Parts for your 2009 Mazda 6-Transmission filter

2009 Mazda 6 transmission filter: what it does and when it matters

Based on Mazda’s 2009 Mazda6 (GH) workshop manuals and Aisin technical literature, a transmission filter is relevant to this model when fitted with an automatic. The 2.5L petrol with the 5‑speed automatic (FS5A‑EL) uses a replaceable sump strainer/filter. The 3.7L V6 with the 6‑speed Aisin automatic (AW6A‑EL/TF‑80SC) has an internal filter not intended for routine service. Manual gearboxes don’t have a transmission filter. That means the part exists on the auto cars, but how it’s serviced depends on which transmission is in the vehicle.

What the transmission filter does is simple but vital. It screens out clutch material, fine metal particles and general debris so the fluid can keep flowing at the right pressure to the valve body and solenoids. Clean fluid and a healthy filter help maintain crisp shifts, reduce wear and keep temperatures in check, which is exactly what any Mazda 6 owner wants for city commutes and long Kiwi or Aussie road trips.

For 2.5L autos (FS5A‑EL), the filter is a pan-mounted strainer that can be replaced during a fluid service. A sensible approach for local conditions is a drain-and-refill with Mazda ATF M‑V (JWS 3309 spec) every 60,000–90,000 km, replacing the strainer and pan gasket at the same time, cleaning magnets and setting the fluid level at the correct temperature. Signs that it’s overdue include delayed engagement, flare on upshifts or a shudder. Towing, hot climates and stop–start driving shorten service intervals, so err on the conservative side if that’s your use case.

For V6 autos (AW6A‑EL/TF‑80SC), the filter sits internally and isn’t considered a routine service item by the manufacturer. The smart play is periodic ATF refreshes (again, Mazda ATF M‑V to the correct spec) at 60,000–80,000 km, monitoring shift quality and fluid condition. If there are symptoms of restriction or contamination, a specialist can inspect the valve body and internal strainer during deeper service or repair. Replacing that filter typically requires more than just dropping the pan, so it’s done only when there’s a compelling reason.

Technical references used: Mazda 2009 Mazda6 (GH) Workshop Manual – Automatic Transaxle sections for FS5A‑EL and AW6A‑EL/TF‑80SC, Aisin Warner TF‑80SC service information, Mazda electronic parts catalogue listings identifying the FS5A‑EL “oil strainer.” Always confirm by VIN, as regional specs and transmissions vary.

• Use only the specified ATF (Mazda ATF M‑V/JWS 3309) unless the exact transmission documentation calls for otherwise.
• Replace the sump strainer on FS5A‑EL during fluid service, focus on fluid condition for AW6A‑EL/TF‑80SC.
• Have levels set at the correct temperature with the proper procedure.

Popular questions

Does a 2009 Mazda 6 have a transmission filter?
Yes, the auto models do. The 2.5L with the 5‑speed auto has a replaceable sump strainer/filter. The V6 6‑speed auto has an internal filter that isn’t normally serviced. Manual versions don’t use a transmission filter.

How often should the transmission filter be changed?
On the 2.5L 5‑speed auto, replace the strainer when you service the ATF, typically every 60,000–90,000 km in AU/NZ conditions. On the V6 6‑speed auto, the filter isn’t a routine item—focus on regular ATF changes and address the internal filter only during deeper repairs if needed.

What transmission fluid does the 2009 Mazda 6 use?
Most 2009 Mazda 6 automatics specify Mazda ATF M‑V (meeting JWS 3309). A drain-and-refill typically replaces around 3–4 litres, total fill is higher. Always verify the required fluid by VIN and the under‑bonnet label or workshop data.