• Special Option: Core exchange for BMW E46 Hydro Unit (AKA Hydraulic Pump)
  • BMW E46 M3, 318ci, 320ci, 323ci, 325ci, 330ci, M3, Hydro Unit (AKA Hydraulic Pump)

Special Option: Core exchange for BMW E46 Hydro Unit (AKA Hydraulic Pump)

$725.00

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.

Quantity

 

No sales tax for orders in the USA

 

We provide world class technical support

 

3-year standard warranty (should last decades)

Note: the pump ships filled with fluid, which makes swapping our rebuilt pump with your original one a quick plug-and-play operation!

For the core return, simply put the same plugs that we put into the hydraulic line ports of the rebuilt pump into your original pump, re-use our packaging, and ship the core back to us. Our pump box easily fits inside a USPS Priority Mail Medium Flat Rate Box.

Standard shipping inside the US is $12.50 (shipping to businesses via FedEx 2-Day Service and shipping to residences via USPS Priority Mail), FedEx Priority Overnight shipping is only $42.50 inside the US. International shipping is $82.50 to most countries, shipping via FedEx International Priority.

The core deposit ($200 out of the $725 that you are paying) gets refunded in full if the matching core is returned within 90 days and it has not been subject of severe abuse (such as damage from DIY repair attempts, or parts on the outside of the pump obviously broken by external forces).

Seals inside the pump get upgraded, and design flaws get rectified. Pumps rebuilt by Top Hydraulics perform better than brand new ones, and Top Hydraulics' seals will far outlast those in brand new pumps. The pump we are shipping to you may not be perfect cosmetically, because it has been used before. We do our best to clean up or polish out external blemishes, but what really matters is what's inside the pump.

The most common failure symptom on used BMW E46 hydro units is a gradual loss of pressure and power. There are various possible reasons for gradual power loss inside the pump/hydro units, ranging from degrading electric motors through pump pistons wearing out and check valves bypassing, to pressure regulators failing, or even hydraulic fluid seeping into the electric motor. Top Hydraulics will check that all these components meet or exceed factory specs and exchange or upgrade them if necessary. Bench testing includes all valve functions, pressure test, flow test, extended load test, and test for leaks, to make sure that factory specs are exceeded before the pump ships back. Beware when purchasing used pumps that those may actually be units that are still pumping, but are not able to complete the convertible top's opening or closing cycle without manual assistance.

Some of these pumps have external leaks (you may find the foam casing soaked in hydraulic fluid). The most common source for external leaks on these pumps are the port seals. Port seals are tiny seals of special shape that are sealing the hydraulic lines when they are plugged into the pump. The port seals are behind brass bushings. These bushings are pressed into the pump housing, and they are made to 1/100 mm precision. Any DIY repair attempt would destroy the bushings. Top Hydraulics replaces the original port seals with an improved version made of Viton, which has practically unlimited shelf life. Before assuming that the pump is leaking externally, check the hydraulic lines going into the pump to make sure they are dry.

The fill plug is a metric (5-mm) Allen bolt. It is the one closest to the level marker on the reservoir. Make sure to have a fitting 5-mm outside hex wrench, so that you do not strip the inside hex of the plug. Please drain the fluid through the drain plug before shipping the pump to us, unless you have a hard time getting the fill plug open.

Removal of the pump from the car is easy - this is "plug and play":

1) Remove panels inside the trunk to create access to your pump, located in the forward left corner of your trunk.

2) Remove the single bolt that mounts the pump in its foam cover against the car's chassis.

3) Pull the pump out of the protective foam housing, and unplug it from the main wiring harness.

4) Rotate the two retaining discs that hold all hydraulic hoses. Rotate counter-clockwise some 10-15 degrees, until the hoses can be pulled out. No need to loosen or fasten any bolts for this - the plates will simply click into place. No need to mark the hose locations - each hose has a number printed on it near its metal fitting, and that number matches the number engraved on the retaining disc.

5) Drain the hydraulic fluid through the fill plug (it is good to replace old fluid, anyway), replace the plug, disconnect the remaining wires from the motor and the solenoid, wrap the pump in a large garbage bag, then inside another one, box up well, and send the pump to Top Hydraulics.

