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BMW E9X M3 / 335i Race-Spec Transmission/Oil Cooler

BMW E9X M3 / 335i Race-Spec Transmission/Oil Cooler

€602,95

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The engineers at CSF know cooling. So when it comes to keeping your transmission temps down as you push your M3 / 335i hard on the street or track, the CSF Trans/Oil Cooler is the obvious choice. With an increase in cooling efficiency of around 30%, you can drive with confidence knowing you won't be damaging your expensive transmission due to overheating.

Features

  • Made with CSF's AC Condenser Technology Using a 1-Row Super-High Pressure 22mm Wide 11-Channel Microtube
  • Dual-Pass High-Performance Core with 11 Cooling Tubes vs. OEM 10 Tube Design
  • High-Density Multi-Louvered Fin Design with 20% More Surface Area Contact Compared to OEM Unit
  • "Drop-in Fit" Requiring No Modifications to Install - Accepts All Attaching OEM Components Including Oil-Line Connections, Mounting Brackets and Shroud/Ducting
  • Lab Tested at approximately 30% More Efficient than OEM Cooler
  • World's 1st True "Plug-And-Play" Transmission Cooler for The E9X M3 Platform
  • Replaces OEM Part Number: 17227521376

Applications

  • 2007-2011 BMW E90 335i - Turbocharged 3.0L L6
  • 2007-2013 BMW E92 335i - Turbocharged 3.0L L6
  • 2007-2013 BMW E93 335i - Turbocharged 3.0L L6
  • 2009-2011 BMW E90 335i xDrive - Turbocharged 3.0L L6
  • 2009-2013 BMW E92 335i xDrive - Turbocharged 3.0L L6
  • 2011-2013 BMW E92 335is - Turbocharged 3.0L L6
  • 2011-2013 BMW E93 335is - Turbocharged 3.0L L6
  • 2007-2008 BMW E90 335xi - Turbocharged 3.0L L6
  • 2008 BMW E92 335xi - Turbocharged 3.0L L6
  • 2008-2012 BMW E90 M3 - 4.0L V8
  • 2008-2013 BMW E92 M3 - 4.0L V8
  • 2008-2013 BMW E93 M3 - 4.0L V8
  • 2013-2015 BMW E84 X1 xDrive35i - Turbocharged 3.0L L6

OEM Part Numbers

  • BMW: 17 22 7 521 376
  • BMW: 17-22-7-521-376
  • BMW: 17227521376
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⚠️ DISCLAIMER Unless explicitly stated otherwise, all products sold by DC Prestige Online LTD are designated race-only and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may be in violation of local, state, and Federal laws. DC Prestige Online LTD does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer. Read our full terms of service here.

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Although our products may display an “In Stock” status, this indicator does not always reflect real-time inventory. Stock levels can change quickly, and some items may require additional processing time.

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Last updated: 07/09/2025

We want you to be confident when shopping with us. This page explains your rights and our terms for deliveries, returns, refunds, exchanges, and digital products. It applies to UK and international customers.

1. Standard Returns (UK & International)

  • Notify us within 14 calendar days of receiving your order if you wish to return.
  • Once approved, you have a further 14 days to send the goods back.
  • Items must be unused, uninstalled, and in original packaging, with proof of purchase.
  • Refunds are processed to your original payment method within 14 days of receiving goods (or proof of postage).

Note: Standard delivery costs will be refunded; upgraded shipping (e.g., next-day) is non-refundable. You are responsible for return postage unless the item is faulty, damaged, or incorrect. Used, installed, or damaged goods beyond reasonable inspection may incur up to 50% deduction from the refund.

2. Special Order & Custom Goods

  • Special-order parts must be returned within 7 days (if non-faulty) and may incur up to a 50% restocking fee, depending on supplier terms.
  • Custom-made or made-to-order goods are non-returnable unless faulty or not as described.
  • Faulty or incorrect items may be returned within 30 days for refund, repair, or replacement.
  • Customers are responsible for providing accurate specifications; we are not liable for errors due to incorrect information.

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  • If your order arrives damaged, faulty, or incorrect:
  • Contact us immediately with clear photos of the product and packaging.
  • We will cover return shipping costs and issue a refund, repair, or replacement.
  • If a parcel arrives visibly damaged, sign as “damaged” (if possible) and notify us straight away.

4. Non-Returnable Items

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5. Exchanges

  • To exchange an item, return it via the standard process and place a new order for the replacement.
  • Customers are responsible for return and new delivery costs.
  • If the exchange is due to a faulty or incorrect item, we will cover return shipping and send the replacement free of charge.

6. Installation at D&C Prestige

  • Cancellations or changes made less than 48 hours before your installation appointment will forfeit your fitting deposit.
  • If you cancel and request a product refund, a 15% restocking fee applies, along with the deposit fee (if applicable).

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  • Tracking information will be provided once the order is shipped.
  • International customers are responsible for customs duties, taxes, and import fees unless the item is faulty or incorrect.
  • Refunds for international returns are issued in GBP. Currency conversion fees, bank charges, and international transaction costs are the customer’s responsibility.
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For full details, see our Shipping Policy.

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  • Digital content (e.g., Bootmod3, XHP) is typically delivered immediately or within 24 hours via email or account access.
  • By purchasing, you agree that delivery is deemed to have started once payment is made, and you waive your right to cancel under the 14-day cooling-off period allowed by UK law.
  • Refunds are only provided if the product is faulty, inaccessible due to our error, or not as described.
  • You are responsible for ensuring compatibility with your vehicle, hardware, or software; refunds are not offered if supplied correctly but incompatible due to buyer error.
  • International customers agree to the same terms.

9. How to Start a Return

  1. Visit our Contact Page and provide your full name, order number, and reason for return.
  2. Wait for return authorisation and instructions before sending your item.
  3. Once received and inspected, we’ll notify you of approval or rejection of your refund.

Proof of return: Customers must retain proof of postage for all returns. Tracked and insured services are strongly recommended.

Refund method: Refunds are issued only to the original payment method used for the purchase. We cannot refund to alternative cards, accounts, or payment services.

Refused or undeliverable parcels: If a delivery is refused, unclaimed, or undeliverable due to incorrect address details provided, the customer will be responsible for return shipping costs and any applicable restocking fees.

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BMW E9X M3 / 335i Race-Spec Transmission/Oil Cooler