

Package deal! Includes Rebuild/Upgrade of all 6 hydraulic cylinders and the hydraulic pump unit.
You send in your parts first and we will upgrade them to better than new condition, or choose the core exchange option and we ship from our inventory first.
No sales tax for orders in the USA
We provide world class technical support
3-year standard warranty (should last decades)
Hydraulic lines on some cylinders do not have quick disconnects and must remain attached (tonneau cover cylinders and right bow tension cylinder).
Main lift cylinders: p/n 54347025593 (left and right)
Bow Tension Cylinders: p/n 54347025599 (left side) and 54347025600 (right side)
Tonneau Cover Cylinders: p/n 54348236956 (right side) and 54348243269 (left side)
Hydraulic Pump Unit : p/n 54347025595
Slightly extended version of the OEM hose, which is not available from BMW. Only available from Top Hydraulics. This line is for the newer version bow tension cylinder on the left side, bottom fitting, where the lines are attached via a screwed on clamp.
Rebuild/Upgrade Service for Left Soft Top Lid Cylinder for BMW E88 1-Series.
Send in your part(s) first, or select "Order now with core exchange" to order from our inventory. Core exchange orders are subject to a $50 inventory surcharge as well as a $120 refundable core deposit.
Replaced and improved rod seals, piston seals, cap seals, gland seals, wipers, and port seals make these parts better than brand new ones, with an expected service life of 30-50 years under normal circumstances.
P/N: 54347190669
Rebuild/Upgrade Service for Left Main Lift Cylinder for BMW E88 1-Series.
Send in your part(s) first, or select "Order now with core exchange" to order from our inventory. Core exchange orders are subject to a $50 inventory surcharge as well as a $120 refundable core deposit.
Replaced and improved rod seals, piston seals, cap seals, gland seals, wipers, and port seals make these parts better than brand new ones, with an expected service life of 30-50 years under normal circumstances.
P/N: 54347190665
You send us your pump to be rebuilt and upgraded. Includes replacement of electric motor if needed, overhaul of valves and internal parts of the pump assembly to exceed manufacturer's specs, a full bench test for flow, pressure, and thermal behavior.
Expedited core exchange option is available and includes a $30 inventory surcharge + $150 core deposit.
BMW p/n 54348410305
840722402
HB70095-002
You send in your malfunctioning F33 4-Series hydro unit, and Top Hydraulics rebuilds it.
-OR-
Order from our inventory with core exchange (includes $50 inventory surcharge and $500 refundable deposit)
P/N: 54377344440
Includes electric motor replacement or rewinding if necessary, two new high-current relays, service of hydraulic valves and solenoids, and upgrade of internal seals in the pump to eliminate current or future pressure loss or internal bypass. Three years warranty!
Price listed is for rebuild/upgrade service for individual hydraulic hinges - send in your part first.
It is highly recommended to upgrade them in pairs. These hydraulic cylinders always fail almost simultaneously.
Send us your pump and Top Hydraulics will rebuild and upgrade it outlast and outperform brand new ones. Model years '07+.
P/N 54377128779
Rebuild/Upgrade Service for the full set of BMW E88 1-Series.
Send in your cylinders first, or select "Order now with core exchange" to order a set from our inventory. Core exchange orders are subject to a $200 inventory surcharge as well as a $600 refundable core deposit.
Replaced and improved rod seals, piston seals, cap seals, gland seals, wipers, and port seals make these parts better than brand new ones, with an expected service life of 30-50 years under normal circumstances.
Package deal!
You send in your cylinders first; we will upgrade them to better than new condition. Optional core exchange has an inventory management surcharge, plus a $600 deposit.
Includes two main drive cylinders, two bow tension cylinders, and two tonneau cover cylinders.
Rebuild/Upgrade Service for Right Main Lift Cylinder for BMW E88 1-Series.
Send in your part(s) first, or select "Order now with core exchange" to order from our inventory. Core exchange orders are subject to a $50 inventory surcharge as well as a $120 refundable core deposit.
Replaced and improved rod seals, piston seals, cap seals, gland seals, wipers, and port seals make these parts better than brand new ones, with an expected service life of 30-50 years under normal circumstances.
P/N: 54347190665
Special option: Core exchange. This means that you get a rebuilt & upgraded pump from Top Hydraulics' inventory first, then you ship back your original pump for credit of your $250 core refund. You get a pump that has been rebuilt to outlast and outperform brand new ones. Model years '07+.
P/N 54377128779
BMW part number 54348243269
Expedited Core Exchange Option where Top Hydraulics ships parts from our inventory first is $700 plus a $300 Refundable Core Charge.
These pumps have been rebuilt and upgraded. The electric motor has been replaced or rewound if necessary. A new high-current relay has been installed, and all hydraulic valves serviced. The internal seals in the pumps have been upgraded to eliminate current or future pressure loss or internal leak. Three years warranty.
P/N 54-34-7-421-753, aka 7310756, aka 541090, aka 54347421753
It is highly recommended to upgrade the bow tension cylinders in pairs. You send in your cylinder(s) first.
You send in your malfunctioning E46-Series hydro unit, and Top Hydraulics rebuilds it. The rebuild includes electric motor replacement or rewinding if necessary, service and check of all internal pump components, upgrade of internal seals in the pump, and full bench test to assure that factory specs are exceeded. Three years warranty.
p/n 8 234 530 or 54347025595 or HB70346-002
Rebuild/Upgrade Service for Left Tension Rod Cylinder for BMW E88 1-Series.
Send in your part(s) first, or select "Order now with core exchange" to order from our inventory. Core exchange orders are subject to a $50 inventory surcharge as well as a $120 refundable core deposit.
Replaced and improved rod seals, piston seals, cap seals, gland seals, wipers, and port seals make these parts better than brand new ones, with an expected service life of 30-50 years under normal circumstances.
P/N: 54347190667