Used Lexus IS 3rd Gen (2014-2020): Buyer's Guide

The "IS 300" badge on a 2016 and a 2018 Lexus IS identifies two completely different engines with different failure patterns and different maintenance costs. The 2016 IS 300 has a detuned 3.5L V6 with AWD. The 2018 IS 300 has a 2.0L turbocharged four-cylinder with a documented surging issue, oil dilution concerns, and a technical service bulletin that dealers may or may not have performed on the car you're looking at. Both say IS 300 on the trunk lid.

That naming confusion runs through the entire XE30 generation. The IS 250 that launched this platform in 2014 carries a direct-injection-only engine that deposits carbon on intake valves at a predictable rate. The IS 350, sharing the same platform and the same basic shape, uses a dual-injection system that largely avoids that problem. Same exterior. Same dealership. Meaningfully different ownership story.

This guide covers the XE30-platform Lexus IS from 2014 through 2020. By the end, you will know which badge maps to which engine, what each engine tends to fail, and which year-and-powertrain combination is worth your money.

This Generation at a Glance

The XE30 IS launched for 2014, riding an updated rear-wheel-drive platform that replaced the XE20 (2006-2013). The redesign brought sharper exterior styling, a lower center of gravity, an overhauled powertrain lineup, and a revised suspension tuned toward sportier handling than the outgoing generation. The 2021 model received a substantial facelift with a redesigned front end and updated interior, placing it in a different ownership category.

Within the XE30 generation, two inflection points matter:

2014-2015: IS 250 and IS 350 only in the US market. Convertible models (IS 250C, IS 350C) sold through 2015.

2016: IS 250 discontinued. IS 200t (turbocharged four-cylinder) introduced. IS 300 AWD (3.5L V6 with AWD) added as a separate model.

2017-2020: IS 200t renamed IS 300. Subtle exterior refresh. V6 engines received a small power bump for 2017.

See the full Lexus IS market data for current pricing and inventory across all years.

Powertrain and Trim Breakdown

IS 250 (2014-2015): The Predictable Maintenance Car

The IS 250 uses the 4GR-FSE 2.5L V6. This is a gasoline direct injection (GDI) engine with no port injection component. Every GDI engine without port injection accumulates carbon deposits on the intake valves, because fuel is injected directly into the combustion chamber and never washes over the valves the way port injection does. The 4GR-FSE follows this pattern, and by 60,000 to 80,000 miles most IS 250 owners are dealing with the symptoms: rough idle, stumbling under light throttle, hesitation on cold starts.

The fix is walnut blasting. Crushed walnut shells are blasted at the intake valves to remove the deposits. Cost ranges from $400 to $1,000 depending on the shop. Forum threads on ClubLexus.com and the Lexus IS Forum document this issue extensively across the full IS 250 production run, including the 2014-2015 XE30 models. It is not a catastrophic failure, but it is a predictable maintenance cost that should factor into any offer you make.

The IS 250 shares a rear brake caliper seizing problem common to this entire IS generation. Caliper slide pins corrode when the car sits for extended periods or when the parking brake goes unused for months at a time. A seized caliper causes uneven brake wear, pulling, and elevated rotor temperatures. Rebuilding or replacing a seized caliper runs $200 to $400 per side at an independent shop.

Two more issues specific to 2014 models: the navigation system on early XE30 builds had repeated reports of the screen rebooting mid-drive and failing to boot on cold mornings. Lexus addressed many of these under warranty, but used cars may still have the affected units. Also, the 2014 was the first year of the platform, which means the typical first-year quirks: minor electronics gremlins, fit-and-finish inconsistencies on early builds.

The IS 250 is the cheapest entry into this generation. It is not the best value.

IS 200t (2016) and IS 300 RWD (2017-2020): The Turbo Four-Cylinder

The 2016 IS 200t introduced the 8AR-FTS turbocharged 2.0L four-cylinder to the IS lineup. For 2017, Lexus renamed the same model the IS 300. The engine is identical across both badges. This is the most important thing to understand about this powertrain.

The 8AR-FTS produces 241 horsepower and 258 lb-ft of torque, returning 26 mpg combined in RWD form. That is the best fuel economy in the IS lineup by a meaningful margin. It is not the most durable engine in this generation.

VRV surging (TSB L-SB-0153-17). Certain 8AR-FTS engines develop a rocking or surging sensation between 30 and 70 mph under steady throttle. A buzzing noise from the engine bay often accompanies it. The cause is a failing Vacuum Regulating Valve (VRV). Lexus issued Technical Service Bulletin L-SB-0153-17 covering 2015-2019 IS 200t and IS 300 models. The fix requires replacing the VRV (genuine Lexus part: approximately $137) and the associated vacuum hose. Total dealer repair runs approximately $300 to $400. This TSB is not a recall, meaning dealers would only perform it if a customer complained. Many used cars will have this unresolved.

