FW6A-EL Transmission Service Kit with Filter and 6L ATF

If your Mazda3, Mazda6, CX-3, CX-5 or CX-9 has passed 60,000 or 100,000 miles on its original SkyActiv-Drive fluid and you are starting to feel a lazy 1-2 shift, a soft engagement into Drive on cold mornings, or dark fluid on the dipstick, this kit covers the whole pan service in one box: the internal filter, a new pan gasket and six 1-liter bottles of Liqui Moly Top Tec ATF 1800 (kit number MZD22.5-6LKIT).

What the filter and fluid do in a FW6A-EL

The FW6A-EL is Mazda's six-speed SkyActiv-Drive automatic. Mazda designed it to lock the torque converter clutch over a much wider range than older automatics, which is where its direct, manual-like feel comes from, and that means the lockup clutch and the shift clutches all live on the same thin, low-viscosity fluid. Mazda specifies ATF-FZ for this unit and describes it as a low-friction formula made for SkyActiv-Drive only. The internal filter sits on the pump pickup inside the pan and catches clutch material and fine metal before it reaches the pump and the solenoid-controlled valve body. There are no external cooler lines on this transaxle: Mazda mounts the cooler directly to the case, so there is no line flush to worry about, but there is also no external filter to catch anything the internal one misses.

Symptoms that point to a fluid and filter service

• Fluid on the dipstick that is dark, smells burnt or no longer shows the blue color new FZ fluid has
• Slow or soft engagement into Drive or Reverse, worst when cold
• Shudder at light throttle while cruising, when the converter clutch is applying
• Firm or flared upshifts that came on gradually, not suddenly
• Fluid weeping from the pan rail after an earlier pan job with a reused gasket

A sudden no-move, a loud grinding noise or a transmission warning that returns right after clearing is not a service problem. Diagnose that first.

How to confirm before you buy

Check the level and condition the way Mazda does it. The FW6A-EL does have a dipstick, held in by a small securing bolt. Warm the fluid to 50 C (122 F), read it with the engine idling, and the level should sit between the L and F marks. Mazda's procedure reads transmission fluid temperature on the scan tool, so a reader that shows transmission data, like the Ancel DS200 all-system scanner, saves guessing. Compare what you see against our ATF color and smell chart, and if you have a slip under load rather than a shift-quality complaint, work through the transmission slipping diagnosis guide before spending money on fluid.

Fitment

The kit is listed for Mazda3 2.0L 2012-2018, Mazda3 2.5L 2014-2019, Mazda6 2.5L 2014-2018, CX-3 2.0L 2016-2020, CX-5 2.0L 2013-2016, CX-5 2.5L 2014-2019 and CX-9 2.5L 2016-2020. Mazda built more than one SkyActiv-Drive variant in these years, including AWD and turbo versions with their own service procedures, and the filter shape changed across the span. Compare the filter and pan gasket in the photos to what is on your car, or send us your year and VIN and we will check it before it ships. More service parts are in our transmission fluids and service kits section.

Install notes

• Drain at the pan plug, drop the pan and pull the old filter straight off the pickup. Make sure its seal came out with it.
• Clean the pan magnets and both sealing surfaces, fit the new filter and gasket, and snug the pan bolts evenly in a crossing pattern. A small-drive digital torque wrench set keeps these light fasteners from being stripped.
• Refill through the case, start the engine, cycle the selector through every range, then set the final level on the dipstick at 50 C. Mazda's dipstick bolt spec is 8-11 Nm.
• A hand ATF pump with adapters makes the refill far cleaner than a funnel on a front-drive car.

About the fluid: Mazda's own bulletin calls for ATF-FZ only and says flushing is not recommended. Liqui Moly lists Mazda ATF FZ among the specifications Top Tec ATF 1800 is recommended for. Mazda lists no change interval for this unit, so this is a drain-and-fill service, not a flush. Our drain-and-fill walkthrough explains why one pan drop replaces only part of the fluid, and why a second drain-and-fill a few hundred miles later gets you most of the way to all-new fluid.

Does the FW6A-EL have a dipstick?

Yes. It sits under a small securing bolt. Mazda's service procedure has you warm the fluid to 50 C (122 F), wipe and reinsert the dipstick with the engine idling, and confirm the level is between the L and F marks.

What fluid does the SkyActiv-Drive six-speed use?

Mazda specifies ATF-FZ, a blue low-viscosity fluid made for SkyActiv-Drive transaxles. This kit includes Liqui Moly Top Tec ATF 1800, which Liqui Moly lists as recommended for Mazda ATF FZ applications. Never use ATF-FZ in an older non-SkyActiv Mazda automatic.

Mazda says the fluid is filled for life. Why service it?

Mazda lists no change interval, but fluid still breaks down with heat and miles, especially with towing, short trips or hot climates. Many owners do a pan service around 60,000 miles to protect the converter lockup clutch and shift feel. Mazda does not recommend flushing, so do a drain-and-fill.

Will this kit fit my CX-5 or CX-9?

It is listed for CX-5 2.0L 2013-2016, CX-5 2.5L 2014-2019 and CX-9 2.5L 2016-2020. Mazda used more than one SkyActiv-Drive variant and filter shape, so compare the filter and gasket photos to your car, or send your year and VIN before ordering.

Do I need a scan tool for this job?

It helps a lot. The level is checked at a specific fluid temperature, and Mazda's procedure reads that temperature from the transmission data. A scanner that shows transmission fluid temperature takes the guesswork out of the final level check.

• How to Do a Transmission Drain and Fill
• ATF Color and Smell Diagnosis Chart
• Transmission Flush vs Drain and Fill
• Transmission Slipping Diagnosis Guide