The 2025 Lexus IS300 has 16 drivetrain parts with verified fitment on this page — 3 part types and 4 brands, covering the 3.5L V6 engine. Each part includes a manufacturer part number and application notes.
The drivetrain system on the 2025 Lexus IS300 moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. All 16 listed parts are Gear Oil (11 parts), CV Axle (4 parts) and Transfer Case Fluid (1 part).
Every part on this page is matched to the 3.5L V6 — the only engine offered in the 2025 Lexus IS300.
The most listed brands for 2025 Lexus IS300 drivetrain parts are VALVOLINE (10 parts), GSP (2 parts) and TOP NOTCH (2 parts), plus 1 more brand.
3 parts on this 2025 Lexus IS300 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including MOBIL 104361 (Gear Oil) and VALVOLINE VV820 (Gear Oil). Click any part number to see every vehicle that part fits.
CV Axle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GSP | NCV69100 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| GSP | NCV69096 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| TOP NOTCH | TN18021 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| TOP NOTCH | TN18018 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
This table covers the complete CV axle shafts from differential (or hub) to wheel. Typical signs include a click in tight turns, grease flung around the wheel well, or a vibration that builds with speed. A torn boot caught early is a boot kit; caught late it is the whole axle. Torque the axle nut to the method in the notes.
4 CV Axle parts for the 2025 Lexus IS300 come from 2 brands — GSP and TOP NOTCH.
Listed part numbers: GSP NCV69100, GSP NCV69096 and TOP NOTCH TN18021, plus the other parts above.
Gear Oil
SAE 75W-90
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOBIL Popular | 104361 | 🇺🇸 US 🇨🇦 CA | Synthetic Gear Lube Limited Slip 75W-901 Quart | View on Amazon |
| VALVOLINE Popular | VV820 | 🇺🇸 US 🇨🇦 CA | Daily Protection SAE 75W-90 Gear Oil1 Quart | View on Amazon |
| VALVOLINE Popular | VV975 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart | View on Amazon |
| VALVOLINE | 889785 | 🇺🇸 US 🇨🇦 CA | Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill | View on Amazon |
| VALVOLINE | 882505 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon | View on Amazon |
| VALVOLINE | 723856 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon | View on Amazon |
| VALVOLINE | VV822 | 🇺🇸 US 🇨🇦 CA | Daily Protection SAE 75W-90 Gear Oil16 Gallon KEG | View on Amazon |
SAE 80W-90
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | VV831 | 🇺🇸 US 🇨🇦 CA | Daily Protection SAE 80W-90 Gear Oil1 Quart | View on Amazon |
| VALVOLINE | 773732 | 🇺🇸 US 🇨🇦 CA | Daily Protection SAE 80W-90 Gear Oil1 Gallon | View on Amazon |
| VALVOLINE | VV838 | 🇺🇸 US 🇨🇦 CA | Daily Protection SAE 80W-90 Gear Oil5 Gallon | View on Amazon |
| VALVOLINE | VV836 | 🇺🇸 US 🇨🇦 CA | Daily Protection SAE 80W-90 Gear Oil16 Gallon KEG | View on Amazon |
This table covers the gear oils specified for the axle or transfer case. Typical signs include a low-oil lamp, knocking, or oil that has gone thin before the next interval. Match the viscosity and spec in the notes, not just the weight on the bottle.
11 Gear Oil parts for the 2025 Lexus IS300 come from 2 brands — VALVOLINE and MOBIL. The "Popular" part is MOBIL 104361.
The SAE 75W-90 section lists 7 options from VALVOLINE and MOBIL — grouped under the catalog's "SAE 75W-90" designation — the notes column spells out what sets them apart. MOBIL 104361 is listed in this group.
The SAE 80W-90 section lists 4 options from VALVOLINE — grouped under the catalog's "SAE 80W-90" designation — the notes column spells out what sets them apart. VALVOLINE VV831 is listed in this group.
Transfer Case Fluid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOBIL | 126505 | 🇺🇸 US 🇨🇦 CA | Multi-Vehicle ATF | View on Amazon |
This table covers the fluids specified for the transfer case. Typical signs include discolored fluid, a burnt smell, or a level that keeps dropping. Use only the specification in the notes — the tables group grades because they are not interchangeable.
This group shows a single part: MOBIL 126505.
Buying Drivetrain Parts for a 2025 Lexus IS300
On this vehicle, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.
- Confirm you have the 3.5L V6 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Gear Oil and CV Axle .
Frequently Asked Questions
How many drivetrain parts fit the 2025 Lexus IS300?
Our catalog currently lists 16 drivetrain parts for the 2025 Lexus IS300 across 3 subcategories and 4 brands, covering the 3.5L V6 engine. Each part is matched to the engine(s) it fits.
What are the signs of drivetrain problems on a 2025 Lexus IS300?
Common symptoms include clicking in tight turns, a clunk when shifting between drive and reverse, vibration that builds with speed, or gear oil on the inside of a wheel. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2025 Lexus IS300 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2025 Lexus IS300?
Every part on this page is matched to the 3.5L V6 engine. Then a torn CV boot caught early is a cheap boot kit; caught late it is a whole axle — inspect before deciding which to buy. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2025 Lexus IS300
Drivetrain Parts for Other Lexus IS300 Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.