AIRTEC BMW E90 E92 M3 Oil Cooler Upgrade

AIRTEC BMW E90 E92 M3 Oil Cooler Upgrade

  • 79% larger core
  • 17% increase in frontal area
  • Direct replacement for original
  • Reuses original oil line fittings
INSTRUCTIONS

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£490.00
£490.00
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AIRTEC BMW E90 E92 M3 Oil Cooler Upgrade

£490.00

AIRTEC's uprated oil cooler kit for the E90, E92 M3, is designed for both track and fast road use. Developed through extensive experience creating high-performance oil cooling solutions, this kit is a direct replacement for the factory cooler, engineered to make the most of the available space in the original location.

Featuring a 79% larger core and a 17% increase in frontal area compared to standard, the AIRTEC oil cooler provides a significant improvement in cooling efficiency and overall capacity. This allows the engine to maintain stable oil temperatures during sustained hard use, reducing the risk of heat-related performance loss.

The comprehensive kit reuses the original oil line fittings for a straightforward installation and includes new O-rings, replacement bolts, and a detailed fitting guide. Finished to AIRTEC’s high standards, this upgrade is an essential addition for any modified or track-focused E9x M3.

Please note: 2007 or early 2008 models will require the original oil line connectors to be modified OR replaced - see instructions above

  • 79% bigger than the standard BMW oil cooler
  • Increased frontal area of 17%
  • Reuses original oil line fittings
  • Oil cooler
  • 2x M8x12mm Socket Head Flange Bolts
  • 2x Replacement O-Rings
  • 2x 16mm Silicone Bungs
  • 2x 20mm Silicone Bungs

TESTED ON TRACK

In May 2025, we ventured over to the iconic Nürburgring in Germany to complete a two day, back-to-back test in order to collect data as part of the track testing programme for our newly developed E9x M3 cooling package; in particular the engine oil cooler DCT gearbox oil cooler. For this, we used our AIRTEC Motorsport demonstrator vehicle, which is equipped with an uprated exhaust system and sports cats, a remap, KW V3 suspension, AP Racing brakes and a semi-slick tyre set up, among other modifications and driven by this season’s Time Attack driver Alan Shepherd.

The first day would entail a day of data logging with the standard coolers in place, before swapping over to our AIRTEC Motorsport coolers for the next day and repeating the same process.

Using the original oil cooler on the first day of testing saw oil temperatures exceed the 125-degree mark on the oil temperature gauge in the car, reaching a peak of 135 degrees centigrade later in the day, forcing us to call the day short and make the decision to change the oil in the car due to concerns over the oil degrading purely as a result of the high temperatures.

The oil temperature reading shown on the dash is measured from the sump. When testing on the second day, the ambient temperature was one to two degrees hotter, allowing us to have near identical test conditions. The oil gauge on the dashboard never exceeded 120 degrees, allowing us to complete more laps without the worry of oil degrading.

When looking at the data gathered from the oil temperature sensors we had installed in the inlet and outlet of the oil cooler, we saw temperatures as high as 125 degrees at the inlet and as high as 110 degrees at the outlet, so only 15 degrees being taken out by the oil cooler. When compared to the data when fitted with our AIRTEC Motorsport oil cooler, the maximum temperature into the oil cooler was 123 and the maximum outlet temperature was 76 degrees, so 46 degrees of temperature pulled out of the oil, which is an impressive 205% more than the standard oil cooler was able to do.

On average, the temperature decrease by the AIRTEC Motorsport oil cooler was double that of the original oil cooler.