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Radiator, Main (OEM) for B6-B7 S4 with Automatic Transmission

SKU: OEM-8E0121251AJ
ATTENTION B6-S4 OWNERS: This is an OEM B7-S4 Radiator. We are now offering this Radiator for B6-S4 owners since we have successfully adapted it to the B6-S4 with only minor tweaks AND it sells for less than half the price of the OEM B6-S4 radiator!!! Once again, JHM offers S4 owners a low cost, OEM replacement solution for their cars. Save over 50% by buying the OEM B7-S4 Radiator for your B6-S4!!!

This is an OEM Main Radiator for your Automatic Transmission B6-B7 S4. This is the central radiator that sits in the middle of the bumper. This is the same radiator that came on the B7-S4 from the factory. The OEM Part Number is 8E0121251AJ or 8E0 121 251 AJ.


The main difference between the B7-S4 Radiator and the B6-S4 Radiator is that the B7-S4 Radiator has a larger driver's side end tank and no relief for the B6-S4 style AC System High Pressure Switch. Additionally, the driver side end tank isn't as smooth on the back side of the tank which means that it doesn't completely close up the seal on the stock B7-S4 core support. After testing this setup for several thousand miles in different conditions, we have yet to see any adverse cooling issues from this.

There are only two minor tweaks you need to make to the parts on your B6-S4 to allow OEM B7-S4 Radiator work on your car. Please note that while the tweaks made to fit the OEM B7-S4 Radiator to your B6-S4 are minor, they are done at your own risk.
1) Bend the AC High Pressure Switch outward towards the front of the car. The AC High Pressure Switch is located on the driver side of the AC Condenser and will need to be moved to clear the larger B7-S4 Radiator drive side end tank.
2) Cut a relief or install a rubber spacer (about 3 inches long) on the driver's side hood stop bracket to keep it from rubbing in the ribs located on the B7-S4 Radiator's driver's side end tank.

Download the ZIP file located HERE to see pictures of these tweaks on our shop installation.

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This product fits the following vehicles:
Make Model Chassis Engine
Audi S4 B6 (2003-2005) 4.2l V8 40v
Audi S4 B7 (2005.5-2009) 4.2l V8 40v
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Off-road Use

By Purchasing any Off-Road use ONLY products from JH Motorsports, Inc. I acknowledge and understand the following disclosure. (This notice is located at the bottom of the page description of affected products on our website.)

Vehicle Code § 27156:
(b) No person shall operate or leave standing upon a highway a motor vehicle that is required to be equipped with a motor vehicle pollution control device under Part 5 (commencing with Section 43000) of Division 26 of the Health and Safety Code or any other certified motor vehicle pollution control device required by any other state law or any rule or regulation adopted pursuant to that law, or required to be equipped with a motor vehicle pollution control device pursuant to the National Emission Standards Act (42 U.S.C. Secs. 7521 to 7550, inclusive) and the standards and regulations adopted pursuant to that federal act, unless the motor vehicle is equipped with the required motor vehicle pollution control device that is correctly installed and in operating condition. No person shall disconnect, modify, or alter any such required device.
(c) No person shall install, sell, offer for sale, or advertise any device, apparatus, or mechanism intended for use with, or as a part of, a required motor vehicle pollution control device or system that alters or modifies the original design or performance of the motor vehicle pollution control device or system.

Health and Safety Code § 43000:
43001. The provisions of this part shall not apply to:
(a) Racing vehicles.

As the aforementioned code sections outline, it is against the law to operate or use a vehicle on public streets or highways with modified, altered, or disconnected motor vehicle pollution control devices. This may include but is not limited to, Evaporative Fuel Controls, Catalysts, DPF, PTOX, PCV Systems, Exhaust Gas Recirculation Systems, Oxygen Sensors, Thermostatic Air Cleaners, Air Intake Systems, Fuel Injectors, Regulators, Adjustable Cam Gears, ECU Programming, Mapping, or other Computer Modifications. Air Pumps, Air Injection, Timing, and any other Emission System Modification(s).

Purchaser acknowledges and certifies to JH Motorsports Inc., that Purchasers vehicle will only be used for racing applications or off road vehicle use only. Purchaser requests these modifications for the purpose of enhancing the vehicle for competitive Racing Applications and will not use this vehicle on public streets or highways. Purchaser agrees to indemnify JH Motorsports Inc., all employees, officers, owners, and subsidiaries for any civil or criminal liability arising out of use of Purchasers vehicle on public streets or highways as Purchaser has been duly notified of the laws and regulations regarding disconnecting, alteration, or modification of a vehicle’s pollution control devices. Purchaser understands and has been advised the driving of a vehicle on public streets or highways could result in criminal or civil penalties.

Prop 65

Warning: This product may contain a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm.

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