Denso 221-9291 Radiator

Denso Radiator for Audi and Porsche

The Denso 221-9291 radiator is an OE-style cooling replacement built for select Audi and Porsche applications. It is engineered to match factory radiator dimensions and cooling requirements, with a transmission oil cooler included for vehicles that use integrated fluid cooling.

Key Features

• Core height: 28.3500
• Core width: 19.4100
• Core thickness: 1.4200
• Inlet diameter: 1.5200
• Outlet diameter: 1.5200
• Transmission oil cooler included: yes
• OE-focused radiator configuration for proper fitment and cooling performance

Detailed Description

Denso part number 221-9291 is built to OE specifications for radiator configuration, tank design, fin pitch, core dimensions, and materials. Denso supplies radiators to original equipment manufacturers worldwide, and this radiator reflects that OE engineering approach with durability and function testing performed before release. It is a direct-fit cooling component for Audi Q5, Audi S4, Audi S5, Audi SQ5, Audi A4 Quattro, Audi A5 Quattro, and Porsche Macan applications listed in the fitment data. If you are replacing a worn or leaking radiator on an Audi Q5 or Audi S4, Denso 221-9291 provides the correct cooling-system architecture for the application.

This part cross-references APDI 8013278 for the same application.

What This Radiator Helps Address

• Engine overheating caused by a restricted or leaking radiator
• Coolant loss from cracked tanks or damaged core passages
• Transmission fluid temperature control on vehicles with an integrated cooler
• Cooling-system performance issues from aged OE radiator components
• Fitment problems from non-OE-style replacement radiators

Installation Notes and Tips

• Verify radiator dimensions, inlet and outlet size, and cooler connections before installation.
• Inspect hoses, clamps, and coolant condition during replacement to avoid repeat cooling-system issues.
• Flush the cooling system if contamination, sludge, or mixed coolant is present.
• Confirm vehicle-specific fitment for the exact Audi Q5, Audi S4, Audi S5, Audi SQ5, Audi A4 Quattro, Audi A5 Quattro, or Porsche Macan application before ordering.

Quality Assurance

Denso builds this radiator to meet OE manufacturer standards and subjects it to durability and function testing. That OE-based engineering helps support reliable cooling performance under demanding driving conditions.