Transmission Assembly for 2015-2019 Hyundai Sonata
Product Notes Read before buying
This transmission fits vehicles with the 2.4L non-turbo gasoline engine and front-wheel drive. For 2015 Hyundai Sonata models, please verify the 8th digit of your vehicle's VIN is 'F' to ensure compatibility.
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 |
|---|---|---|---|---|
| GL | Sedan | 2015 - 2018 | L4 2.4L | FWD | Automatic |
| GLS | Sedan | 2015 - 2018 | L4 2.4L | FWD | Automatic |
| Limited | Sedan | 2015 - 2019 | L4 2.4L | FWD | Automatic |
| Premium | Sedan | 2015 - 2018 | L4 2.4L | FWD | Automatic |
| SE | Sedan | 2015 - 2019 | L4 2.4L | FWD | Automatic |
| Sport | Sedan | 2015 - 2019 | L4 2.4L | FWD | Automatic |
| Base | Sedan | 2016 - 2017 | L4 2.4L | FWD | Automatic |
| Sport Tech | Sedan | 2016 - 2017 | L4 2.4L | FWD | Automatic |
| SEL | Sedan | 2018 - 2019 | L4 2.4L | 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:
- Confirm the 8th digit of the VIN is 'F' (naturally aspirated 2.4L Theta II engine).
- Verify the engine is a non-hybrid 2.4L (not 2.0T, 1.6T, or 2.0L Hybrid).
- Confirm the current transmission barcode sticker displays A6MF2-2 or matches OEM part numbers 45000-3B790 / 45000-3B795.
- Verify the vehicle was manufactured for the US market.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support bar
- Transmission jack
- CV axle pry bar/popper
- Bi-directional scan tool (Hyundai KDS/GDS, Autel MaxiSYS, or Snap-on)
Budget for these consumables at install:
- Hyundai Genuine SP-IV (SP-4) specification fluid (approx. 7.5 to 9.0 quarts for dry fill)
- High-quality RTV liquid gasket (Three Bond 1281B or Loctite FMD-546) for front valve body cover
- Torque converter input shaft seal (OEM Part Number: 45264-3B000)
- Axle seals (both sides)
- Aerosol flush solvent for professional transmission cooler-line flush
What your vehicle’s computers will need after the swap:
What’s involved: TCM Adaptive Relearn AND Solenoid Valve Oil Pressure Characteristics Input (QR Code Calibration)
Requires writing the 68-digit calibration code from the transmission's QR sticker into the TCU using a bi-directional scan tool, followed by a TCM adaptive reset and stationary/drive learning procedures. Sources differ on whether a dealer-only tool is strictly required; a high-end aftermarket bi-directional scanner can also perform these functions.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque Converter Seating: Must click/drop inward three distinct times (recessed 10-12mm inside bellhousing face) to avoid destroying the internal oil pump gears upon bolting to the engine.
- Take a Photo of the QR Code: Photograph the 68-digit code on top of the case before installation, as it is completely buried once installed.
- Fluid Level Check Procedure: No dipstick. Must check at 50C-60C (122F-140F) with engine running in Park on a level surface via the check plug on the front plastic valve body cover.
- Subframe Alignment: Ensure subframe alignment dowels are perfectly aligned during reassembly to prevent off-center steering and alignment issues.
- Internal Wiring Harness/Temp Sensor: Consider replacing the high-failure internal harness/sensor on the bench before installing if high mileage.
Easy to get right once you know them:
- Ordering a Sonata Hybrid transmission (A6MF2H) which lacks a traditional torque converter and will not fit.
- Skipping the 68-digit solenoid QR code programming, leading to immediate shift lag, harsh engagement, or slipping.
- Using incorrect fluid (older SP-III or generic non-low-viscosity ATF) instead of SP-IV.
- Leaving alignment dowels stuck in the engine or double-doweling, causing input shaft vibration and pump destruction.
- Skipping the transmission cooler line flush, which immediately contaminates the new unit with debris from the failed transmission.
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: Program the 68-digit calibration code from the transmission's QR sticker into the vehicle's computer (TCU) upon installation.
🔎 Recommended at install: Replace solenoid pack and internal harness due to varnish buildup or electrical wear.
🔎 Recommended at install: Replace the internal wiring harness (which contains the integrated sensor); requires removing the valve body.
🔎 Recommended at install: Perform fluid level check, reset adaptive learning values, or diagnose internal hydraulic/mechanical issues.
🔎 Recommended at install: Internal transmission rebuild/repair.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-62856-5353723). 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
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Identify what kills the 6-speed A6MF2 transaxle, when to rebuild, and how to buy and program a used OEM replacement unit.
Read Full Guide →Related Trouble Codes (OBD-II)
36 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:
Hyundai: 45000-3B790, 45000-3B795, A6MF2-2, A6MF22
Other: 002683BEV0, 002683BKA0, 450003B790, 450003B795, 450003BEV0, 450003BEV2, 450003BEV4, 450003BKA0, 451003B510, KJ
Fits Years: 2015 2016 2017 2018 2019
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