Oil dilution. Gasoline can enter the engine oil on turbocharged 8AR-FTS applications, particularly on frequent short trips where the engine never fully reaches operating temperature. Diluted oil loses viscosity and its protective properties. Owners who stretch oil changes beyond 5,000 miles compound this problem. The fix is diligent oil changes at or before 5,000 miles and a full synthetic rated for this engine.

Auxiliary water pump. The turbocharger relies on an electric auxiliary water pump to circulate coolant after engine shutdown and prevent heat soak. This pump fails with some frequency between 40,000 and 60,000 miles on high-mileage examples. Replacement costs $300 to $500 including labor. Multiple owners on ClubLexus and the Lexus IS Forum report replacing this pump as a routine high-mileage item.

On a test drive: drive at a steady 45 to 65 mph on a highway with consistent throttle. Any rocking, surging, or hunting from the engine means the VRV issue is present and unresolved. Ask the seller specifically whether TSB L-SB-0153-17 was performed. Pull the oil dipstick and smell it. A gasoline odor in engine oil is a hard no.

IS 300 AWD (2016-2020): The One Everyone Misunderstands

Most buyers comparing IS 300 to IS 350 overlook the IS 300 AWD entirely, assuming it's the same turbocharged four-cylinder as the RWD IS 300. It is not.

The IS 300 AWD uses the 3.5L 2GR-FSE V6, detuned to 255-260 horsepower. The same engine family that powers the IS 350, just calibrated differently. The IS 300 AWD paired with a 6AT transmission and all-wheel drive.

The 2GR-FSE uses D4-S dual injection, combining port injection and direct injection. The port injection component washes the intake valves on every combustion cycle, preventing the carbon accumulation that plagues the IS 250. The oil dilution issues of the 8AR-FTS turbo do not apply here either.

The trade-offs are the 6AT (versus the 8AT in the RWD IS 350 and IS 300 turbo) and 50 fewer horsepower than the IS 350. For buyers in states with winter weather, the AWD traction paired with the V6's long-term reliability record makes the IS 300 AWD a frequently underpriced option in the used market. Most buyers skip it because the badge doesn't tell them what's under the hood.

Annual repair costs for the IS 300 AWD are comparable to the IS 350.

IS 350 (2014-2020): The One to Buy

The IS 350 carries the 3.5L 2GR-FSE V6 paired with an 8AT in RWD form. Output runs 306 horsepower in 2014-2016 models and 311 horsepower from 2017 onward following a minor tune revision.

The 2GR-FSE uses D4-S dual injection. Port injection prevents intake valve carbon accumulation. Long-term owners on ClubLexus consistently post about IS 350s reaching 150,000 to 200,000+ miles on regular maintenance with minimal engine-related repairs. The 2GR engine family is shared across a wide range of Toyota and Lexus platforms and has an established long-term reliability record.

Known issues specific to the IS 350:

VVT-i oil line leaks. The variable valve timing system has documented oil line leaks on higher-mileage examples. Repair costs range from $450 to $1,100 depending on which line and local labor rates. A ticking or rattling on cold start that clears within 30 seconds is normal VVT-i behavior. A tick that persists past full operating temperature warrants inspection.

Fuel pump recall (NHTSA 20V-012). Lexus recalled certain 2018-2019 IS 350 models (and 2019 IS 300) for a low-pressure fuel pump that could fail and stall the engine while driving. Lexus's internal campaign was 20LA01. Authorized dealers replaced the pump at no charge. Confirm this recall was completed before purchasing any 2018-2019 IS 350. Run the VIN at /tools/recall-lookup before you make an offer.

Rear caliper seizing. Same issue as the IS 250. More common on cars where the parking brake was never used. A seized rear caliper on an IS 350 looks exactly like a seized caliper on any other car, so get them checked on a lift.

The IS 350 AWD uses a 6AT instead of the 8AT, and some owners notice less crisp downshift response. The AWD drivetrain adds real year-round capability, particularly in northern states.

Trim-Specific Notes

The XE30 IS ran four main trim configurations through its production: base, Premium, F Sport, and Ultra Luxury on select AWD variants.

Base and Premium account for the majority of used inventory. Premium adds a power panoramic moonroof and ventilated front seats. Both use the standard infotainment display, which functions reliably even if it shows its age by current standards. On 2014-2015 base trims, confirm the navigation unit functions correctly.

