Oil Cooler Kit for BMW 3 Series 335i (2006-2011) 3.0L

High-Efficiency 25-Row Oil Cooler Kit for 2006-2011 BMW 3 Series (E90/E92/E93)

What it Does: The Oil Cooler Kit replaces the undersized or missing factory heat exchanger on the 2006-2011 BMW 3 Series to lower operating oil temperatures, stabilize lubrication viscosity, and prevent limp mode during track sessions and aggressive driving.

The Stock BMW 3 Series Thermal Saturation Issues

The factory E90/E92 platform equipped with the twin-turbocharged N54 engine is notorious for rapid oil temperature spikes. Factory cooling configurations rely on a minimal liquid-to-air heat exchanger—or omitted auxiliary coolers on base models—causing sustained oil temperatures to easily exceed 250°F to 280°F under load. This intense thermal load shears motor oil viscosity, accelerates premature rod bearing and turbocharger thrust bearing wear, and triggers ECU-managed thermal limp-mode conditions that cut boost pressure and throttle response.

The Engineering Solution

This kit resolves thermal breakdown by integrating a robust 25-row aluminum bar-and-plate core engineered for high-pressure durability and rapid heat exchange with negligible oil pressure drop. Fluid routing is handled via a dedicated billet oil filter housing adapter and high-pressure braided oil lines equipped with leak-free AN fittings. A rigid, vented mounting bracket positions the core directly in the vehicle's frontal airstream, dramatically lowering oil temperatures and safeguarding tight internal engine clearances under sustained boost.

What's Included

• 25-row aluminum oil cooler core
• Billet oil filter adapter
• High-pressure oil lines and fittings
• Vented mounting bracket

Technical Specifications

Compatibility

• 2006-2011 BMW 335i Sedan (E90) - 3.0L N54
• 2006-2011 BMW 335i Touring / Wagon (E91) - 3.0L N54
• 2007-2010 BMW 335i Coupe (E92) - 3.0L N54
• 2007-2010 BMW 335i Convertible (E93) - 3.0L N54

Frequently Asked Questions & Fitment Warnings

Does this fit the E9x 3 Series?

Yes, this is a direct fit for the 2006-2011 BMW 3 Series equipped with the N54 3.0L twin-turbo engine; it does not fit naturally aspirated N52 models or later single-turbo N55 models.

Are extra parts required for Sedan and Wagon models?

Yes, E90 sedan and E91 wagon models require BMW fog light part number 63177158542 to provide adequate clearance for the cooler assembly.

The BMW Precision Standard

High-strung European turbo engines demand rigid thermal management. This direct-fit oil cooling solution ensures critical lubrication integrity under high thermal cycles without triggering CEL faults or dropping essential oil pressure.