CriticalCommonTransmission

Honda Accord: J30A V6 5-Speed Auto Transmission Failure

J30A V6 5-Speed Auto Transmission Failure is a common transmission fault on the Honda Accord on the 2003–2007 cars, and we rate it critical. Putting it right costs $2,800 to $6,500 at New Zealand independent workshop rates. Below is what goes wrong, the symptoms to notice on a test drive, where to look, and what to ask the seller before you hand over any money. It is one of 55 documented faults on the Honda Accord.

Vehicle: Honda Accord
Engine: J30A
Years: 2003–2007
Fuel: petrol
Gearbox: auto
System: Transmission

This page covers the Honda Accord as a model. Some faults only affect particular engines or build years — enter a plate below to narrow the list to one car.

All Honda Accord faults55 documented faults on this model

What you are looking at

No photograph available

We do not hold a verified photograph of the Torque converter or Clutch yet. We would rather show none than show a picture of a different part.

What goes wrong

The 5-speed automatic transmission (BAYA/MGHA unit) paired with the J30A 3.0 V6 is a documented failure point on CM/CN Accords. Third-clutch pack wear causes delayed engagement, shudder under light throttle, and eventually full third-gear loss. Honda acknowledged the issue in several markets via extended warranty coverage and issued TSB 05-048 addressing torque converter shudder. At higher mileages the failure becomes total, leaving the vehicle immobile.

What you would notice

Shudder or vibration between 60–90 km/h under light throttle
Delayed or harsh engagement when shifting into Drive or Reverse
Third-gear slip or flare under acceleration
Transmission warning light or D4 indicator flashing

How to check it

Where to look. Transmission — centre of vehicle beneath engine bay

With engine warm, perform a fluid condition check — burnt smell or dark brown ATF confirms clutch pack debris.
Test drive specifically between 60–90 km/h holding light throttle for torque converter shudder.
Check for fault codes P0730–P0736 (incorrect gear ratio) and P0740 (torque converter clutch).
Inspect the transmission pan for metallic debris.

Parts involved: Torque converter, Clutch.

What it costs to put right

$2,800 to $6,500 at New Zealand independent workshop rates. That is for this job on its own, not for the car.

An estimate, in NZD, for the repair as normally carried out. What a specific car costs depends on which part has failed and what it damaged on the way — treat this as the floor for a negotiation, not a quote.

Ask the seller

“Has the transmission ever been rebuilt or replaced, and do you have receipts?”
“Has the ATF been serviced, and if so how recently?”
“Does the car shudder or hesitate when cruising between 60 and 90 km/h?”

Now check the Honda Accord you are actually looking at

Everything above is true of the model, and it is free. What it does not tell you is whether THIS car has been looked after: its odometer history and whether the reading has ever gone backwards, whether there is still money owing on it, whether it has been reported stolen, how many owners it has had and what it is really worth today. That comes from the official records for that plate. Enter the plate for the free details, or get the full history and a market valuation from $13.49.

Not sure what you would be paying for? See what a full KickTyres check includes.

Where this comes from

The failure described above is documented in published sources — owner forums, technical service bulletins, recall notices and workshop write-ups — held in our fault database. The inspection instructions and the cost estimate are KickTyres’ own interpretation of them, and it is a starting point for an inspection rather than a manufacturer statement.

Honda Accord buyer questions

Is j30a v6 5-speed auto transmission failure serious on a Honda Accord?

We rate it critical and common on the Honda Accord. The 5-speed automatic transmission (BAYA/MGHA unit) paired with the J30A 3.0 V6 is a documented failure point on CM/CN Accords. Third-clutch pack wear causes delayed engagement, shudder under light throttle, and eventually full third-gear loss. Honda acknowledged the issue in several markets via extended warranty coverage and issued TSB 05-048 addressing torque converter shudder. At higher mileages the failure becomes total, leaving the vehicle immobile.

How much does it cost to fix on a Honda Accord?

$2,800 to $6,500 at New Zealand independent workshop rates. That figure is for this job on its own. A car showing the symptoms on this page is usually worth either walking away from or negotiating down by at least the repair figure.

Which Honda Accord years are affected?

Our research records this fault on the 2003–2007 Honda Accord. Build dates move around, especially on imported cars, so treat the range as the years to look hardest at rather than a guarantee either way. The official records tell you the exact build and first registration date for the car in front of you.

How do I check for it before I buy?

With engine warm, perform a fluid condition check — burnt smell or dark brown ATF confirms clutch pack debris. Test drive specifically between 60–90 km/h holding light throttle for torque converter shudder. Check for fault codes P0730–P0736 (incorrect gear ratio) and P0740 (torque converter clutch). Inspect the transmission pan for metallic debris. Look here: Transmission — centre of vehicle beneath engine bay