Problem with brake booster ATE

[325IS89]

Hello everyone,

I own a 1989 E30, 325i. I have a problem with my ATE T52 10-inch brake booster, OEN 34331157416.

Unfortunately, I have an internal leak in the vacuum system.

The part is no longer available new from car parts dealers.

My questions:

- Do you know if there are any parts from another car model that would fit without modification?

- Does anyone have a new part in stock?

- Has anyone ever had their brake booster serviced?

Thank you all and sorry for my English, this is a Deepl translation, I am French :)

[Dagamus(NM)]

Is the leak in the booster or another part of your vacuum system?

Seems available to me: https://www.pelicanparts.com/More_In...lI5QYpP9xFPMzP

Check the hoses around your throttle body and the big one to valve cover. If no obvious leaks there then it could be the booster.

Why is there a rag under the master cylinder and where is your reservoir?