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Heating and Cooling› Radiators

Denso OEM

Radiator

$179.87 $157.61 Save $22.26

SKU: 221-3510

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Denso 221-3510 is a new OE quality radiator designed to meet rigid standards for proper engine cooling and function. DENSO's OE experience ensures unmatched performance, reliability, and fitment. Radiator configurations, tanks, fin pitch, core dimensions, and materials meet OE manufacturer's standards and pass strict durability and function tests, delivering reliable performance.
Show original supplier description
The Denso 221-3510 radiator is engineered to meet OE quality standards, ensuring optimal engine cooling and function for your vehicle. As a primary supplier to original equipment manufacturers, Denso leverages extensive experience to deliver unmatched performance, reliability, and precise fitment. This radiator features a core height of 14.8750 inches, a thickness of 0.6250 inches, and a width of 28.6870 inches. Both the inlet and outlet diameters are 1.2500 inches, and it includes a transmission oil cooler. This Denso radiator is designed as a direct replacement for the 2006-2008 Mazda 6 models equipped with an automatic transmission. Its construction, including core dimensions and materials, adheres to strict OE manufacturer specifications, ensuring it meets the same performance and durability benchmarks as the original part. Rigorous testing by Denso guarantees reliable operation even in demanding driving conditions. This specific radiator is part number 221-3510. Its interchange part numbers include APDI 8012673, CSF 2991, Mazda L3R1-15-200A, Spectra Premium CU2673, and others. It is crucial to verify fitment for your specific vehicle configuration, as this radiator is specifically noted for use with automatic transmission models.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandDenso OEM
Part Number221-3510
CategoryHeating and Cooling
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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