CVT Transmission Assembly for 2023-2026 Honda Accord
Product Notes Read before buying
This transmission fits models with the 1.5L turbocharged engine ONLY. It will NOT fit models with the 2.0L hybrid powertrain.
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 | Sedan | 2023 - 2024 | L4 1.5L Turbo | FWD | Automatic CVT |
| LX | Sedan | 2023 - 2026 | L4 1.5L Turbo | FWD | Automatic CVT |
| Prime | Sedan | 2023 - 2025 | L4 1.5L Turbo | FWD | Automatic CVT |
| SE | Sedan | 2025 - 2026 | L4 1.5L Turbo | FWD | Automatic CVT |
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:
- Verify the 4th, 5th, and 6th digits of the VIN are CY1 (designates 1.5L Turbo). If CY2, the vehicle is a Hybrid and this will not fit.
- Confirm the vehicle trim level is LX or EX (Sport, EX-L, Sport-L, and Touring are Hybrids).
- Physically check the barcode label on the original transmission case for the part number 20031-6MM-A01 or the 6MM/s6MMC21 designation.
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support bar/hoist
- Subframe adapter/jack
- Torque wrench
- Bidirectional scan tool (Honda i-HDS or equivalent)
- Fluid pump or long-funnel system
Budget for these consumables at install:
- Genuine Honda HCF-2 CVT Fluid (Do NOT use standard ATF or generic CVT fluids)
- New transmission pan gasket
- New torque converter seal (input shaft/front pump seal)
- New axle seals (left and right)
- New drain plug and fill plug crush washers
- CVT-safe cooler line flush solvent
What your vehicle’s computers will need after the swap:
What’s involved: TCM Adaptive Relearn / Start Clutch Calibration
A professional bidirectional scan tool (such as Honda i-HDS or high-end equivalent) is required to perform the CVT Start Clutch Calibration and reset the CVT Fluid Deterioration monitor. Skipping this step causes harsh engagement, shuddering, or slipping.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque Converter Seating: Ensure the torque converter is fully seated (typically three distinct clicks/drops while rotating) before bolting to the engine to avoid cracking the internal oil pump.
- Subframe Alignment: Dropping the front subframe is required. Use subframe alignment pins during reinstallation to preserve steering and suspension geometry.
- Fluid Level Check Procedure: No dipstick is present. Check fluid level via the overflow check bolt on the side of the case with the vehicle level, engine running, and fluid temperature between 95°F and 113°F (35°C to 45°C).
- Axle Seal Damage: Avoid nicking the new axle seals with the axle shaft splines during insertion.
- NEVER Power Flush: Do not power flush the replacement transmission itself. Only flush the cooler lines and warmer.
Easy to get right once you know them:
- Ordering this transmission for a Hybrid model (which uses a completely different e-CVT system).
- Using incorrect or universal CVT fluid instead of Genuine Honda HCF-2 fluid.
- Skipping the TCM adaptive relearn/start clutch calibration after installation.
- Failing to flush the transmission cooler lines, which introduces old debris into the replacement unit.
- Misdiagnosing a weak 12V battery (which can throw false transmission codes) as a mechanical 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: Diagnose and repair externally; typically caused by a faulty pressure sensor or a sticking solenoid valve cover assembly.
🔎 Recommended at install: Change CVT fluid regularly every 30,000 miles to prevent fluid degradation and debris accumulation.
🔎 Recommended at install: Monitor fluid during early changes. Excessive metal indicates belt/pulley wear requiring inspection.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-11616-5029810). 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
2023-2026 Honda Accord 1.5L Turbo CVT: Problems, Identification, and Used Replacement
Learn how to identify the 6MM family M-CVT, diagnose common belt slippage and fluid pressure failures, and know exactly when to replace it with a quality used OEM transmission.
Read Full Guide →Related Trouble Codes (OBD-II)
8 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:
Honda: 062006MMA01RM, 20031-6MM-A01, 200316MMA01, 26000-6A7-305, 28100-6MM-A01
Fits Years: 2023 2024 2025 2026
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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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