EURORELIC

34 51 0 026 458 –Rmfd hydro unit ASC (Automatic)

NLA newchecked 2026-10-08source: bmwpartsdeal.commarket: US+EU

BMW part number 34 51 0 026 458 (34510026458) is the Rmfd hydro unit ASC (Automatic), a brakes part catalogued for the E32 (730i, 730iL, 750i), E31 (840i, 850Ci, 850CSi), E34 (530i, 540i). As of our last check (2026-10-08, bmwpartsdeal.com), BMW lists it as no longer available new (NLA). Newer number: 34511163086. 1 kit or reman option, 1 repair guide below.

⚠ Safety-critical part. Have a qualified mechanic verify fitment and installation before driving.
  1. 1 New from BMW
    Superseded, but the successor is also discontinued.
  2. 2 Aftermarket new
    No sourced aftermarket equivalent yet
  3. 3 Used / NOS
    Search live listings on eBay US/DE.
  4. 4 Interchange
    No cross-model match in our data
  5. 5 Kit / reman
    1 kit or service option
  6. 6 Community fix
    No forum workaround recorded yet
  7. 7 DIY guide
    1 repair how-to linked (forum, article, video)
  8. 8 Paid hunt
    We search dealers, breakers and forums for you.

Buy new

Not available new from the US or the European dealer we checked. BMW Classic or another dealer may still locate one with your VIN.

  • 🇺🇸 USNLA newbmwpartsdeal.com
  • 🇪🇺 EuropeNLA newsuccessor 34511163086: Leebmann24 (DE): "Not available" (our Leebmann24 lookup of 2026-09-28)leebmann24.com
View 34510026458 at bmwpartsdeal.comCross-reference 34510026458 on RealOEMCatalog diagram (bmwfans.info)

Aftermarket options (0)

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.

Where to buy

Every link opens 34510026458 at that seller: “View” = the part’s own page, “Look up” = the seller’s part-number page, “Search” = the seller’s search pre-filled with the number (successor 34511163086 where shown). You can order from either region.

United States

Europe (DE · UK · DK)

“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.

Supersession chain

34510026458→34511163086

Successor also discontinued per source

Older numbers on the left, newest on the right. Numbers without a record open a lookup.

Used & NOS listings

Cross-model interchange (0)

Listed directly for E32 and E31 and E34 in our data (see Fits). Models below are other listings of the same number.

Via successor numberCatalog match (partial list)shared number 34511163086bmwfans.info

Same BMW part number, but the source list is truncated or market-specific. More models may apply.

+2 more models not listed by the source.

Community fixes (0)

No forum workaround recorded yet. If you know a thread, the hunt team wants to hear about it.

Kits, reman & retrofits (1)

Reman / repair serviceunverified
BMW ABS module repair service
ECU Testing
Price not listed
View product page on ecutesting.com ↗

DIY

No DIY route recorded yet.

Repair guides & how-tos (1)

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. Safety-critical part: have a qualified mechanic check the work.

ArticleTimm's BMW (meeknet.co.uk)Difficulty: Easywritten for E31

Timm's BMW E31 Solving ABS Pump Problems ↗

ABS and ASC lights on a cold day are often a seized hydraulic-unit pump motor from lack of use. Timm frees it by running the pump from INPA, or without diagnostics by bridging the pump relay, before considering a replacement unit.

Tools mentioned: INPA (optional), insulated jumper for the relay

by Timm · meeknet.co.uk· link checked 2026-10-08

Notes & sources

E34: Superseded chain 34510026458 > 34511163086; final PN also discontinued on bmwpartsdeal. SAFETY-CRITICAL (brakes/steering/fuel): have a qualified mechanic verify fitment and installation. E31: Superseded chain 34510026458 > 34511163086; final PN also discontinued on bmwpartsdeal. SAFETY-CRITICAL (brakes/steering/fuel/airbag): have a qualified mechanic verify fitment and installation. E32: Superseded chain 34510026458 > 34511163086; final PN also discontinued on bmwpartsdeal. SAFETY-CRITICAL (brakes/steering/fuel/airbag): have a qualified mechanic verify fitment and installation.