2021 Lexus Is 350
Vehicle Specs & Maintenance Data
The 2021 Lexus Is 350 maintenance specs on this page cover the key fluids, torque values, and wear items you need for routine service. Use these numbers as a quick reference when performing oil changes, tire rotations, brake jobs, and other scheduled maintenance on your Lexus Is 350.
For oil changes, the 2021 Lexus Is 350 takes 0W-20 Full Synthetic motor oil with a capacity of 6.2 quarts. Brake fluid type is DOT 3, the recommended coolant is Pink Long Life Coolant (OAT), and transmission fluid is ATF WS. Always use the manufacturer-recommended fluids to maintain warranty coverage and engine longevity.
When mounting wheels on the Lexus Is 350, torque the lug nuts to 103 ft-lbs using a calibrated torque wrench. Over- or under-torquing can lead to warped brake rotors or loose wheels. Re-torque after 50 to 100 miles on newly installed wheels.
Owners of the 2021 Lexus Is 350 have reported 5 common issues including "Dashboard Cracking and Surface Degradation", "Navigation System Slow Response and Outdated Maps" and "Direct Injection Fuel Injector Carbon Deposits (2GR-FSE)". Scroll down to the Diagnostics tab for detailed descriptions, solutions, and estimated repair costs.
Specifications on this page are compiled from multiple publicly available sources including manufacturer documentation, NHTSA data, and automotive databases. Always cross-reference with your owner's manual or official factory documentation before purchasing parts or performing any service.
The 2021 Lexus Is 350 uses 0W-20 Full Synthetic motor oil (6.2 qt capacity), requires lug nuts torqued to 103 ft-lbs, takes DOT 3 brake fluid.
Manufacturer-recommended maintenance schedule for the 2021 Lexus Is 350. Always verify intervals against your owner's manual.
Enter a diagnostic trouble code to see causes, symptoms, and fixes for the 2021 Lexus Is 350.
Common problems reported by 2021 Lexus Is 350 owners, with recommended fixes and estimated repair costs.
Dashboard Cracking and Surface Degradation
The 2014-2020 Lexus IS is affected by dashboard cracking, where the soft-touch dashboard surface develops visible cracks, typically starting near the defroster vents and spreading across the upper dashboard. The cracking is accelerated by UV exposure and heat. Lexus extended coverage for this issue on earlier models, and the 2017 MY has documented cases as well.
Contact Lexus Customer Satisfaction at 1-800-255-3987 to request goodwill dashboard replacement coverage. Lexus has offered dashboard replacement under a Customer Support Program for affected IS models. If not covered, the entire dashboard pad must be replaced, requiring extensive interior disassembly. A dashboard cover can conceal cosmetic cracks.
Est. Cost: $0 under Lexus goodwill/CSP; $1,500 - $3,500 if self-payNavigation System Slow Response and Outdated Maps
The 2017 IS 350's Lexus Enform navigation system uses a trackpad-controlled interface with slow map rendering and laggy menu response. The navigation database requires periodic paid updates and lacks real-time traffic rerouting capability. The system does not support Apple CarPlay or Android Auto on the 2017 model year.
Aftermarket CarPlay/Android Auto retrofit kits are available from BeatSonic and GROM Audio that integrate with the factory display. Navigation map updates are available from the Lexus website. Using a smartphone mount with Google Maps or Waze provides a superior real-time navigation experience at minimal cost.
Est. Cost: $300 - $800 for CarPlay retrofit; $100 - $200 for map updateDirect Injection Fuel Injector Carbon Deposits (2GR-FSE)
The 3.5L 2GR-FSE direct-injection V6 engine can develop carbon deposits on the fuel injector tips and intake valves, causing rough idle, misfires, and hesitation during acceleration. The check engine light may illuminate with misfire codes P0300-P0306. Direct injection engines are inherently susceptible to intake valve carbon buildup because fuel does not wash the valves.
Perform an intake valve cleaning using walnut shell blasting or chemical soak every 60,000-80,000 miles. Fuel injectors can be ultrasonically cleaned or replaced if flow testing shows degradation. Using a top-tier gasoline with enhanced detergent additives can slow the rate of deposit formation.
Est. Cost: $500 - $900 for walnut blast; $200 - $400 per injector for replacementRear Differential Clunk (RWD Models)
IS 350 RWD models can develop a clunk from the rear differential during transitions between acceleration and coasting. The noise is caused by worn differential mounting bushings and backlash in the ring and pinion gear. The clunk is most noticeable in stop-and-go traffic and during parking lot maneuvering.
Inspect and replace the rear differential mounting bushings. Check the differential fluid level and condition, and change it with the specified 75W-90 gear oil. If the gear backlash is excessive, a differential overhaul may be needed. Polyurethane differential bushings offer improved durability over OEM rubber units.
Est. Cost: $300 - $700 for bushing replacement; $1,500 - $3,000 for differential overhaulLED Headlight and DRL Condensation
The LED headlight assemblies on the 2017 IS 350 can develop internal condensation and moisture buildup, reducing light output and causing a foggy appearance. The moisture typically appears after rain, car washes, or temperature changes. The headlight housing seal and breather valves are the common failure points.
Have the dealer inspect the headlight housing seals and breather vents for blockage. Minor condensation that clears within 30 minutes of operation is considered normal by Lexus. Persistent moisture accumulation requires resealing or replacement of the headlight assembly. Warranty coverage may apply if within the bumper-to-bumper period.
Est. Cost: $0 under warranty; $100 - $300 for resealing; $1,000 - $2,500 per headlight if replacement needed