Parts for your 2003 Toyota Caldina-Transmission filter

2003 Toyota Caldina transmission filter: what it does, where it is, and when to service it

Based on Toyota’s own technical documentation and parts listings, the 2003 Toyota Caldina does use a transmission filter—more precisely, an internal automatic transmission oil strainer. Toyota’s Electronic Parts Catalog for the 2002–2007 Caldina (AZT241/246 and ST246) lists PNC 35330 “Strainer, Oil (AT)” for the applicable Aisin automatic gearboxes. The Toyota Repair Manual procedures for the U241E/A241E transmissions also detail removing the transmission pan and replacing the oil strainer and pan gasket during service. Aisin service literature further describes this strainer as a metal‑mesh type designed to protect the valve body and solenoids. So, while there’s no external spin‑on filter, there is a serviceable internal strainer.

On a 2003 Caldina, that strainer’s job is simple but vital: it catches larger particles and clutch material before they circulate through delicate hydraulic passages. Clean fluid and a clear strainer help keep shifts crisp, prevent flare, and reduce wear on the torque converter, pump, and solenoids.

When it comes to maintenance, Toyota generally treats the strainer as a “while you’re in there” item rather than a strict interval service. In practice, it’s smart to consider a pan drop, strainer replacement, and pan gasket whenever the transmission is due for deeper service or showing symptoms like delayed engagement, harsh or hunting shifts, or a contaminated fluid. Many workshops in Aus and NZ recommend doing this around 100,000–150,000 km if the car’s a keeper, and sooner if the fluid is dark or smells burnt.

Best practice for a 2003 Caldina is a drain‑and‑fill or pan service rather than a high‑pressure flush. Drop the pan, clean the magnets, replace the strainer and gasket, and refill with the correct ATF. Most 2003 builds specify Toyota ATF Type T‑IV, some late builds and certain variants may use Toyota WS—always confirm via the under‑bonnet label or the exact transmission code. After refilling, a short road test and fluid level check at the specified temperature will keep the gearbox happy. Do that, and the Caldina’s auto should shift smoothly for years without fuss.

• Watch for symptoms: slow engagement into Drive/Reverse, shift flare, shudder, or metallic debris in the pan.
• Use the correct ATF (typically Toyota Type T‑IV for 2003, verify if WS is specified for your exact trans).
• Avoid power flushing, opt for a pan service with strainer and gasket replacement.

Popular questions

Does a 2003 Toyota Caldina have a transmission filter?
Yes. It uses an internal oil strainer inside the transmission pan. It’s not a spin‑on filter, but it’s replaceable whenever the pan is removed. Toyota’s EPC lists the strainer for AZT241/246 and ST246 models, and the factory repair manual shows the replacement procedure.

How often should the transmission strainer be replaced on a 2003 Caldina?
There’s no hard interval. Many techs recommend replacing it during a pan service around 100,000–150,000 km, or any time the pan is off for other work. If the fluid is dark, burnt, or you’ve got shift issues, bring the service forward.

What transmission fluid does the 2003 Caldina use?
Most 2003 Caldinas specify Toyota ATF Type T‑IV. Some variants may specify Toyota WS. Check the trans code and the under‑bonnet label to be sure, and always refill to the correct temperature‑based level.