Transmission Assembly for 2017-2018 Mazda 3
Product Notes Read before buying
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Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| Grand Touring | Hatchback | 2017 - 2018 | L4 2.5L | FWD | Automatic |
| Grand Touring | Sedan | 2017 - 2018 | L4 2.5L | FWD | Automatic |
| GT | Sedan | 2017 - 2018 | L4 2.5L | FWD | Automatic |
| I Touring | Hatchback | 2017 - 2018 | L4 2.5L | FWD | Automatic |
| I Touring | Sedan | 2017 - 2018 | L4 2.5L | FWD | Automatic |
| S | Hatchback | 2017 - 2018 | L4 2.5L | FWD | Automatic |
| S | Sedan | 2017 - 2018 | L4 2.5L | FWD | Automatic |
| s Grand Touring | Hatchback | 2017 - 2018 | L4 2.5L | FWD | Automatic |
| s Grand Touring | Sedan | 2017 - 2018 | L4 2.5L | FWD | Automatic |
| Touring | Hatchback | 2017 - 2018 | L4 2.5L | FWD | Automatic |
| Touring | Sedan | 2017 - 2018 | L4 2.5L | FWD | 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' (for 2.5L with cylinder deactivation) or confirm engine cover says 'SKYACTIV-G 2.5'.
- Confirm vehicle is Front-Wheel Drive (FWD) by checking for the absence of a rear differential and rear CV axles.
- Check the white paper barcode label on top of the original transmission to match part number FWJ7-03-000A or FWJ703000.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support bar or hoist
- Heavy-duty transmission jack or subframe adapter
- CV axle puller/slide hammer
- Professional-grade OBD-II diagnostic scan tool (Mazda IDS/MGSS/J2534)
Budget for these consumables at install:
- Mazda Genuine ATF-FZ (Blue low-viscosity fluid, Part # 0000-FZ-113E-01)
- Transmission Filter (Part # FZ01-21-500)
- High-quality RTV liquid silicone sealant (ThreeBond 1207C or equivalent)
- Input shaft / pump seal (Torque converter seal)
- Axle seals
- Transmission cooler flush solvent
What your vehicle’s computers will need after the swap:
What’s involved: TCM Adaptive Relearn (Initial Learning Procedure) and potential TCM software update
An Initial Learning Procedure (adaptive relearn) is mandatory to prevent harsh shifting and clutch damage. If the replacement TCM is used, or to address shift shock TSBs, a full VIN-specific software reprogram using a dealer-level tool (Mazda IDS/MGSS) is required.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque converter must be fully seated into the front pump before bolting to the engine to prevent cracking the pump gear.
- The front subframe must be dropped and carefully aligned during reinstallation to prevent steering and suspension misalignment.
- The case-mounted heat exchanger cannot be easily flushed; if the previous unit had mechanical failure, the heat exchanger must be replaced entirely.
- Transmission fluid level must be checked using the dipstick only when fluid is warm (122°F to 140°F / 50°C to 60°C).
Easy to get right once you know them:
- Ordering for a 2.0L engine instead of the 2.5L engine.
- Ordering for an AWD vehicle instead of a FWD vehicle.
- Reusing a contaminated case-mounted cooler without flushing or replacing it.
- Skipping the TCM adaptive relearn procedure.
- Using standard red multi-vehicle ATF instead of the required blue Mazda ATF-FZ.
- Misdiagnosing a bad wheel bearing noise as a transmission failure.
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 flush system to remove iron powder contamination.
🔎 Recommended at install: Requires case replacement or specialized repair due to bearing rotating in seat.
🔎 Recommended at install: TCM reprogram or replacement of oil pressure switches inside the valve body (DTCs P0842, P0847, P0872, P0877, P0780).
🔎 Recommended at install: PCM software update to prevent unexpected engine stalls affecting torque converter clutch engagement.
🔎 Recommended at install: TCM software reprogram to update control logic.
🔎 Recommended at install: Distinguish between transmission noise and wheel bearing noise before replacing unit.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-11061-5320925). 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
2017-2018 Mazda 3 2.5L SkyActiv-Drive Transmission: Problems, Identification, and Used Replacement
Identify the FW6A-EL transmission, understand what causes torque converter and shift shock failures, and learn when to replace it with a used OEM unit.
Read Full Guide →Related Trouble Codes (OBD-II)
2 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: FWJ7-03-000A, FWJ703000
Fits Years: 2017 2018
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This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
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