Transmission Assembly for 2016-2018 Kia Sorento
Product Notes Read before buying
This is a used transmission for vehicles with all-wheel drive and the 3.3L V6 engine. Please verify that your vehicle's specifications match exactly before ordering.
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 |
|---|---|---|---|---|
| EX | SUV | 2016 - 2018 | V6 3.3L | AWD | Automatic |
| LX | SUV | 2016 - 2018 | V6 3.3L | AWD | Automatic |
| SX | SUV | 2016 - 2018 | V6 3.3L | AWD | Automatic |
| SX Limited | SUV | 2016 - 2018 | V6 3.3L | AWD | Automatic |
| EX Pack | SUV | 2017 | V6 3.3L | AWD | Automatic |
| SXL | SUV | 2017 - 2018 | V6 3.3L | AWD | 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 is a 2016-2018 Kia Sorento with the 3.3L V6 engine.
- Verify the vehicle is All-Wheel Drive (AWD) by checking for a rear driveshaft and differential.
- Locate the transmission tag on top of the case to verify the part number matches 45000-3BMG0.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support bar
- Subframe jack / transmission jack
- Professional OBD2 scan tool with bi-directional capabilities
- Torque wrench
- Fluid pump/filler
- Videoscope (optional)
Budget for these consumables at install:
- Genuine Hyundai/Kia ATF SP-IV (or SP-4M-1)
- Transmission Filter Kit (includes filter and oil pan/valve body cover gasket)
- Torque Converter Seal (input shaft seal)
- Axle Seals (both front axle seals and transfer case input/output seals)
- Cooler Line Flush Agent
What your vehicle’s computers will need after the swap:
What’s involved: TCM Adaptive Relearn & Solenoid Characteristic Value (QR Code) Data Transfer
A dealer-level or high-end professional bi-directional scan tool is required to perform the 'Oil Pressure Characteristics Input' (using the 68-digit QR code on top of the case) and the 'TCU Adaptive Values Reset'. VIN-specific programming is not required if reusing the original TCM.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Solenoid QR Code Photo: Take a clear photo of the 68-digit QR code sticker on top of the transmission case before installation, as it is hidden once installed.
- Torque Converter Seating: Ensure the torque converter is fully seated (engaging multiple times/clicks) into the front pump before bolting to the engine to avoid cracking the pump gear.
- AWD Transfer Case Splines: Clean and apply high-quality water-resistant extreme-pressure grease to the transfer case splines to prevent stripping.
- Fluid Level Check Procedure: Check fluid level via the overflow plug on the front plastic cover with the vehicle level, engine running in Park, and fluid temperature strictly between 122°F and 140°F (50°C - 60°C).
Easy to get right once you know them:
- Skipping the QR Code / Solenoid Programming: Results in extremely harsh shifting or slipping.
- Using the Wrong Fluid: Using generic or universal ATF instead of genuine SP-IV fluid causes shudder and clutch slippage.
- Forgetting to Grease the Transfer Case Splines: Leads to stripped splines and loss of AWD functionality.
- Failing to Flush the Cooler Lines: Reusing old lines without a flush introduces debris from the failed unit, clogging new solenoids.
- Improper Torque Converter Installation: Failing to fully seat the converter, which destroys the oil pump upon startup.
- Misdiagnosing Engine vs. Transmission Issues: Mistaking engine performance issues (like faulty sensors) for transmission failure.
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 externally mounted inhibitor switch.
🔎 Recommended at install: Perform software update to improve TCU logic.
🔎 Recommended at install: Program the unique 68-digit solenoid valve calibration data (QR code) into the TCM/PCM.
🔎 Recommended at install: Requires transmission teardown to replace the inner underdrive piston lip seal.
🔎 Recommended at install: Drop the pan and valve body to replace the internal wiring harness/sensor.
🔎 Recommended at install: Keep fluid clean and avoid overheating; replace solenoids or valve body if sticking occurs.
🔎 Recommended at install: Requires rebuild or replacement; prevent via regular fluid maintenance.
🔎 Recommended at install: Address pump bolt covering seal drain passage; verify leaks are not from the engine Oil Pressure Switch (TSB ENG237).
Researched from factory recalls, TSBs and OEM service data (reference unit 400-63206-5333643). 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
2016–2018 Kia Sorento 3.3L V6 AWD Transmission: Problems, Identification, and Used Replacement
Identify the A6LF2 transmission, understand what causes it to fail, and learn exactly what to look for when buying and installing a used OEM replacement 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: 45000-3BMG0R, 450003BMG0, 450003BMG0S
Fits Years: 2016 2017 2018
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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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