The CSF 8221 is a high-performance ZF8 automatic transmission oil cooler for the 2021-2025 BMW G8X M3 and M4 (all trims, including Competition, Competition xDrive, CS, and CSL) and the 2023-2025 G87 M2 with the S58 engine and the ZF8 automatic. It is a dual-core, dual-pass design using two stacked 22mm 9-channel microtube cores for 44mm total thickness versus the OEM 28mm, with a 16-row front cooler and a 16-row rear cooler versus the OEM 14, giving a 194 percent increase in volume (1700ml versus the OEM 875ml). It is a drop-in fit with OEM-style quick-connect inlet and outlet and a replaceable rock guard, and it pairs with the OEM cooling system or the CSF 8215 heat exchanger.
- Type: dual-core, dual-pass ZF8 automatic transmission oil cooler
- Core: two stacked 22mm 9-channel microtube (44mm total, OEM 28mm)
- Rows: 16 front + 16 rear (OEM 14 rear)
- Volume: 194 percent more (1700ml vs OEM 875ml)
- Engine/trans: S58 twin-turbo 3.0L, ZF8 automatic
- Included: replaceable rock guard; pairs with CSF 8215 heat exchanger
- Fitment: drop-in, OEM-style quick-connect
- Part number: 8221
Vehicle Applications
Direct fit on the following (S58, ZF8 automatic):
- 2021 BMW M3 (G80/G81)
- 2022 BMW M3 (G80/G81)
- 2023 BMW M3 (G80/G81)
- 2024 BMW M3 (G80/G81)
- 2025 BMW M3 (G80/G81)
- 2021 BMW M4 (G82/G83)
- 2022 BMW M4 (G82/G83)
- 2023 BMW M4 (G82/G83)
- 2024 BMW M4 (G82/G83)
- 2025 BMW M4 (G82/G83)
- 2023 BMW M2 (G87)
- 2024 BMW M2 (G87)
- 2025 BMW M2 (G87)
FAQ
What vehicles does the CSF 8221 fit?
The 2021-2025 BMW G8X M3 and M4 (all trims) and the 2023-2025 M2, with the S58 engine and ZF8 automatic transmission.
How much more capacity does it have?
A 194 percent increase in volume, 1700ml versus the OEM 875ml.
How is the core built?
Two stacked 22mm 9-channel microtube cores for 44mm total thickness, dual-pass.
Is it a drop-in fit?
Yes. It uses OEM-style quick-connect inlet and outlet and includes a replaceable rock guard.
