Automatic Transmission Assembly with i-ELOOP System for 2014-2015 Mazda
Product Notes Read before buying
This is a 6-speed automatic transmission for front-wheel-drive models equipped with the 2.5L engine. It is critical to verify that your vehicle has the i-ELOOP regenerative braking system, as this transmission will NOT fit models without it.
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 |
|---|---|---|---|---|
| Grand Touring | Sedan | 2014 - 2015 | L4 2.5L | - |
| GS | Sedan | 2014 - 2015 | L4 2.5L | - |
| GT | Sedan | 2014 - 2015 | L4 2.5L | - |
| GX | Sedan | 2014 - 2015 | L4 2.5L | - |
| i | Sedan | 2014 - 2015 | L4 2.5L | - |
| Sport | Sedan | 2014 - 2015 | L4 2.5L | - |
| Touring | Sedan | 2014 - 2015 | L4 2.5L | - |
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 vehicle has the i-ELOOP system (check dashboard center screen for i-ELOOP energy monitor or look for the silver capacitor behind the driver's side headlight).
- Verify the engine is a naturally aspirated 2.5L SkyActiv-G (not a 2.0L or 2.5L Turbo).
- Check the World Manufacturer Identifier (first 3 characters of VIN) is 'JM1' (Japanese-built).
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support bar
- Subframe adapter or subframe jack
- Heavy-duty transmission jack
- Professional diagnostic scan tool with J2534 / Mazda-specific capabilities
Budget for these consumables at install:
- Mazda Genuine ATF-FZ (Blue low-viscosity fluid)
- Transmission filter (Mazda Part #FZ01-21-500)
- RTV silicone sealant (for oil pan)
- Front pump/input shaft seal (torque converter seal)
- Axle seals
- Professional transmission cooler line flush agent
What your vehicle’s computers will need after the swap:
What’s involved: TCM Configuration & TCM Initial Learning (Clutch Value Relearn)
A dealer-level scan tool (such as Mazda M-MDS) or high-end professional equivalent is required to perform TCM Configuration to marry the replacement unit to the vehicle's PCM, followed by the TCM Initial Learning procedure to calibrate solenoids to clutch clearances.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque Converter Seating: Must be fully seated and engaged with front pump gears before bolting to engine to prevent cracking the front oil pump.
- i-ELOOP High-Voltage Safety: Disconnect battery and handle electrical connections with caution due to the high-capacity double-layer capacitor (stores up to 25V).
- Cooler Line Flush: Mandatory power flush of cooler lines to prevent leftover metal debris from contaminating the replacement unit's tight-tolerance solenoids.
- Subframe Alignment: Professional four-wheel alignment is required immediately after installation since the front subframe must be dropped.
Easy to get right once you know them:
- Ordering for a non-i-ELOOP vehicle (standard Mazda 6 models use a different, incompatible transmission configuration).
- Using generic multi-vehicle ATF (such as Valvoline MaxLife) instead of Mazda Genuine ATF-FZ (blue fluid), which causes clutch slippage and premature failure.
- Skipping the TCM Initial Learning / Relearn procedure, leading to violent shifting, slipping, or immediate diagnostic codes.
- Reusing the old torque converter/input shaft seal, resulting in immediate fluid leaks.
- Skipping the transmission cooler line flush, leading to immediate contamination and failure of the replacement unit.
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 transmission or internal case center bearing (TSB 05-005/20 / TSB 05-002/19)
🔎 Recommended at install: Replace oil pressure switches on internal valve body (TSB 05-002/23 / TSB 05-005/14)
🔎 Recommended at install: Reprogram Powertrain Control Module (PCM) with updated software (Recall 14V173000 / 14V183000)
Researched from factory recalls, TSBs and OEM service data (reference unit 400-62542-5589047). 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
2014-2015 Mazda 6 2.5L i-ELOOP Transmission: Problems, Identification, and Used Replacement
Identify the exact FW6A-EL variant for your i-ELOOP equipped Mazda 6, understand common bearing and pressure switch failures, and learn when to replace it with a used OEM unit.
Read Full Guide →Related Trouble Codes (OBD-II)
9 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: FWH303000, FWH903000, FZH919090
Fits Years: 2014 2015
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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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