F Sport is the trim most buyers want. It adds sport-tuned seats with more lateral bolstering, a mesh front grille, aluminum sport pedals, and 18-inch dark-finish wheels. The F Sport package is available on every powertrain, which means an IS 300 F Sport and an IS 350 F Sport are not the same car and should not be priced identically.

Within F Sport, the most important thing to check is whether AVS (Adaptive Variable Suspension) is included. AVS uses electronically controlled dampers that adjust between a comfortable Normal setting and a firmer Sport+ setting. An IS F Sport with AVS rides comfortably in daily use and firms up noticeably when you want engagement. An IS F Sport without AVS runs on performance-tuned fixed-rate dampers. On rough urban roads, that translates to a genuinely harsh daily experience without the dynamic payoff of a full sport suspension. Many owners on ClubLexus specifically note that AVS is worth prioritizing when shopping. Search for IS 350 F Sport with AVS as a specific filter.

Ultra Luxury appeared later in the generation on IS 300 AWD and IS 350 AWD models. It adds a 17-speaker Mark Levinson audio system (consistently rated excellent by owners), triple-beam LED headlights, and a Panoramic View Monitor. If you find an Ultra Luxury at a similar price to a standard AWD, it is worth taking.

One honest caveat across all trims: the XE30 IS has a small rear seat. This is consistent, documented, and not a secret. Rear headroom and legroom are genuinely limited. Adults over six feet tall will be uncomfortable. If you regularly carry passengers in the back, this matters and no trim level fixes it.

Which Model Years to Target

2014 had the most owner-reported issues of any year in this generation: navigation reboots, first-year build inconsistencies, and no turbo or V6 AWD option. The 2014 IS 350 is acceptable if priced to reflect the risk. The 2014 IS 250 is the worst combination of issues available in this generation.

2015 is a marginal improvement over 2014. Still limited to IS 250 and IS 350. The IS 350 from 2015 is a reasonable used purchase at the right price with verified service records.

2016 introduced the IS 200t and IS 300 AWD, diversifying the lineup. The IS 200t debuted with VRV issues that owners started reporting in the first year of ownership. The IS 350 in 2016 is fully sorted. The IS 300 AWD (V6) starts here and is consistently underpriced because shoppers mistake it for the turbo four-cylinder.

2017-2018 is the sweet spot of this generation. The V6 engines received a small power bump. The VRV TSB was well-established by dealers. No major recalls affect these years. A 2018 IS 350 with 80,000 to 100,000 miles on a documented service history is one of the better used luxury sport sedan values available.

2019 carries the fuel pump recall (20V-012) on IS 300 and IS 350 variants. If the recall was completed, it is not a red flag. It's a free repair that was handled. Confirm it via VIN before any offer.

2020 is the most refined expression of the XE30 platform. Lexus had seven years to sort this generation by this point. The 2020 IS 350 commands a premium in the used market. For buyers who want the cleanest version of the generation, that premium is justified.

Pre-Purchase Inspection Checklist

IS 250 Specific

Start the car cold after sitting overnight. Let it idle for two full minutes with the windows down. A rough idle or stumbling hesitation that persists beyond 90 seconds suggests carbon deposits on the intake valves. This is not a reason to walk away automatically, but it should reduce your offer by $500 to $800 to account for the service.

• Ask for receipts for walnut blast intake cleaning. On any IS 250 over 70,000 miles without that receipt, assume the service is needed and price accordingly.
• Apply and release the foot-operated parking brake twice in sequence. Resistance that does not release smoothly, or a groaning release, indicates seized rear caliper slide pins.
• Boot the navigation system at startup. It should complete booting within 30 seconds. A looping boot screen or blank display is an early sign of unit failure.

IS 200t and IS 300 Turbo Specific

Drive at a steady 45 to 65 mph on a highway with consistent throttle input. Any rocking, surging, or hunting sensation means TSB L-SB-0153-17 (VRV) has not been addressed. Ask the seller directly whether this TSB was performed at a Lexus dealership.

• Pull the oil dipstick and smell it before the test drive. A faint gasoline odor in engine oil indicates oil dilution. Do not buy a car with contaminated engine oil.
• Ask for oil change frequency records. More than 5,000-mile intervals on a turbocharged application indicates compounded dilution risk.
• Listen for buzzing from the engine bay at idle with the windows down. That buzzing is the VRV failure signature.
• Ask when the auxiliary water pump was last inspected or replaced on cars over 50,000 miles.

IS 350 Specific

Run the VIN before the test drive. Any 2018-2019 IS 350 requires confirmation that recall 20V-012 was completed. Check at /tools/recall-lookup.

