EURORELIC

51 21 8 372 842 –Master key with remote control (code) (315 MHZ)

Supersededchecked 2026-10-08source: bmwpartsdeal.commarket: US (EU: not orderable)

BMW part number 51 21 8 372 842 (51218372842) is the Master key with remote control (code) (315 MHZ), a body part catalogued for the E31 (840Ci, 840i, 850Ci), E34 (540i). As of our last check (2026-10-08, bmwpartsdeal.com), it has been superseded by 51218374064. Interchange records list it on E36, E36/7 as well.

  1. 1 New from BMW
    Order the replacement number 51218374064
  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 2 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

Replaced by 51218374064. Order the newer number.

  • 🇺🇸 USSupersededbmwpartsdeal.com
  • 🇪🇺 EuropeNLA newsuccessor 51218374064: Leebmann24 (DE): "Not available" (our Leebmann24 lookup of 2026-09-28)leebmann24.com
View 51218372842 at bmwpartsdeal.comCross-reference 51218372842 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 51218372842 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 51218374064 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

51218372842→51218374064

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

Used & NOS listings

Cross-model interchange (12)

Listed directly for 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 51218374064bmwfans.info

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

E36
316g M43316i M43316i 1.6 M43316i 1.9 M43318i M43318is M42
E36/7
Z3 1.8 M43Z3 1.9 M43Z3 1.9 M44Z3 2.0 M52Z3 2.2i M54Z3 2.5i M54

+22 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

Successor 51218374064 listed at $391.22 on bmwpartsdeal (InStock).