Honda K20Z3/K24Z2/K24Z3 Rear Main Seal 91214-RZY-A01

Genuine Honda Rear Main Seal (91214-RZY-A01) - K20Z3, K24Z2 & K24Z3

If you've got an oil leak at the back of your engine, right where the block meets the transmission, the rear main seal is almost always the culprit. It's the seal that rides on the back of the crankshaft where it exits the block, and when it gets old and hardens, it starts weeping oil down the back of the motor and onto your bellhousing. This is the genuine Honda replacement (91214-RZY-A01) that fits the K20Z3, K24Z2, and K24Z3, so when you're already in there with the transmission out, you put the right seal back in and fix it for good.

Do It While The Transmission Is Out

Here's the honest reality of this part: the rear main seal sits behind the flywheel, so reaching it means the transmission and clutch have to come off. That's a big job, which is exactly why you don't want to do it twice. If you're already in there for a clutch, a flywheel, or any transmission work, replacing the rear main seal while you have access is smart, cheap insurance. It's a couple of dollars and a few extra minutes now versus pulling everything apart again in a year because the old seal finally let go. If you're chasing a leak, this is the seal to replace.

Why Genuine Honda Matters Here

This isn't a spot to gamble on a cheap aftermarket seal. The rear main lives in a demanding place, sealing a spinning crankshaft against oil pressure and heat, and access is miserable enough that you really want to get it right the first time. This is the exact seal Honda spec'd for these K-series engines, so it fits the bore correctly, rides on the crank the way it should, and seals properly without fighting you during install. When the job is this involved, correct and reliable beats cheap every time.

Fitment

This rear main seal (91214-RZY-A01) fits the K20Z3, K24Z2, and K24Z3 across these cars:

It also covers other applications sharing these engines, including swaps. If you're running a K20Z3, K24Z2, or K24Z3, this is the correct rear main seal for it. As always, confirm the part against your engine before ordering.

Who This Is For

This is for the owner tracking down an oil leak at the back of the engine, or anyone with the transmission already out for a clutch or flywheel job who's smart enough to refresh the rear main while they're in there. Old seals leak, and this one's a pain to reach, so replacing it at the right moment saves you a world of hassle. Grab it, seat it properly, and put that leak behind you.

Fits: Honda K20Z3, K24Z2, and K24Z3, see the table above for models and years, plus swaps. Part number: 91214-RZY-A01. Type: genuine Honda rear main seal (crankshaft, transmission side). Best done: with the transmission and flywheel removed. Sold: individually.