DIY: Convertible hydraulic cylinders and lines ↗
Owner DIY on replacing the convertible-top hydraulic rams and their lines: trunk lining out, pump fuse pulled, numbered lines disconnected and capped, then the system refilled and cycled to bleed.
BMW part number 54 34 7 025 598 (54347025598) is the Hydraulic hose, master cylinder, right (23;24) – Convertible, a convertible top / sunroof part catalogued for the E46 (320Ci, 323Ci, M3). As of our last check (2026-09-28, bmwpartsdeal.com), BMW lists it as no longer available new (NLA). 2 repair guides below.
Not available new from the US or the European dealer we checked. BMW Classic or another dealer may still locate one with your VIN.
No sourced aftermarket equivalent recorded yet. We only list brand numbers that a brand catalog or vendor page explicitly cross-references to this BMW number.
“Ships internationally” is shown only where we read it on the vendor’s own shipping page (checked 2026-09-28); otherwise check with the vendor. Import duties and taxes are the buyer’s responsibility. Amazon links carry our Associates tag, so we may earn a commission; other seller links are not affiliate links today.
No interchange recorded. That doesn't prove there isn't one; it means we have no sourced match yet.
No forum workaround recorded yet. If you know a thread, the hunt team wants to hear about it.
No kit or reman service recorded yet.
No DIY route recorded yet.
Write-ups and videos from owners, forums and specialists on removing and fitting this part. Summaries are ours; follow the link for the full steps, photos and torque values, and credit goes to the original author.
Owner DIY on replacing the convertible-top hydraulic rams and their lines: trunk lining out, pump fuse pulled, numbered lines disconnected and capped, then the system refilled and cycled to bleed.
Why line #23 (valve block to the passenger-side main lift cylinder) creases and splits on E46 convertibles, how to spot the crease behind the driver-side panel, and a 23-page photo procedure for replacing it.
Tools mentioned: Small flat screwdriver, rags
Lines 23/24 are part of our right-hand master-cylinder hose.
bmwpartsdeal (US) marks discontinued; bmwfans ETK data does not flag it. Last listed $347.18 on bmwpartsdeal (not orderable).
Live eBay listings are coming soon. Until then, search eBay directly for this number with the links below.