Performance Koyo Radiator, Mazda 3, MPS, 2.3L Turbo, 09/13, 25mm, (KS062306)

Koyo Radiator KS062306 for 2009–2013 Mazda 3 BL MPS — Hyper KH-Series 25mm Core

The Koyo Radiator KS062306 is a high-performance upgrade engineered for 2009–2013 Mazda 3 BL MPS 2.3L Turbo models. Designed with Koyo’s Hyper KH-Series 25mm high-density core, this radiator enhances cooling efficiency while maintaining a compact, lightweight profile—ideal for Aotearoa’s demanding driving conditions.

Built in Japan with precision TIG welding, Nocolok brazing, and hand-crafted heliarc welds, this all-aluminium unit is a direct OE fit. It bolts right in using factory fan shrouds and hoses, making installation a breeze with no modifications required. Whether you're commuting through Wellington traffic or chasing curves on South Island roads, this radiator is built to keep your MPS cool under pressure.

Note: Automatic transmission models require a Davies Craig DC-677 external transmission cooler. Hyper Cap sold separately.

Features & Benefits

• 25mm Hyper KH high-density core maximises cooling while minimising space

• Nocolok brazed construction resists vibration, corrosion, and road debris

• Billet filler neck for leak-proof sealing under high performance use

• OE mounting design allows for hassle-free installation with factory components

• Hand-crafted heliarc welds ensure lasting durability and strength

• Lightweight aluminium body adds performance without bulk

Made for Kiwi Drivers

From spirited drives through Taranaki’s tight backroads to navigating Auckland’s summer traffic, the Koyo KS062306 radiator is a trusted companion for any Mazda 3 MPS owner wanting performance cooling that’s built for life in Aotearoa.

Technical Specifications

Vehicle Compatibility

What's Included

• 1 × Koyo Radiator KS062306 (25mm Hyper KH-Series core)

• 1 × Pre-installed drain plug

• OE-fit mounting points for hoses and fan shrouds

• Installation-ready packaging

• Product and warranty documentation

REVIEWS

BL
Installed this in my MPS last month—temps are way more stable now and install was smooth. Top-notch quality.

Ben L.
Palmerston North, NZ
★★★★★

SR
Chucked this in for my weekend turbo build. Solid welds, fits like OEM, and keeps things cool even when I’m pushing it.

Sophie R.
Nelson, NZ
★★★★★