You can save some money by using Mercedes fluid 0009899103 or FeBi 02615 - they are fully compatible with your BMW 3-Series cabriolet hydraulics. Fill the pump through the fil plug. The fluid level is supposed to be within the round level marker on the reservoir when the convertible top is down. Do not overfill the reservoir. Adjust the fluid level after the top has cycled a few times. Give the pump motor a break (to cool down) latest after three complete cycles or 2 minutes of running time.

The official BMW part number is 54347025595 (or 54 34 7 025 595); p/n 8 234 530 or HB70346-002 are usually printed on the pump. Fits model years 2000-2006. If you have an early model year (2000 or 2001), then you need an adapter p/n 54347076030 (or contact us and we will provide the pump that matches the original equipment in your car, without the need for an adapter).

International customers: please select the $55 FedEx International shipping option during checkout if you are located in Canada or inside the EU and please select the $85 FedEx International shipping option if you are located elsewhere - the option will appear after you have entered and saved your shipping address.

54347025595, 54348234530

Specific References

Related Products:

New, Extended Hydraulic Line # 34 for 2003-2006 BMW E46 convertibles.

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, top fitting, where the lines are attached via a screwed on clamp.

Price
$179.99
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This is a special Core exchange option only.

We ship you a pair of E46 Bow Tension Cylinders from our inventory, and you send us back your old parts for a refund of your $300 deposit.

NOTE: If you have a 2003 model, we will need to know if your left bow tension cylinder has a detachable (clip-on) aluminum line fitting before you place your order

Price
$750.00
Quick view

BMW E46 1998-2006|330ci, 325ci, 323ci, M3, etc

 

Rebuild service for Hydraulic Valve Block aka Control Unit BMW p/n 54347025592

Send in your part for for rebuild/upgrade service, or get immediate shipment from our inveentory if you choose optional core exchange.

Price
$350.00
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It is highly recommended to upgrade the bow tension cylinders in pairs. You send in your cylinder(s) first.

Core exchange is available only for pairs of bow tension cylinders - see our separate listing.
Top Hydraulics replaces and upgrades all seals in this cylinder, including the port seals where the hoses go into the cylinder housing.

Price
$225.00
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 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.

Price
$1,400.00
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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.

 

Price
$2,000.00
Quick view

New, Extended Hydraulic Line # 31 for 2003-2006 BMW E46 convertibles.

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.

Price
$179.99
Quick view

Replace one crimped-on Hydraulic Line # 31, 32, 33, or 34 on Bow Tension Cylinders for 2000-2003 BMW E46 convertibles.

Early model years (cut-off somewhere in 2003) have bow tension cylinders aka clamping bar cylinders with hydraulic lines that cannot be removed from the cylinder. Send in your left side cylinder, and Top Hydraulics will replace the line with OEM material.

Price
$200.00
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New, Extended Hydraulic Line # 23 for 2000-2006 BMW E46 convertibles.

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.

Price
$199.99
Quick view

Rebuild/upgrade service for single main lift cylinder 2000 - 2006| BMW E-46 chassis

Rebuild/upgrade service (using best seals available ) for BMW convertible hydraulic lifting system. It is highly recommended to upgrade the main lift cylinders in pairs. Send in your cylinders or order from our stock with optional Core Exchange.

Price
$125.00
Quick view

Top Hydraulics upgrades the seals in these cylinders with far superior material. It is highly recommended to upgrade the tonneau/case cover cylinders in pairs. You send in your cylinder(s) first, or order from our stock with the core exchange option below. 

BMW P/N: 54348236956

Price
$125.00
Quick view

New, Pair of Extended Hydraulic Lines # 23 & 24 for 2000-2006 BMW E46 convertibles

Extended version of the OEM hoses, 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.

Price
$349.99
Quick view

New, Extended Hydraulic Line # 24 for 2000-2006 BMW E46 convertibles.

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.

Price
$199.99
Quick view

Rebuild/upgrade service for left bow tension cylinder in 2000 - 2006| BMW E46 convertible chassis

It is highly recommended to upgrade the bow tension cylinders in pairs. You send in your cylinder(s) first.

Price
$125.00
Quick view
Top Hydraulics upgrades the seals in these cylinders with far superior material. It is highly recommended to upgrade the tonneau/case cover cylinders in pairs. Send in your cylinders first, or order from our stock with the core exchange option below.


BMW part number 54348243269

Price
$125.00
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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

Price
$500.00
Quick view