EURORELIC

34 51 1 157 874 –Hydro unit (Automatic)

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

BMW part number 34 51 1 157 874 (34511157874) is the Hydro unit (Automatic), a brakes part catalogued for the E34 (518i, 520i, 524td), E32 (730i, 730iL, 735i), E31 (850Ci). As of our last check (2026-10-08, bmwpartsdeal.com), BMW lists it as no longer available new (NLA). 1 kit or reman option below.

⚠ Safety-critical part. Have a qualified mechanic verify fitment and installation before driving.
  1. 1 New from BMW
    No longer available new (per source; may be market-specific).
  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
    No guide yet
  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.

View 34511157874 at bmwpartsdeal.comCross-reference 34511157874 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 34511157874 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. 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.

Used & NOS listings

Cross-model interchange (0)

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

Same part numberCatalog match (partial list)bmwfans.info

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

+12 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 (0)

No repair write-up or video linked for this part yet.

Notes & sources

E34: Last listed $2093.29 on bmwpartsdeal (not orderable). SAFETY-CRITICAL (brakes/steering/fuel): have a qualified mechanic verify fitment and installation. E31: Last listed $2093.29 on bmwpartsdeal (not orderable). SAFETY-CRITICAL (brakes/steering/fuel/airbag): have a qualified mechanic verify fitment and installation. E32: Last listed $2093.29 on bmwpartsdeal (not orderable). SAFETY-CRITICAL (brakes/steering/fuel/airbag): have a qualified mechanic verify fitment and installation.