Performance M
Dinan High Capacity Engine Oil Cooler Upgrade Kit for BMW E90 335i / 335i xDrive AWD (335xi) N54 3 Series Sedan/Saloon 2009–2010 – Performance Oil Radiator Heat Exchanger for OEM Oil Cooler Cars, Track Day & Tuned Use
Dinan High Capacity Engine Oil Cooler Upgrade Kit for BMW E90 335i / 335i xDrive AWD (335xi) N54 3 Series Sedan/Saloon 2009–2010 – Performance Oil Radiator Heat Exchanger for OEM Oil Cooler Cars, Track Day & Tuned Use
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Serious oil temperature control for N54-powered E90 3 Series
Unlock dependable cooling performance for your twin turbo 3 Series with the Dinan High Capacity Oil Cooler System. Built for the 2009 to 2010 BMW E90 335i and 335i xDrive that left the factory with an OEM oil cooler, this upgraded heat exchanger delivers the extra thermal headroom your N54 needs on fast road drives and track days.
If your 3 Series is tuned, driven hard or regularly sees spirited B-road blasts, you know how quickly oil temps can climb. This direct-fit oil radiator upgrade stabilises temperatures, helps curb heat soak and reduces the chance of reduced power safe mode, giving you consistent performance, lap after lap and mile after mile.
What you will notice
- Lower, more stable oil temps during demanding use for improved engine protection
- Greater consistency on repeated pulls and during extended sessions
- A direct-fit, purpose-built solution for factory oil cooler cars that looks OE and works brilliantly
- Confidence to enjoy your tuning, intake and exhaust upgrades without the thermal compromises
Proven in our workshop
We have fitted this Dinan system on multiple customer builds and our own cars. Feedback has been consistently positive, with owners reporting cooler oil temps, stronger repeatability and far fewer temperature-related interruptions on road and at track days. It is one of the most sensible reliability upgrades for an N54-powered 335i.
Compatibility
- BMW 3 Series E90 335i saloon 2009 to 2010
- BMW 3 Series E90 335i xDrive AWD 2009 to 2010
- For vehicles originally equipped with the factory engine oil cooler
- Engine: N54 twin turbo straight six
Why it matters on an N54
The N54 is renowned for strong tuning potential but also for heat. More boost and more load mean more heat in the lubrication system. Upgrading the oil heat exchanger increases cooling capacity, helping safeguard bearings and turbochargers while keeping performance repeatable. It is a smart preventative step for any enthusiast who wants reliable power.
Installation
Professional fitting recommended. MJ Modifications offers in-house installation in Warwickshire. Request a quote or book workshop time at info@mjmodifications.co.uk.
Buy with confidence from MJ Modifications
We specialise in performance cooling and N54 upgrades, with hands-on experience across the E90 platform. Order today for fast dispatch and expert support before and after purchase.
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