• Cold start the engine and listen for 30 to 60 seconds. A ticking that clears before the car reaches operating temperature is normal VVT-i behavior. One that persists past full warmup means an oil line inspection is needed.
• During the test drive, use paddle shifters (if equipped) to manually cycle through all 8 gears. The 8AT should shift without flare, slipping, or hesitation. Any abnormal shift behavior warrants transmission inspection.
• Have a mechanic check rear brake calipers on a lift. The slide pins should move freely. Corrosion or resistance means caliper service is needed before the car is safe.

All Variants

• Inspect all LED DRL strips in daylight. Individual segments fail and replace as full assemblies. Expect $400 to $800 per assembly to replace. Confirm all strips are fully illuminated before any offer.
• Run a vehicle history report. The IS is heavily concentrated in Florida and other warm-weather states (Florida leads CarScout inventory for this model). Check specifically for flood titles.
• Verify all open recalls are cleared via VIN lookup regardless of model year.

Running Costs

Tires are a real cost on IS 350 RWD. Rear-wheel drive and rear-biased weight distribution wear through rear tires faster than most luxury sport sedan competitors. Expect 30,000 to 40,000 miles on a rear set. Performance 18-inch rubber runs $200 to $350 per tire.

The IS is classified as a luxury vehicle for insurance purposes. Rates run meaningfully higher than mainstream sedans, and the F Sport trim can add a further surcharge on some policies.

FAQ

Is the Lexus IS 3rd gen (2014-2020) reliable? The IS 350 is among the more reliable options in the used luxury sport sedan segment. RepairPal rates the IS 350 at 4.0 out of 5.0 for reliability with an average annual repair cost of $543. The IS 250 adds a predictable walnut-blast cleaning cost at 60k-80k miles. The IS 300 turbo requires more maintenance attention than the IS 350 but is manageable with diligent oil change intervals.

Should I buy an IS 300 or IS 350? The IS 350 is the stronger buy in almost every scenario. The IS 300 turbo (2017-2020) returns better fuel economy (26 mpg combined vs. 22-23 mpg) but carries documented VRV, oil dilution, and auxiliary water pump concerns that the IS 350 does not. The IS 350 is more powerful, more reliable long-term, and often similarly priced in the used market. The IS 300 AWD with the V6 is a legitimate exception if AWD traction is a priority.

How many miles will a Lexus IS 3rd gen last? The IS 350 with documented maintenance reaches 200,000 miles routinely. The 2GR-FSE V6 appears in many Toyota and Lexus applications and has a well-established long-term durability record. The IS 250 can reach similar mileages if the carbon buildup is addressed. The IS 300 turbo has a shorter reliability track record but appears durable with diligent 5,000-mile oil change intervals.

Is the IS 250 worth buying used? Only at a meaningful discount from IS 350 pricing. The IS 250 carbon buildup service costs $400 to $1,000 and is needed on virtually every example over 70,000 miles without a service receipt. When an IS 250 is priced appropriately to account for that, it can be a reasonable buy. At full market price, the IS 350 is the better value in the same dollar range.

Is the IS 350 F Sport worth paying more for? Yes, with one condition: confirm AVS (Adaptive Variable Suspension) is included. An IS 350 F Sport with AVS is a meaningfully more livable daily car than the same trim without it. The electronically controlled dampers soften the suspension in Normal mode and firm it in Sport+. Without AVS, the F Sport runs a stiff fixed-rate performance suspension that owners consistently describe as punishing on rough urban roads. Filter your search specifically for F Sport models with AVS.

Bottom Line

The 2017-2020 IS 350 is the target for most buyers. The D4-S engine avoids the carbon issue that follows every IS 250. The 311hp 2GR-FSE and 8AT make it the most complete version of the XE30 platform. A 2018 IS 350 with 70,000 to 100,000 miles on a documented service history is one of the better used luxury sport sedan values in this price range.

For buyers who need AWD, the IS 300 AWD (V6) is frequently underpriced because shoppers mistake it for the turbo four-cylinder. Look specifically for the AWD badge paired with the 3.5L V6 in the listing details.

Avoid the IS 250 unless the price reflects the walnut-blast work it almost certainly needs. Approach the IS 200t and IS 300 turbo with the VRV TSB and oil dilution checklist firmly in hand.

Run every VIN through a recall check before any offer. CarScout members can track specific IS year, trim, and powertrain combinations and get notified when prices drop at usecarscout.com.

Data sourced from NHTSA recalls database (campaign 20V012000, Technical Service Bulletin L-SB-0153-17), EPA fuel economy data, and real owner experiences from ClubLexus.com, the Lexus IS Forum (my.is), and the Lexus Owners Club of North America. See the full Lexus IS market data for current pricing and inventory.