E46Forum.co.uk • How to upgrade BMW E46 323i (M52TUB25) brakes to 330i specs?

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How to upgrade BMW E46 323i (M52TUB25) brakes to 330i specs?

Posted: Tue Oct 01, 2024 11:41 am

by spinecki

How to upgrade BMW E46 323i (M52TUB25) brakes to 330i specs?

Parts needed:

330i front brake calipers (part numbers: 34116750153 and 34116750154)
330i front brake rotors (325mm diameter)
330i brake pads
Stainless steel brake lines (optional)

Upgrade procedure:

Remove old brake components
Install new 330i calipers and carriers
Replace rotors with 330i spec (325mm)
Install new brake pads
Bleed brake system
Bed in new brakes properly

Additional considerations:

Ensure wheel fitment with larger brakes
Consider upgrading brake fluid to high-temperature variant
Adjust brake bias if necessary

Note: This upgrade significantly improves braking performance. Ensure all components are properly torqued and the system is bled correctly.