Transmission Assembly with Torque Converter and Cooling Pump for 2012-2013 Kia
Product Notes Read before buying
This transmission assembly is for vehicles equipped with the 2.0L engine and the Idle Stop & Go (ISG) feature, also known as automatic engine stop/start. It will not fit vehicles without this specific feature.
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 |
|---|---|---|---|---|
| ! | Hatchback | 2012 - 2013 | L4 2.0L | FWD | Automatic |
| + | Hatchback | 2012 - 2013 | L4 2.0L | FWD | Automatic |
| 2u | Hatchback | 2012 - 2013 | L4 2.0L | FWD | Automatic |
| 4u | Hatchback | 2012 - 2013 | L4 2.0L | FWD | Automatic |
| 4u Burner | Hatchback | 2012 | L4 2.0L | FWD | Automatic |
| 4u Luxury | Hatchback | 2012 - 2013 | L4 2.0L | FWD | Automatic |
| 4u Retro | Hatchback | 2012 | L4 2.0L | 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 vehicle has the Idle Stop & Go (ISG) system (look for 'Eco' badge on tailgate and 'ISG Off' button on lower left dash panel).
- Verify the 8th digit of the VIN is '6' (indicating the 2.0L Nu engine).
- Verify the presence of the external electric oil pump (part number 46110-26300) bolted to the original transmission case.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support bar
- Transmission jack
- Torque wrench
- OBD2 scan tool with bi-directional capabilities (Kia GDS/KDS)
Budget for these consumables at install:
- Hyundai/Kia Genuine ATF SP-IV (7.3 to 7.8 quarts total capacity)
- Torque converter seal (front pump seal, part number 46131-3B600 or 46131-26AS0)
- Axle seals
- RTV silicone or specialized front cover gasket (part number 45282-26100)
- Professional cooler-line flush solvent
What your vehicle’s computers will need after the swap:
What’s involved: TCM Adaptive Relearn (Resetting adaptive shift values)
A TCM adaptive value reset and a two-part relearn procedure (stationary and driving) are mandatory after installation using a professional bi-directional scan tool (such as Kia GDS/KDS, Autel, or Launch). No VIN-specific programming or immobilizer re-marriage is required.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque Converter Seating Depth: Ensure the torque converter is fully seated (approx. 1 cm / 0.4 inches recessed from the bellhousing flange) and spins easily by hand before bolting to the engine to avoid cracking the front pump.
- Alignment Dowels: Verify alignment dowels are present in the engine block. Missing dowels cause misalignment, destroying the front pump seal within 100 miles.
- Fluid-Fill and Level-Check Procedure: No dipstick. Must check fluid level at 122°F to 140°F (50°C to 60°C) with engine running and vehicle level, using the level plug on the front plastic cover.
- Idle Stop & Go (ISG) Calibration: Allow the vehicle to remain undisturbed for at least 4 hours post-install for the battery sensor and ISG system to perform self-recalibration.
- Cooler Line Flush: Mandatory to flush the transmission cooler and lines to prevent debris from the failed unit from contaminating the replacement transmission.
Easy to get right once you know them:
- Ordering for a non-ISG vehicle: This transmission is specifically for ISG-equipped models and includes an external electric oil pump. It will not function in a non-ISG vehicle.
- Skipping the TCM Adaptive Relearn: Failing to reset adaptive values causes harsh shifting, slipping, and premature clutch burnout.
- Improperly Seating the Torque Converter: Bolting the transmission to the engine with an unseated converter breaks the front pump and voids the warranty.
- Attempting to Replace the Filter: The filter is internal and cannot be replaced without splitting the transmission case halves.
- Using Incorrect Fluid: Using generic multi-vehicle ATF instead of the required SP-IV fluid causes shifting issues and internal damage.
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 the TFT sensor located on the internal wiring harness inside the front cover (TSB TRA 051 / NHTSA SB-10090166-5448).
🔎 Recommended at install: Diagnose and replace individual solenoids on the valve body as outlined in TSB TRA 051.
🔎 Recommended at install: Replace front pump seal (torque converter seal) during installation.
🔎 Recommended at install: Sleeve or replace worn valve body components to restore stable line pressure.
🔎 Recommended at install: Perform mandatory adaptive value reset and relearn procedure using a dealer scan tool.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-62173-4583780). 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
2012-2013 Kia Soul A6MF1 Transmission: Problems, Identification, and Used Replacement
Identify the exact ISG-specific A6MF1 transmission, learn what causes harsh shifting, and discover when to replace it with a used OEM unit.
Read Full Guide →Related Trouble Codes (OBD-II)
14 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: 450003BDX0, 450003BDX0R
Kia: 450003BDX0S, 4611026300
Fits Years: 2012 2013
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
