No US model-year tire size or 12V battery group is verified here for Lexus IS. Follow the manufacturer and vehicle-label checks below before choosing a replacement.
What is established here
| Item | Current status |
|---|---|
| Tire specification | Not established for an exact model year, trim and wheel package |
| 12V battery specification | Not established for an exact model year, powertrain and equipment |
What we checked
No exact US model-year tire or 12V battery application survived our source review for Lexus IS. This page explains how to find the answer on the actual vehicle.
Review log: This model had no exact model-year table in the reviewed candidate batch. The linked manufacturer portal is the starting point for a VIN- and year-specific check.
Lexus IS research focus: Check the exact IS trim and both axle positions; performance wheel packages should not be treated as four identical tires.
Find the tire specification
Open Lexus owner resources. Choose the exact Lexus model and year, then use its owner's manual and service resources. Select your actual model year and read its wheels and tires section. Then compare the driver-door placard with the installed front and rear tires. NHTSA tire safety guidance explains why the vehicle placard matters.
- Copy the complete tire notation, including its P, LT or ZR prefix where present, and the wheel diameter.
- Record each axle separately, plus load index, speed symbol, OE marking and vehicle cold pressure.
- Use Goodyear’s model-year finder as a second source only. If its trim or axle options disagree with the placard, stop and use the vehicle maker’s instructions.
Find the 12V battery specification
Use the exact VIN and powertrain with the manufacturer’s parts or service desk. Ask for the current low-voltage replacement part, its technology and any superseded part numbers. The owner manual may describe replacement steps without giving a BCI group.
- Photograph the installed battery label and its location. Note voltage, group or OEM case code, AGM/EFB/flooded technology and CCA if shown.
- Confirm terminals, hold-down, tray, venting and any battery-management registration with current OEM service instructions.
- Use Interstate’s battery finder only to generate a candidate; it cannot override a VIN-specific OEM instruction.
Make a verification worksheet
Write down what you can see on the vehicle before contacting a parts desk. This browser-only form does not send or save your entries. Do not enter a full VIN here.
Use your verified values
Once you have the full tire notation, use the tire placard check. Once you have the battery label and OEM technology requirement, use the battery label check. Both tools screen obvious mismatches and leave final fitment unapproved.
When a portal lacks an older manual, ask a dealer or qualified parts desk for the matching publication using the VIN and model year. Do not substitute a nearby year, trim or powertrain.
Sources and scope
- Lexus — My Lexus Manuals and Resources (checked 2026-11-01)
- NHTSA — VIN Decoder (checked 2026-11-01)
- NHTSA — Tire Safety and Vehicle Placard Guidance (checked 2026-11-01)
- Goodyear — Find Tires by Vehicle (checked 2026-11-01)
- Interstate Batteries — Vehicle Battery Finder (checked 2026-11-01)
Research checked November 2, 2026. Portal and lookup links show where to verify the missing value; they are not evidence for a model-year size or final product fitment.