Product Description Rebuilt brake booster for the E9/E3/E12/Early E24 (Left-Hand-Drive models only). Due to the lack of cores for these brake boosters, we offer this listing as a rebuild service only on a core basis. Plastic elbow is NOT included, please keep yours in a safe place. Steps to order: -Place the order online. -Send us your core along with your contact information and order number. (1.5 week lead time) PLEASE remove the plastic “elbow” prior to shipment as this is liable to break during shipping. We also cannot guarantee that it will remain intact during rebuilding as old plastic can be very fragile. -We will be making an identification mark on your core to ensure that you get the same exact core you sent in returned to you. If you have any questions about this, please contact us. -We will inspect and rebuild your core booster (we will call if there are any issues) -We will ship your rebuilt booster to you.   NOTE: If the black plastic tube underneath the rubber bellows is cracked or broken your booster is not serviceable. This part is not replaceable. Make sure this part is protected well when shipping. WARRANTY CLAIMS: If after installing and using your rebuilt brake booster you find a fault with it, we are happy to have our rebuilder take a look at it to find the issue. We will arrange to have it sent back to us (US residents only). However, if there is contamination in the rebuilt booster after install with brake fluid, fuel, or any other liquids the warranty will be void.