Transmission Assembly for 2017-2022 Kia Sportage
Product Notes Read before buying
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 |
|---|---|---|---|---|
| SX | SUV | 2017, 2021 - 2022 | L4 2.0L Turbo | AWD | Automatic |
| SX Turbo | SUV | 2017 - 2022 | L4 2.0L Turbo | AWD | Automatic |
| 2018 - 2020 |
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 6 (indicating the 2.0L Turbo engine).
- Verify the vehicle is All-Wheel Drive (AWD) by checking for a rear differential and driveshaft.
- Locate the barcode sticker on top of the transmission case and confirm the OEM part number is 45000-3BMX0.
- Verify the etched code on the metal case begins with the letters BA.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support bar
- Transmission jack
- Subframe jack
- Professional bidirectional OBD2 scan tool (Kia-compatible GDS/KDS)
Budget for these consumables at install:
- Kia Genuine ATF SP-IV fluid (approx. 7.8 to 9 quarts for full flush and fill)
- Torque converter seal (front pump / input shaft seal)
- Left and right CV axle seals
- Aerosol transmission cooler line flush solvent
- AWD Transfer Case Fluid (75W-90 GL-5 gear oil, approx. 0.7 liters)
- High-quality water-resistant high-pressure spline grease (e.g., Mobilgrease XHP 222)
- Transmission filter and pan gasket
What your vehicle’s computers will need after the swap:
What’s involved: TCM Adaptive Relearn / Reset
A mandatory TCM Adaptive Value Reset must be performed using a dealer-level scan tool (GDS/KDS) to erase old learned shift patterns, followed by a specific stationary and drive relearn procedure.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque Converter Seating: Ensure the torque converter is fully pushed back and engaged (three distinct clicks/drops) before bolting to the engine to avoid destroying the oil pump.
- AWD Spline Rust Prevention: Apply water-resistant grease to the mating splines of the transmission and transfer case to prevent moisture intrusion and stripping.
- Fluid Level Check Procedure: No dipstick is present. Fluid level must be checked via the overflow plug on the front valve body cover with the vehicle level, engine running, and fluid temperature between 122°F and 140°F.
- Mandatory Programming: Skipping the TCM adaptive reset will cause immediate harsh shifting, slipping, and potential transmission damage.
Easy to get right once you know them:
- Buying a FWD transmission for an AWD vehicle (FWD cases lack the necessary mounting holes and internal splines for the transfer case).
- Confusing the A6MF and A6LF transmission families (ordering a transmission from a 2.4L Sportage which will not bolt up to the 2.0L Turbo engine).
- Skipping the transmission cooler line flush, which allows debris from the old failed unit to contaminate and destroy the replacement unit.
- Using generic multi-vehicle ATF instead of genuine Kia SP-IV fluid.
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 sensor harness inside the side cover.
🔎 Recommended at install: Replace or realign the inhibitor switch.
🔎 Recommended at install: Clean rust off transfer case splines and apply high-quality water-resistant grease during installation.
🔎 Recommended at install: Avoid aggressive driving; inspect internal components if slipping occurs.
🔎 Recommended at install: Check fluid level, perform TCM adaptive value reset, or inspect torque converter.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-10090-5589873). 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
2017-2022 Kia Sportage 2.0L Turbo A6LF2: Problems, Identification, and Used Replacement
Identify the exact A6LF2 transmission, learn what causes AWD spline and sensor failures, and know when to replace it with a used OEM unit.
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:
Kia: 45000-3BMX0R, 450003BMX0, 450003BMX0R, 450003BMX0S, 450003F820, 450003F820R
Fits Years: 2017 2018 2019 2020 2021 2022
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Backed By The Selling Yard
This unit ships with the selling yard's 120-day warranty. Longer plans can be requested during checkout.
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