6-Speed Automatic Transmission Assembly for 2020-2023 Hyundai Sonata
Product Notes Read before buying
This is a 6-speed automatic transmission for 2020-2023 Hyundai Sonata models equipped with the 2.0L Hybrid engine and front-wheel drive (FWD).
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 |
|---|---|---|---|---|
| Hybrid Blue | Sedan | 2020 - 2023 | L4 2.0L FULL HYBRID EV-GAS (FHEV) | FWD | Automatic |
| Hybrid Limited | Sedan | 2020 - 2023 | L4 2.0L FULL HYBRID EV-GAS (FHEV) | FWD | Automatic |
| Hybrid SEL | Sedan | 2020 - 2023 | L4 2.0L FULL HYBRID EV-GAS (FHEV) | FWD | Automatic |
| Hybrid Ultimate | Sedan | 2020 - 2023 | L4 2.0L FULL HYBRID EV-GAS (FHEV) | FWD | Automatic |
| 2021 - 2022 |
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 vehicle is a Sonata Hybrid (check for Hybrid badging on the trunk).
- Verify the 8th digit of the VIN is 'J' or 'K' (denotes 2.0L GDI Hybrid engine).
- Verify the vehicle uses the electronic push-button shifter (Shift-by-Wire) on the center console.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- High-voltage insulated safety gloves (Class 0, rated for 1,000V)
- Insulated hand tools
- Engine support bar
- Transmission jack
- Bi-directional OBD-II scan tool with Hyundai-specific software (GDS/KDS)
Budget for these consumables at install:
- Hyundai Genuine ATF SP4-M (SP-IV-M or SP4-M1) fluid
- Hyundai Genuine HSG/Inverter Coolant (low-conductivity coolant)
- Left axle shaft seal (OE 45245-3B210)
- Right axle shaft seal (OE 45245-3B200)
- Input shaft front cover seal (OE 45245-3D010)
- Transmission filter and pan gasket
What your vehicle’s computers will need after the swap:
What’s involved: Solenoid Barcode Data Transfer (Oil Pressure Characteristics Input) & Adaptive Relearn
You must use a dealer-level scan tool to input the unique solenoid barcode values printed on the transmission case sticker into the PCM/TCU. Additionally, a standard clutch adaptive relearn / Resetting Auto T/A Values procedure must be initiated. Skipping these steps causes blinking shift indicators, severe shift shock, harsh gear engagements, or clutch slippage.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- High-Voltage De-Energization: Must pull the high-voltage safety plug in the trunk/rear seat area and wait at least 10 minutes. Verify 0V with a multimeter before touching orange cables.
- Hybrid Cooling Loop Bleeding: Must use a scan tool to command the hybrid electric water pump to run to bleed air pockets from the electric motor cooling jacket to prevent overheating.
- No Torque Converter Alignment: This transmission bolts directly to the engine's dual-mass flywheel/damper via the internal engine clutch. Ensure perfect alignment and never use bellhousing bolts to force them together.
- Fluid Level Checking Procedure: No dipstick. Vehicle must be level, engine running, fluid temp between 122F and 140F. Fluid must flow out of the level checking plug in a thin, steady stream.
- Subframe Removal: The easiest way to remove the transmission is by dropping the entire front subframe while supporting the engine from above.
Easy to get right once you know them:
- Ordering this transmission for a standard, non-hybrid Sonata.
- Assuming the unit is plug-and-play and skipping the mandatory Solenoid Barcode Data Transfer and adaptive relearn.
- Using generic multi-vehicle ATF instead of genuine Hyundai SP4-M fluid, which causes clutch slippage and shudder.
- Failing to professionally flush the transmission fluid warmer/cooler lines, allowing trapped debris from the failed unit to destroy the replacement.
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: Diagnose and replace transmission if internal clutch slippage is confirmed.
🔎 Recommended at install: Follow diagnostic procedure for electronic shift-by-wire (SBW) actuator faults.
🔎 Recommended at install: Reprogram Transmission Control Unit (TCU) with updated software.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-11120-5039517). 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
2020-2023 Hyundai Sonata Hybrid A6MF2H-1 Transmission: Problems, Identification, and Used Replacement
Identifying the 6-speed TMED hybrid transmission, common clutch failures, and what to know before installing a used OEM replacement assembly.
Read Full Guide →Related Trouble Codes (OBD-II)
4 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: 002683D801, 2683D801, 450003D801
Fits Years: 2020 2021 2022 2023
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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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