2015 model year · 2,500+ owner reports · Updated June 2026
According to Au7o's analysis of 2,500+ owner reports, the 2015 Lexus GS has 2 documented known issues. No issues are rated critical, indicating generally reliable ownership. The most commonly reported issue is Water Pump Premature Failure with 1,400 owner reports. Across all issues, repair costs range from $500 to $2,000. DIY maintenance guides at au7o.io.
On the 2013-2020 Lexus GS, the water pump on the GS models fails prematurely, typically between 60,000-100,000 miles. Coolant leaks from the weep hole as the internal seal deteriorates, and the pump bearing develops play causing a whining noise. If not addressed, overheating and potential engine damage can occur.
Replace the water pump assembly and thermostat together as a preventive measure. Use OEM or high-quality aftermarket parts (Aisin brand is the OEM supplier). Replace the serpentine belt and tensioner at the same time if they show wear.
Parts and tips from 1,400+ owners who fixed this issue
On the 2006-2015 Lexus GS, the power steering rack develops internal seal leaks that cause power steering fluid loss. The leak typically appears at the inner tie rod boots where fluid seeps past the rack seals. Low fluid levels lead to increased steering effort and pump whining noise, and eventually the rack must be replaced.
Replace the power steering rack assembly. Remanufactured racks are available from Maval and Cardone at significant savings over new OEM. Perform a complete power steering fluid flush after installation. Inspect tie rods and replace if worn.
Parts and tips from 1,100+ owners who fixed this issue
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.
Don't see your problem? Describe your symptoms to get a diagnosis, or get a full repair guide.
According to Au7o's analysis of 2,500+ owner reports, the 2015-2015 Lexus GS has 2 documented issues. The most frequently reported are: Water Pump Premature Failure, Power Steering Rack Seal Leak. None are rated critical, but regular maintenance is recommended.
The 2015-2015 Lexus GS has 2 known issues documented across 2,500+ owner reports. No issues are rated critical, suggesting generally good reliability. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Lexus GS issues range from $500 to $2,000, 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.
The water pump on the GS models fails prematurely, typically between 60,000-100,000 miles. Coolant leaks from the weep hole as the internal seal deteriorates, and the pump bearing develops play causing a whining noise. If not addressed, overheating and potential engine damage can… Repairs typically run $500-$1,200. Severity: medium.
The power steering rack develops internal seal leaks that cause power steering fluid loss. The leak typically appears at the inner tie rod boots where fluid seeps past the rack seals. Low fluid levels lead to increased steering effort and pump whining noise, and eventually the ra… Repairs typically run $800-$2,000. 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.
