• Rebuild & Upgrade Service for your 1996-2002 BMW E36 Z3 Convertible Hydraulic Cylinder. P/N 54 34 8 410 307

• You remove your cylinder you would like to have rebuilt, and send it to us, or order from our inventory with Core Exchange for fastest service.

• 2002-2008 Z4 | BMW convertible hinge cylinder and hydro unit rebuild & upgrade service.

• Our Core Exchange option makes this as easy as buying a pair of new cylinders - you only have to ship back your old cylinders afterwards for core credit. Top Hydraulics' also rebuilds and upgrades convertible hydraulic pumps, and we also manufacture our own upgraded hydraulic lines.

• Owning and driving a convertible with an automatic top is prestigious, convenient and exciting - let Top Hydraulics help you enjoy your beautiful car even more by making your convertible top system truly better than new!

• Top Hydraulics' standard warranty is 3 years on rebuilds/upgrades of convertible top cylinders and hydraulic pumps, and on new hydraulic hoses.

• Rebuild & Upgrade Service for your 2007-2014 BMW E88 1-Series Convertible Hydraulic components.

• Our Core Exchange option makes this as easy as buying a new part - you only have to ship back your old parts(s) afterwards for core credit. Top Hydraulics' also rebuilds and upgrades convertible hydraulic pumps, and we also manufacture our own upgraded hydraulic lines.

• You may also choose to remove the parts you would like to have rebuilt, and send them to us. 

• 2000 - 2006 | BMW E46 chassis (318ci, 320ci, 323ci, 325ci, 330ci, M3)

• Rebuild & upgrade service for all hydraulic cylinders and the hydro unit (aka convertible top hydraulic pump) in your E46, 3xxci Series BMW.

• On the cylinders, Top Hydraulics replaces the decaying seals with a far superior material, making your cylinder better than new.

• The BMW E46 (3xxCI or M3) has six hydraulic cylinders: two main lift cylinders, two bow tension cylinders, and two tonneau cover cylinders. All these cylinders have seals that will eventually fail, unless your car gets wrecked prematurely.

• Please note: leaks from the bow tension cylinders will drip onto the tonneau cover (aka storage compartment cover) and permanently damage the vinyl. It is best to have all six cylinders upgraded at the same time. If you budget does not allow this, please upgrade the cylinders at least in pairs.

• Top Hydraulics also rebuilds the hydro units (aka hydraulic pumps) and control modules (aka hydraulic valve blocks), and Top Hydraulics manufactures replacement hydraulic lines.  Please prepay your order and include the receipt with your shipment for fastest turn around time.

• Standard return shipping method in the US is USPS Priority Mail for $10 per order.

• Please see removal instructions for all cylinders and the most frequently failing hydraulic lines in our DIY section

Rebuild/Upgrade Service for your 5-Series BMW (E61) hydraulic liftgate components. 525xi, 528xi, 530xi, 535xi, 525xd and 530xd

BMW 6-Series (F12) from 2011-2018. 640i, 650i, M6.

Rebuild/Upgrade Service for your 2003-2010 6-Series BMW E63/E64 convertible hydraulic components. 645ci, 650i, and M6

Rebuild/Upgrade Service for your 7-Series BMW E65/E66 hydraulic liftgate components. 745i, 745Li, 750i, 750Li, 760Li