Description
This rear main seal fits the Honda Acty Truck HA3, HA4 (1990-1999). It seals the back of the crankshaft where it meets the transmission so oil does not leak.
In Stock - ships from our California (USA) warehouse
Fast, reliable delivery - no overseas backorder wait.
Vehicle Fitment & Compatibility
Confirm your chassis code against the table below before ordering.
100% Fitment Guarantee
Not sure about fit? Add your chassis/VIN number at checkout and we confirm it before we ship. If a part does not fit your Acty, we exchange it or refund you in full.
Reasons to choose this rear main seal
- Oil leaking between the engine and transmission
- A drip that shows after the truck sits
- A hardened or worn old seal
- You have the transmission or flywheel off
Features & Function
- Seals the rear of the crankshaft
- Correct size for the E07A
- Stops the rear-main oil leak
Installation Specifications
- Difficulty: Advanced.
- Estimated time: best done with the transmission out.
- Required tools: A seal puller, a seal driver, and engine hand tools.
Oiwa Garage Tech Note
"This is the rear main seal. Reaching the rear main means separating the transmission, so do it during clutch work. Drive the seal square and lube the lip so it does not tear on the crank."
Frequently Asked Questions
How do I know the rear main seal is leaking?
Look for oil building up between the engine and transmission and a drip that shows after the truck sits. If the front seals are dry but you have a leak at the bellhousing, suspect the rear main.
Fitment verified by the Kei truck specialists at Oiwa Garage · Listing updated June 2026.