Parts for your 2007 Toyota Ist-Transmission filter

2007 Toyota ist transmission filter: what it does and when to service it

Based on Toyota technical literature and parts catalogues, a transmission filter is relevant on the 2007 Toyota ist when it’s fitted with an automatic or CVT. Toyota repair manuals for the U340E/U341E 4‑speed automatic list an “A/T oil strainer” inside the pan, and the K110/K111 Super CVT‑i manuals specify a “CVT fluid inlet strainer” (and, on some variants, a small auxiliary cooler filter). The Toyota Electronic Parts Catalogue also shows these components under part groups 35‑ (e.g., 35330‑xxxxx strainer sub‑assy). Manual gearboxes don’t use a replaceable filter.

For most 2007 Toyota ist examples seen in Australia and New Zealand (often JDM imports), the car will be either a 4‑speed auto or a Super CVT‑i. In both cases, there’s an internal filter/strainer that’s there to protect the trans from wear debris and clutch material, keeping fluid flow steady and the hydraulic circuits happy.

What’s the point of the filter? In simple terms, it catches the fine particles that naturally shed from clutches, bands and gears. A clean, freely flowing filter helps stabilise shift quality, reduces pump effort, and supports cooler operating temps. On the CVT, maintaining clean fluid and a clear strainer is especially important for belt and pulley longevity.

When should it be serviced? Toyota’s global guidance often treats the internal strainer as “inspect/replace when the pan is removed”, not a frequent consumable. Real‑world conditions in Aus/NZ—stop‑start traffic, heat, short trips—justify a pragmatic schedule:

• Fluid health check every 40,000–60,000 km (colour, smell, and contamination).
• Pan drop, magnet clean and strainer inspection roughly every 60,000–80,000 km, or if there are shift flare, shudder, delayed engagement or contaminated fluid.
• Use the correct fluid: Toyota WS for the 4‑speed auto, Toyota CVT Fluid TC/FE (as specified on the under‑bonnet label) for the CVT.

Good practice during a pan service includes replacing the pan gasket, cleaning or replacing the strainer (depending on type and condition), wiping down the magnets, and resetting any learned shift adaptives if the scan tool and model support it. Some CVT variants have a small external cooler‑return filter, if fitted, it’s cheap insurance to renew it during fluid service.

If the 2007 ist happens to be a 5‑speed manual, there’s no transmission filter to replace—just stick to the specified manual trans oil and intervals, and check for leaks and correct level during regular servicing.

FAQs

Does a 2007 Toyota ist have a transmission filter?
Yes, if it’s an automatic or CVT. Both the U341E 4‑speed auto and the K110/K111 Super CVT‑i use an internal strainer/filter. Manual models don’t have a serviceable filter.

How often should the transmission filter be serviced on a 2007 ist?
Plan to inspect the strainer when the pan is removed, typically around 60,000–80,000 km in local conditions. Check and refresh the fluid sooner if it’s discoloured, smells burnt, or you notice shift issues.

Which transmission fluid does the 2007 ist use?
4‑speed autos use Toyota ATF WS. CVT models use Toyota CVT Fluid TC or FE as indicated on the under‑bonnet label and in the repair manual. Using the correct fluid is critical to shift quality and longevity.