Dinan High-Capacity Oil Cooler / Oil Radiator Upgrade for BMW E90 3 Series 335i N54 (Sedan/Saloon) & 335i xDrive/335xi | Performance Auxiliary Oil Heat Exchanger Kit | Direct-Fit for Factory Oil Cooler, Standard Front Bumper

Dinan high capacity oil cooling system for BMW E90 335i and 335i xDrive - standard front bumper, cars with factory oil cooler

Keep oil temperatures under control on your N54 twin turbo E90 with the Dinan enlarged oil radiator package. This uprated engine oil cooling kit is a proven solution for spirited road driving, tuned builds and track days, delivering consistent lubrication, dependable performance and confidence lap after lap. If you have an E90 3 Series 335i or 335i xDrive saloon that came with the original equipment oil cooler and a standard bumper, this is the direct fit upgrade you want.

Why it works

The Dinan assembly offers roughly twice the fluid volume of the stock heat exchanger along with a huge jump in cooling tube area - 414 sq in compared to 112.5 sq in. Integrated inlet ducting improves airflow efficiency and a larger exit to the wheel arch promotes better evacuation. Lightweight convoluted PTFE lines with a polyester outer braid and motorsport grade fittings finish the package for a robust, leak resistant install in the factory location.

Benefits you will feel

• Lower oil temps for the N54 3.0 twin turbo engine on fast road and track
• Helps fight heat soak and reduces the chance of power reduction or limp mode
• More stable viscosity and protection for bearings, turbos and internals
• OE style fit and finish - mounts where the original oil cooler sits
• Built for reliability with PTFE hose and quality fittings

Tech highlights

• Approx 2x the volume of the OE oil heat exchanger
• 414 sq in cooling tube area vs 112.5 sq in stock
• Integrated inlet ducting for optimised airflow
• Enlarged outlet to the wheel well for improved ventilation
• Convoluted PTFE hoses with polyester outer braid and race quality fittings
• Direct fit on vehicles that originally have the factory oil cooler and a standard front bumper

Real world results

We have installed and run this Dinan oil cooling kit on customer cars and our own builds. Feedback has been excellent, with owners praising stable temperatures on long pulls, B road blasts and repeated hot laps. If you want a bolt on, no drama solution for BMW 335i oil temperature control, this is it.

Vehicle compatibility

BMW 3 Series E90 335i and 335i xDrive saloon - for cars equipped from factory with an OE oil cooler and a standard front bumper. If you are unsure about compatibility, contact us and we will help confirm before ordering.

Professional fitting

Installation available at MJ Modifications in Warwickshire. For a fitting quote or advice, email info@mjmodifications.co.uk.

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