Honda B/C/D/F/H/K/L/R Series Manual Transmission Magnet

Honda Manual Transmission Magnet - B/C/D/F/G/H Series & K/L/R Series

This is the genuine Honda magnet that lives inside your manual transmission and quietly protects it. As your gearbox runs, its steel parts shed tiny metal particles, and this magnet is what catches them before they can do any harm. It's one of the cheapest parts in the entire transmission and one of the easiest to overlook, which is exactly why it's worth replacing with a fresh one when you're in there. This page covers two part numbers, so you pick the one that matches your transmission family.

What the Magnet Actually Does

Every manual transmission wears as it works. The gears mesh, the bearings spin, and the shafts load up, and all of that normal operation sheds microscopic steel particles into the gear oil. Those particles are ferrous, meaning magnetic, and if nothing collects them they just circulate around in the oil, grinding away at the very bearings and gear teeth they came from and accelerating wear. The transmission magnet is the fix. It sits inside the case and acts as a passive filter, pulling those steel particles out of circulation and holding them so they can't keep doing damage. It's a simple part with a genuinely important job: keeping your gear oil clean so the expensive parts last.

Why a Fresh One Is Worth It

A magnet that's cracked, weak, or already caked with years of debris isn't catching new particles the way it should, so swapping in a fresh one restores the full protection. Clean oil means less abrasion on the internals, and less abrasion means a transmission that lasts longer, which is the whole point. There's a diagnostic benefit too. When you pull the old magnet, what's stuck to it tells you something: a light fuzz of fine particles is normal wear and nothing to worry about, while shiny flakes or heavy chunks are a sign something inside is wearing abnormally and deserves a closer look. Be clear on the limitation, though, because the magnet only tells you that metal is present, not which part it came from. It's an early-warning flag, not a diagnosis.

When to Replace It

The easiest time to do this is any time the transmission is already open or drained. A gear oil change, a clutch job, or any transmission service is the moment to pull the old magnet, see what it caught, and drop in a fresh one. Given how cheap it is compared to everything it's protecting, replacing it rather than reusing a tired one is about the best value maintenance you can do on a Honda or Acura gearbox.

Choose Your Transmission Family

Pick the version that matches your drivetrain:

• B / C / D / F / G / H Series (21120-PG2-003): the older Honda and Acura manual transmissions behind the B, C, D, F, G, and H-series engines.
• K / L / R Series (21120-PWL-000): the later manual transmissions behind the K, L, and R-series engines.

Fitment

B/C/D/F/G/H Series (21120-PG2-003):

• 1997-1999 Acura CL 2.3
• 1987-2001 Acura Integra
• 1986-1995 Acura Legend
• 1991-2005 Acura NSX
• 1992-1994 Acura Vigor
• 1982-2002 Honda Accord
• 1982-2000 Honda Civic
• 1998-2001 Honda CR-V
• 1984-1991 Honda CRX
• 1993-1997 Honda Del Sol
• 1982-2001 Honda Prelude
• 2000-2009 Honda S2000

K/L/R Series (21120-PWL-000):

• 2013-2015 Acura ILX
• 2002-2006 Acura RSX
• 2004-2014 Acura TSX
• 2003-2012 Honda Accord
• 2003-2015 Honda Civic Si
• 2006-2015 Honda Civic DX/EX/LX
• 2003-2006 Honda CR-V
• 2011-2016 Honda CR-Z
• 2003-2010 Honda Element
• 2007-2020 Honda Fit