Transmission Assembly for 2010 Honda Accord
Product Notes Read before buying
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Vehicle Fitment Guide
This part fits the following vehicles:
| SubmodelSUB- MODEL |
Body Style | Years | Engine | Attributes |
|---|---|---|---|---|
| EX | Coupe | 2010 | V6 3.5L | FWD | Automatic |
| EX | Sedan | 2010 | V6 3.5L | FWD | Automatic |
| EX-L | Coupe | 2010 | V6 3.5L | FWD | Automatic |
| EX-L | Sedan | 2010 | V6 3.5L | 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:
- Verify the 4th, 5th, and 6th digits of the VIN are CS2 (Coupe V6) or CP3 (Sedan V6).
- Verify the transmission code on the barcode label on top of the transmission case is B97A, P79A, or M97A.
- Confirm the vehicle is Front-Wheel Drive (FWD).
What the install really takes — plan and budget with confidence:
Special tools this job needs:
- Engine support bar
- Subframe adapter/jack
- Torque wrench
- Professional-grade scan tool
Budget for these consumables at install:
- Honda Genuine ATF DW-1 (3.5 quarts for drain/fill, 7.9 quarts for dry fill)
- External inline transmission filter (OEM part number 25450-P4V-013 or equivalent)
- Torque converter hub seal
- Left and right CV axle shaft seals
- Transmission drain plug crush washer
- Transmission cooler line flush solvent
What your vehicle’s computers will need after the swap:
What’s involved: TCM/PCM Software Update and Shift Adaptive Relearn
Requires clearing the TCM adaptive memory and performing a shift adaptive relearn. While a professional scan tool (Honda i-HDS) is highly recommended to verify recall software updates, many report success with a manual drive cycle relearn.
Pro tips for a smooth first start-up — hand them to whoever does the install:
- Torque converter must be fully seated (three distinct clicks/drops) before bolting to the engine to prevent cracking the front pump gear.
- Front subframe must be perfectly aligned upon reinstallation to prevent steering and suspension issues.
- Be extremely careful not to nick the rubber lips of the new axle seals when reinstalling CV axles.
- A complete flush of the transmission cooler lines and radiator heat exchanger is mandatory to clear out debris from the failed unit.
Easy to get right once you know them:
- Using generic multi-vehicle ATF instead of Honda Genuine ATF DW-1.
- Skipping the TCM software check/update for the secondary shaft bearing recall.
- Attempting to reuse the old, contaminated torque converter.
- Reusing old axle seals, leading to immediate fluid leaks.
- Failing to perform a thorough cooler line flush, circulating old debris into the new unit.
- Improperly seating the torque converter and cracking the internal oil pump during installation.
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: Update the transmission control module (TCM) software to ease transitions between gears and prevent bearing damage.
🔎 Recommended at install: Perform software update and mandatory triple-flush procedure using Honda ATF DW-1. Replace torque converter if judder persists.
🔎 Recommended at install: Install an aftermarket VCM disabler (such as S-VCM) to keep the engine running on all six cylinders.
Researched from factory recalls, TSBs and OEM service data (reference unit 400-51553-2045161). 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
2010 Honda Accord 3.5L V6 H5 Transmission: Problems, Identification, and Used Replacement
Identifying the B97A, P79A, and M97A 5-speed automatic, common torque converter and bearing failures, and what to know before installing a used OEM replacement unit.
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: 20021R97020
Fits Years: 2010
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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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