Honda K Series Transmission Oil Guide Plate 21104-PPP-000

Honda K-Series Transmission Oil Guide Plate 21104-PPP-000

This is the genuine Honda oil guide plate that lives inside your K-series manual transmission and makes sure the parts that need oil actually get it. It's a small, unassuming piece, but its job is to route lubrication to the bearings and shafts that keep your gearbox alive, so a cracked or broken one is a real problem. This is the correct direct replacement, part number 21104-PPP-000.

What an Oil Guide Plate Does

A manual transmission lubricates itself mostly by splash. The gears at the bottom of the case dip into the oil pool and sling it up and around as they spin, which throws lubrication across the inside of the case. The trouble is that the components that need oil the most, the upper bearings and the needle bearings tucked inside the gears, sit high up and never touch that oil pool on their own. That's where the oil guide plate comes in. It catches the oil the spinning gears throw up and channels it exactly where it needs to go, feeding the upper bearings and directing oil into the shaft passages that lubricate the needle bearings under each gear. Without that guided flow, those parts would run dry, overheat, and start to fail, so the guide plate is quietly doing one of the most important jobs in the transmission.

Why a Good One Matters

These plates can crack, break, or work loose over time, and when that happens the oil they're supposed to be routing stops reaching the bearings it was feeding. A starved bearing doesn't last long, and what starts as a cheap plastic part failing can turn into a worn-out shaft or a spun bearing and a full rebuild. Replacing a damaged or missing guide plate with the genuine Honda piece restores the proper oil routing and gets your lubrication back where the factory intended it. Against the cost of the parts it protects, it's one of the cheapest pieces of insurance in the whole gearbox.

When to Replace It

Any time the transmission is apart is the time to check this plate and replace it if it's cracked, brittle, or broken. If you're in there for a rebuild, a bearing job, or a synchro refresh, dropping in a fresh guide plate while everything's open is cheap and easy. And if you've pulled a transmission apart and found debris or a spun bearing, inspect the guide plate closely, because a failed one is often the reason the lubrication came up short in the first place.

Fitment

Fits the K-series manual transmissions (K20A, K20Z, K24A, K24Z, K24W) in:

• 2013-2015 Acura ILX
• 2002-2006 Acura RSX Base and Type S
• 2004-2014 Acura TSX
• 2003-2017 Honda Accord (K-series)
• 2002-2015 Honda Civic Si
• 2002-2006 Honda CR-V
• 2003-2010 Honda Element
• 2016-2018 Honda HR-V