

It is highly recommended to upgrade the bow tension cylinders in pairs. You send in your cylinder(s) first.
No sales tax for orders in the USA
We provide world class technical support
3-year standard warranty (should last decades)
See removal instructions https://www.tophydraulics.com/e46bowcylinders.pdf in our DIY section. You remove your cylinders you would like to have rebuilt, and send them to us. Core exchange (from our stock) is available ONLY for full sets of BMW cylinders. See removal instructions in our DIY section.
NOTE: There was a change in cylinder design in 2002 or 2003, depending on country. Earlier model years have the detachable aluminum piece on the left side bow tension cylinder, which has the hydraulic lines permanently attached to it. This version is shown in the above picture. Newer model years have the hydraulic lines individually detachable from the left bow tension cylinder. In newer versions, lines 31 and 34 going to the valve block can be removed individually. Older and newer version bow tension cylinders (aka tension bar cylinders) are fully interchangeable as pairs, but not individually.
The right side cylinder always has the lines permanently attached, and the lines can be removed from the left side cylinder (clip on old version and T10 Torx bolt on new version).
P/Ns 54347025599, 54347025600
International shipping: One or two of these cylinders can be return shipped in an International Priority Mail or Express Mail Envelope (we box them up inside the envelope).
54347025599, 54347025600 |
You send in your malfunctioning E88 1-Series hydro unit, and Top Hydraulics rebuilds it. The rebuild 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.
p/n 54-34-7171303 or 54347190715
Extended version of the OEM hose, which greatly reduces labor needed to replace and eliminates the same manufacturing/design error seen with this hose originally in your 3-Series Convertible. Only available from Top Hydraulics.
Rebuild/Upgrade service for your 2002-2009 BMW 7-Series Hydraulic Trunk Lid Pump.
745i, 745Li, 750Li, 760Li
Pump only, cylinder rebuild is separate
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
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.
Send in your part for for rebuild/upgrade service, or get immediate shipment from our inveentory if you choose optional core exchange.
Price listed is for rebuild/upgrade service for an individual hydraulic hinge cylinder.
Expedited Core Exchange Option includes a $250 Refundable Core Charge plus a $75 surcharge for inventory management.
It is highly recommended to upgrade them in pairs. These hydraulic cylinders always fail almost simultaneously.
To order a pair of hinges instead, click here.
You send in your malfunctioning E63/E64 6-Series hydraulic pump unit, and Top Hydraulics rebuilds it. The rebuild includes electric motor replacement or rewinding if necessary, service of hydraulic and solenoid valves, service of moving parts and replacement as necessary, upgrade of internal seals in the pump to eliminate current or future pressure loss or internal bypass, and extensive testing to ensure the pump exceeds factory specs. Three years warranty.
p/n: 54347154648
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 $200 core refund. Top Hydraulics ships a pump as pictured: no mounting frame and no wiring harness, in order to keep the shipping cost low. You get a pump that has been rebuilt to outlast and outperform brand new ones.
BMW part number 54347025595, see more detailed notes below. Aka 54348234530. Number printed on the pump is normally 8 234 530.
Please make a special note in your order if you have a model year 2000 or 2001.
BMW part number 54348243269
Rebuild/Upgrade Service for the full set of BMW F23 2-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.
Rebuild & Upgrade service for your BMW 5-Series (E61) Hydraulic Liftgate Pump. p/n 51247163661 (p/n printed on the pump is 7111867 and HB70401-002 or HB70401-001)
525xi, 528xi, 530xi, 535xi, 525xd and 530xd
Select "send in your parts first" for the $400 rebuild, or select "order now with core exchange" for a pump shipping from Top Hydraulics' inventory first.
Rebuild/Upgrade Service for Right Tension Rod Cylinder for BMW F23 2-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: 54347421760
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
Rebuild/Upgrade Service for Right 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