This page lists 11 automatic transmission parts for the 2026 Lexus IS350, across 1 part type, covering the 3.5L V6 engine. Every part shows its brand, manufacturer part number and fitment notes.
On the 2026 Lexus IS350, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts. Every listed part is a Transmission Fluid.
Every part on this page is matched to the 3.5L V6 — the only engine offered in the 2026 Lexus IS350.
The most listed brands for 2026 Lexus IS350 automatic transmission parts are VALVOLINE (5 parts), LIQUI MOLY (3 parts) and IDEMITSU (2 parts), plus 1 more brand. Quality grades include Multi-Vehicle and World Standard.
3 parts on this 2026 Lexus IS350 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including ACDELCO 109243 (Transmission Fluid) and VALVOLINE VV3246 (Transmission Fluid). Click any part number to see every vehicle that part fits.
Transmission Fluid
Dexron
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | 109243 | 🇺🇸 US | Container Type: Plastic Container | View on Amazon |
Multi-Vehicle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | VV3246 | 🇺🇸 US 🇨🇦 CA | Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Quart | View on Amazon |
| VALVOLINE Popular | 773775 | 🇺🇸 US 🇨🇦 CA | Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Gallon | View on Amazon |
| LIQUI MOLY | 20032 | 🇺🇸 US 🇨🇦 CA | Top Tec ATF 18001 Liter | View on Amazon |
| LIQUI MOLY | 22036 | 🇺🇸 US 🇨🇦 CA | Top Tec ATF 18005 Liter | View on Amazon |
| LIQUI MOLY | 20034 | 🇺🇸 US 🇨🇦 CA | Top TEC ATF 180020 Liter | View on Amazon |
| VALVOLINE | 822389 | 🇺🇸 US 🇨🇦 CA | Import Multi-Vehicle ATF1 Quart | View on Amazon |
| VALVOLINE | 881051 | 🇺🇸 US 🇨🇦 CA | Maxlife Multi-Vehicle Full Synthetic ATF5 Gallon Bay Box | View on Amazon |
World Standard (WS)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| IDEMITSU | 30040096750 | 🇺🇸 US | ATF Type TLS-LV1 Quart | View on Amazon |
| IDEMITSU | 30040096953 | 🇺🇸 US | ATF Type TLS-LV5 Quart | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | 899179 | 🇺🇸 US 🇨🇦 CA | Extended Protection Full Synthetic ATF1 Quart | View on Amazon |
This table covers the automatic-transmission fluids specified for this gearbox. Typical signs include harsh or delayed shifts, fluid that smells burnt, or a shudder at light throttle. Use exactly the specification in the notes. Automatic transmissions are unforgiving of the wrong fluid.
11 Transmission Fluid parts for the 2026 Lexus IS350 come from 4 brands — VALVOLINE, LIQUI MOLY, IDEMITSU and 1 other brand. The "Popular" part is ACDELCO 109243.
The Dexron section lists 1 option from ACDELCO — grouped under the catalog's "Dexron" designation — the notes column spells out what sets them apart. ACDELCO 109243 is listed in this group.
The Multi-Vehicle section lists 7 options from VALVOLINE and LIQUI MOLY — grouped under the catalog's "Multi-Vehicle" designation — the notes column spells out what sets them apart. VALVOLINE VV3246 is listed in this group.
The World Standard (WS) section lists 2 options from IDEMITSU — grouped under the catalog's "World Standard (WS)" designation — the notes column spells out what sets them apart. IDEMITSU 30040096750 is listed in this group.
1 further part sits outside the graded sections, with the same engine-level match.
Buying Automatic Transmission Parts for a 2026 Lexus IS350
On this vehicle, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.
- 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 filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Transmission Fluid .
Frequently Asked Questions
How many automatic transmission parts fit the 2026 Lexus IS350?
Our catalog currently lists 11 automatic transmission parts for the 2026 Lexus IS350 across 1 subcategory and 4 brands, covering the 3.5L V6 engine. Each part is matched to the engine(s) it fits.
What are the signs of automatic transmission problems on a 2026 Lexus IS350?
Common symptoms include delayed or harsh engagement, slipping under load, fluid that smells burnt, or shuddering at light throttle around 40 mph. 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 filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
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 2026 Lexus IS350 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 2026 Lexus IS350?
Every part on this page is matched to the 3.5L V6 engine. Then use exactly the fluid specification in the notes — automatic transmissions are the least forgiving component on the vehicle about fluid choice. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2026 Lexus IS350
Automatic Transmission Parts for Other Lexus IS350 Years
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