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do88 Engine Oil Cooler - BMW M3 / M3 CSL (E46) 2000-2006

do88 SKU: DOBOC-150
Price
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The do88 engine oil cooler is a bolt-in replacement for the factory unit on the E46 BMW M3 and M3 CSL, built to control S54B32 oil temperatures during track and endurance driving. Core volume is 185% larger at 3276 cm3 versus the OEM 1148 cm3, active cooling area grows 50% to 575 cm2 from 383 cm2, and the cooler holds 0.70 liters of oil against 0.39 liters stock. CNC-machined connections and brackets let it mount to the OEM oil lines with no modification, and installation instructions are included.

Specifications

Type Engine oil cooler
Position Engine oil circuit
Core Volume 3276 cm3 (vs 1148 cm3 OEM, +185%)
Cooling Area 575 cm2 (vs 383 cm2 OEM, +50%)
Oil Capacity 0.70 L (vs 0.39 L OEM)
Installation Drop-in; uses OE lines and brackets
Part Number OC-150

This part fits:

Year Make Model Submodel
2000-2006 BMW M3 S54B32 (E46)
2003-2004 BMW M3 CSL S54B32 (E46)

Shipping

  • In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
  • Standard, expedited, and overnight options at checkout.
  • Oversized items ship by freight and take longer.
  • Backordered items ship as soon as stock lands — contact us for lead times.
  • International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

  • 30-day returns on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
  • Installed or used parts can’t be returned — confirm fitment before you install.
  • Special orders and custom items are final sale.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Refund Policy
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