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DO88 Performance Transmission Cooler

To Fit: 

  • BMW 2' M240i M240iX (G42) - Engine: B58 - 2022 on
  • BMW 3' 330e (G20 G21) - Engine: B48X - 2018 on
  • BMW 3' M340i M340iX (G20 G21) - Engine: B58 - 2018 on
  • BMW 4' M440i M440iX (G22 G23 G26) - Engine: B58 - 2021 on
  • BMW Z4 M40i (G29) - Engine: B58 - 2018 on

Upgrade your cars performance with the do88 Performance Transmission Cooler!


Designed specifically for BMW M340i/Z4 and Toyota GR Supra, the do88 Automatic Transmission Cooler ensures smooth and efficient shifting. While the latest Supra / M340i / Z4 lacks the manual gearbox, the swift ZF 8HP transmission coupled with the B58 compensates impressively. Yet, like all sports cars, heat remains a significant challenge, especially in tuned cars that generate more heat during rigorous street, track, or drag strip driving.

Our solution

The 2019+ BMW M340i/Z4 and GR Supra models come with an external liquid-to-air transmission cooler. However, for tuned cars, the generated heat can often exceed the OE cooler's capacity. Recognising this, our engineers redesigned the transmission cooler's core, increasing its volume by 184% and the cooling surface area by 176% while maintaining similar fluid pressures. We upgraded the tubes with harmonica tubes with internal channels, ensuring optimal cooling efficiency. Whether you're spending a day on the track or enjoying a drive through the back roads, the do88 Transmission Cooler helps keeping the temperatures in check.


Installing the much larger do88 Performance Transmission Cooler is hassle-free, requiring no modifications (see installation instructions).

Key Features:

  • Core volume increased by 184% and the active cooling area by 176% compared to the original cooler (OE).
  • Harmonica tubes ensure optimal oil flow and maximum surface area contact.
  • Compatible with the do88 Front Intercooler Radiator (WC-400).
  • OEM-style “Quick Connect” inlet/outlet connections.
  • Drop-in fit, eliminating the need for modifications.

Click here to view fitting instructions.

Do take care of your engine - choose do88!

Equivalent OE part numbers: 17219494828, 32910-WAA02 (for cross reference only)

do88 product references: DO88OC-190, OC190, DO88-OC-190

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PFS Parts Ltd.
Unit 8 - Saxon Court,
Bradfield Close,
Finedon Road Ind. Est,
NN8 4RQ,
United Kingdom
Tel: +44 (0)333 577 9961Calls to 03 numbers cost no more than a national rate call to an 01 or 02 number and must count towards any inclusive minutes in the same way as 01 and 02 calls. These rules apply to calls from any type of line including mobile, BT, other fixed line or payphone. During business hours emails are responded to promptly at no cost. Further details regarding 03 numbers available here.


Fax: +44 (0)844 800 2740

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PFS Parts Ltd. is a specialist parts company established in 2003. PFS Parts began as a Saab & Volvo parts supplier, but now also offers parts for other marques, as well as offering performance parts for many models via the DO88 perormance product range from Sweden. Click for more about PFS Parts...

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