Automatic Transmission Assembly for 2020-2021 Mazda CX-30
Product Notes Read before buying
This automatic transmission fits Mazda CX-30 models with the 2.5L naturally aspirated (non-turbo) engine, All-Wheel Drive (AWD), AND cylinder deactivation. It will not fit models without cylinder deactivation, FWD models, or vehicles with the 2.5L turbo engine.
Voice or type your vehicle details and Wrenchy will confirm fitment in seconds.
Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Base | SUV | 2020 | L4 2.5L | AWD | Automatic |
| GS | SUV | 2020 - 2021 | L4 2.5L | AWD | Automatic |
| GT | SUV | 2020 - 2021 | L4 2.5L | AWD | Automatic |
| Preferred | SUV | 2020 | L4 2.5L | AWD | Automatic |
| Premium | SUV | 2020 | L4 2.5L | AWD | Automatic |
| Select | SUV | 2020 | L4 2.5L | AWD | Automatic |
Know This Transmission Before You Buy
The research behind our purchase interview — recalls, bulletins and real install economics for this transmission family:
A quick look at your own vehicle makes sure the right transmission shows up:
- Verify the 8th digit of the VIN is 'M' to confirm cylinder deactivation.
- Confirm the vehicle is All-Wheel Drive (AWD).
- Verify the engine is a 2.5L Naturally Aspirated (non-turbo) engine.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support bar
- Subframe adapter/jack
- Transmission jack
- OBD-II scan tool with Mazda-specific capabilities (e.g., MDARS)
Budget for these consumables at install:
- Mazda Genuine ATF-A7 or ATF FZ (sources differ on fluid spec for cylinder deactivation)
- Transmission filter
- Transmission pan gasket or high-quality RTV silicone sealant
- Torque converter input shaft seal
- Axle shaft seals
- Professional-grade transmission cooler flush
What your vehicle’s computers will need after the swap:
What’s involved: TCM Adaptive Value Reset and Learning Procedure
sources differ: Arm 1 states a manual key-and-shifter sequence can perform the relearn, while Arm 2 states a dealer-level scan tool (MDARS) is required. A scan tool is highly recommended to prevent immediate clutch damage.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque converter must be fully seated (three distinct drops/clicks) before bolting to engine to avoid destroying the oil pump.
- Cylinder deactivation models use a specialized heavy-duty torque converter with internal pendulum dampers that cannot be swapped with standard units.
- The integrated oil cooler must be replaced or extensively flushed to prevent old metal debris from contaminating the replacement unit.
- Fluid level must be checked using the short dipstick located under the air filter box (secured by a 10mm bolt) with fluid warm (50C-60C) while idling in Park.
Easy to get right once you know them:
- Ordering a FWD transmission (FW6A-EL) or Turbo transmission (GW6AX-EL) instead of the AWD naturally aspirated version.
- Ignoring the cylinder deactivation requirement and ordering a non-cylinder deactivation transmission.
- Reusing a contaminated oil cooler without flushing, leading to premature failure.
- Skipping the TCM adaptive relearn procedure, causing immediate harsh shifting and clutch wear.
- Using standard multi-vehicle ATF instead of the specified Mazda fluid.
Not issues with the units on this page — the manufacturer documented these for every transmission of this family, wherever you buy one. Handy for your installer:
🔎 Recommended at install: Replace torque converter and thoroughly flush system if fluid is contaminated with iron powder.
🔎 Recommended at install: Modify radiator mounting brackets and update PCM software.
🔎 Recommended at install: Replace stuck oil pressure switches or update TCM software.
🔎 Recommended at install: Perform TCM adaptive learning reset or update software.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-11267-5252882). Unit-specific details — mileage, condition, warranty, freight — are covered in the checkout interview.
Policies, in plain English.
Shipping & Handling
- Ships by LTL freight on a pallet — a real freight truck, not a parcel van
- Your checkout freight quote covers delivery to your door (liftgate service included for residential addresses)
- The carrier calls ahead to schedule a delivery window — someone must be present to receive it
- Typically palletized and picked up within 2–3 business days; transit time depends on distance
120-Day Warranty
This part includes a 120-day warranty.
- If the part fails within the warranty window, we'll replace it or refund per the coverage terms
- Coverage is parts-only — installation labor is not included
- Warranty covers defects — not installation errors, misuse, or damage after installation
Your pre-purchase interview reviews these exact terms with you before anything is charged.
Returns (30 Days)
We accept returns of uninstalled parts within 30 days of delivery for this part.
- Defective parts: We will replace the part or issue a refund at our discretion
- Programming: "Needs to be programmed to my vehicle" is not a valid return reason. Many modules require dealer programming — we're happy to help connect you with resources if your dealer says it's not programmable
- Return shipping: This part ships by freight (LTL) — the part price is refundable per the terms above, but shipping costs are non-refundable and return freight follows the seller's return terms. Your pre-purchase interview walks through the exact numbers before you buy
- Parts must be returned in original packaging and unmodified condition
- Poorly packaged returns that arrive damaged will not be credited
Damaged in Shipping?
Freight damage is rare — and you're fully protected when you do two things at delivery:
- Inspect before you sign — you're allowed time to look the pallet over while the driver waits
- Write any damage on the delivery receipt before signing — that one line is what makes a freight claim succeed
- Severe damage? Refuse the delivery — it goes back at no cost to you and we make it right
- Photograph the pallet before unwrapping; report concealed damage within 24 hours of delivery
We handle the carrier claim — you just help document it. Your pre-purchase interview walks through this checklist too.
Order Cancellation
Cancel before shipment for a full refund. Once the pallet has been built, a preparation charge may apply — and once the freight carrier picks it up, shipping costs are non-refundable and standard return terms apply. Your pre-purchase interview shows the exact numbers before you pay.
Expert Guides
2020-2022 Mazda CX-30 SkyActiv-Drive Transmission: Problems, Identification, and Used Replacement
Identify the exact AWD non-cylinder deactivation unit, understand what causes torque converter failure, and learn when to replace it with a used OEM transmission.
Read Full Guide →Related Trouble Codes (OBD-II)
8 matching guidesIf your scan tool is showing one of these trouble codes, this part is a common fix. Each guide explains the code, how to diagnose it, and exactly what to replace.
Miscellaneous Information
OEM Part Numbers:
Mazda: EVX403000, EVXB-03-000
Fits Years: 2020 2021
Your Go-To Place
for auto parts.
In operation since 2007. Trusted by over a million DIYers, mechanics, and body shops across all 50 states.
Confirmed Before It Ships
Every freight order is confirmed through a short guided interview — fitment, condition, delivery and warranty terms, e-signed before you're charged.
Trusted Since 2007
Nearly two decades of shipping parts to professionals & enthusiasts.
Backed By The Selling Yard
This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
What buyers are saying.
Racing Partner Videos
