2018 Lexus IS Problems: 3 Known Issues
2018 model year · 8,900+ owner reports · Updated September 2026
According to Au7o's analysis of 8,900+ owner reports, the 2018 Lexus IS has 3 documented known issues, with 1 rated critical. The most serious is Fuel Pump Impeller Failure (Recall). The most commonly reported issue is Fuel Pump Impeller Failure (Recall) with 5,000 owner reports. Across all issues with published estimates, repair costs range from $400 to $800. DIY maintenance guides at au7o.io.
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All 3 Known Issues
NHTSA Recalls1 recall
FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2015-2022 Lexus RC, 2016-2020 GS, and 2022 IS vehicles. The low-pressure fuel pump inside the fuel tank may fail.
Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.
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Frequently Asked Questions
What are the most common Lexus IS problems?
According to Au7o's analysis of 8,900+ owner reports, the 2018 Lexus IS has 3 documented issues. The most frequently reported are: Fuel Pump Impeller Failure (Recall), 8-Speed Automatic Harsh Shifting, Carbon Buildup on Intake Valves (2.0T). Of these, 1 is rated critical and should be addressed promptly.
Is the Lexus IS reliable?
The 2018 Lexus IS has 3 known issues documented across 8,900+ owner reports. 1 issue is rated critical: Fuel Pump Impeller Failure (Recall). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Lexus IS problems?
Repair costs for known Lexus IS issues range from $400 to $800, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2018-2020 Lexus IS Fuel Pump Impeller Failure (Recall)?
The low-pressure fuel pump impeller can deform due to excessive fuel absorption, causing the fuel pump to become inoperative. This results in engine stalling while driving or inability to start, creating a serious safety hazard. Toyota/Lexus issued a massive recall (20V-863) affe… Severity: high.
What is the 2014-2020 Lexus IS 8-Speed Automatic Harsh Shifting?
The Aisin 8-speed automatic transmission in the third-generation IS exhibits harsh or jerky shifts, particularly during low-speed 1-2 and 2-3 upshifts and when downshifting for deceleration. The transmission control module programming prioritizes fuel economy over smoothness, lea… Severity: medium.
What is the 2016-2022 Lexus IS Carbon Buildup on Intake Valves (2.0T)?
The direct-injected 2.0L turbo four-cylinder in the IS200t/IS300 accumulates heavy carbon deposits on the intake valves since fuel is not sprayed over the valves to clean them. This leads to rough idle, hesitation under acceleration, and reduced power output typically between 40,… Repairs typically run $400-$800. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.