GMB Corporation is an independent Japanese automotive parts manufacturer headquartered in Nara, Japan, founded in 1943 as a metal processing works. GMB supplies both OEM vehicle and parts makers and the global aftermarket, with production and sales bases across Asia, North America, Europe, and Oceania. It is especially well known for its water pumps, universal joints, and automatic transmission valve spools.
Engine coolant pumps where GMB makes all the key components in-house, including the bearing, impeller, mechanical seal, flange, and body, for tight quality control at the part level.
Brushless DC (BLDC) electric coolant pumps for hybrid, electric, and fuel-cell vehicles, ranging from compact 20 W units up to 1.3 kW designs.
Forged, carburized, and precision-ground spiders and bearing cups for drive shafts and propeller shafts, with seals and dust covers matched to hot- and cold-climate conditions.
Precision-machined spools that control fluid flow and pressure inside automatic transmissions (AT/CVT), including hybrid vehicle applications, produced at very high volume.
A range of over 1,000 tensioner and idler bearings, also supplied in complete timing belt kits for belt, tensioner, and idler replacement in a single job.
Silicone-oil fan clutches with a bimetal temperature sensor that vary fan speed to keep engine cooling balanced while reducing power loss and noise.
Mechanical water pumps, electric water pumps, and fan clutches for passenger cars, kei cars, heavy trucks, and industrial vehicles.
Timing belt tensioners, idler pulleys and bearings, and timing belt kits.
Automatic transmission valve spools for conventional and hybrid powertrains.
Universal joints and constant velocity (CV) joint components for drive shafts and propeller shafts.
Ball joints, tie rod ends, rack ends, and steering joints designed for smooth handling and long service life.
Wheel bearing components for vehicle axles.
Single-row ball bearings, water pump bearings, and clutch release bearings.
Control arms, stabilizer links, pitman and idler arms, and side rods for the aftermarket.
Replacement hub units supplied under the GMB brand in aftermarket channels.
Electric water pumps and CV joint components developed for electrified vehicles.
Custom design and fast development of parts to automaker and tier-supplier specifications.
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