EURORELIC

12 31 1 713 945 –Pulley alternator (DB=55MM)

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

BMW part number 12 31 1 713 945 (12311713945) is the Pulley alternator (DB=55MM), an electrical part catalogued for the E83 (X3 2.5i, X3 3.0i). As of our last check (2026-10-08, bmwpartsdeal.com), BMW lists it as no longer available new (NLA). Interchange records list it on E46, E53, E60, E39, E36, E34 as well.

  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
    Same BMW number listed on 10 other chassis
  5. 5 Kit / reman
    None recorded yet
  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 12311713945 at bmwpartsdeal.comCross-reference 12311713945 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 12311713945 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 (34)

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.

E46
320Ci M54320Ci M52320i M52320i M54323Ci M52323i M52
E39
520i M52520i M54523i M52525i M54528i M52530i M54
E36
318i M43320i M50320i M52323i M52323i 2.4 M52323ti M52
E36/7
Z3 1.8 M43Z3 1.9 M44Z3 2.2i M54Z3 2.5i M54Z3 3.0i M54Z3 M3.2 S50
E60
520i M54525i M54530i M54
E34
520i M50525i M50525ix M50
E53
X5 3.0i M54
E61
525i M54
E65
730i M54
E66
730Li M54

+16 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 (0)

No kit or reman service recorded yet.

DIY

No DIY route recorded yet.

Repair guides & how-tos (0)

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

Notes & sources

Last listed $39.74 on bmwpartsdeal (not orderable).