350 with clean fuel-pump recall status and matched tyres.
Avoid: Modified/tuned turbo cars, AWD cars on mismatched tyres, SRS/recall uncertainty, or water-damaged interiors.
Quick answers
Lexus IS buyer questions
The short versions of what this page answers in full.
What are the most common Lexus IS 2014-2020 problems?
The highest-impact documented faults are: Denso low-pressure fuel pump recall / stalling; IS 250 4GR-FSE intake carbon buildup and weak running; 8AR-FTS turbo coolant/oil leak or boost fault. This guide covers 8 faults in total, each with symptoms, typical repair costs, and checks you can do at a viewing.
Which Lexus IS years are the best to buy?
2018-2020 stand out in this generation. IS 350 with service history, smooth transmission and no accident/modified suspension history. 2018-2020 IS 300/350 with clean fuel-pump recall status and matched tyres.
Which Lexus IS should I avoid?
Modified/tuned turbo cars, AWD cars on mismatched tyres, SRS/recall uncertainty, or water-damaged interiors.
Is the Lexus IS 2014-2020 a reliable used buy?
BYBA scores it 6.4/10 (buy with checks). 7 serious faults, 1 minor fault documented for this generation, weighted by severity and repair cost. Biggest factor: denso low-pressure fuel pump recall / stalling.
Get updates when this guide changes
Recalls get added, repair costs shift, and new fault patterns show up in the data. Leave an email and we'll tell you when the Lexus IS guide gets a meaningful revision. Nothing else, no selling your address.
Research basis
- lexus.com: recall
- nhtsa.gov: recalls
- static.nhtsa.gov: MC-10235218-9999.pdf
- clublexus.com: is-3rd-gen-2014-present-249
- carcomplaints.com: IS_250
- nhtsa.gov: IS
- nhtsa.gov: IS%2520200T
- lexus.com: warranty-manuals
- nhtsa.gov: IS
- nhtsa.gov: IS
- repairpal.com: problems
- iihs.org: 2020
- NHTSA Lexus IS complaints
- Lexus connected/owner resources
- NHTSA 2020 Lexus IS complaints