EURORELIC

17 11 1 742 231 –Radiator cap (2,0BAR)

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

BMW part number 17 11 1 742 231 (17111742231) is the Radiator cap (2,0BAR), a cooling part catalogued for the E46 (320Ci, 320i, 323Ci), E36 (316i, 316i 1.6, 318i), E38 (730i, 730iL, 740i), E36/7 (Z3 M3.2, Z3 1.8, Z3 1.9), E32 (730i, 730iL, 735i), E39 (520i, 523i, 535i) and 8 more chassis. As of our last check (2026-10-08, bmwpartsdeal.com), it has been superseded by 17117639022. Interchange records list it on F07, F10, F11, F06, F12, F13 as well. 4 aftermarket options, 1 repair guide below.

  1. 1 New from BMW
    Order the replacement number 17117639022
  2. 2 Aftermarket new
    4 options (OE supplier, budget)
  3. 3 Used / NOS
    Search live listings on eBay US/DE.
  4. 4 Interchange
    Same BMW number listed on 9 other chassis
  5. 5 Kit / reman
    None recorded yet
  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

Replaced by 17117639022. Order the newer number.

  • 🇺🇸 USSupersededbmwpartsdeal.com
  • 🇪🇺 EuropeSupersededsuccessor 17117639022: Leebmann24 (DE): "1-3 Working Days" €17.98 (our Leebmann24 lookup of 2026-09-28)leebmann24.com
View 17111742231 at bmwpartsdeal.comCross-reference 17111742231 on RealOEMCatalog diagram (bmwfans.info)

Aftermarket options (4)

OE supplier (2)
Made by the company that supplied BMW (named in BMW's catalog, or labelled OE by the vendor).
Mahle Behr CRB22000P
BMW Expansion Tank Cap - Mahle Behr 17117639022
Listed for successorlists 17117639022why this tier
View Mahle Behr CRB22000P at FCP Euro · $14.69Search eBay for Mahle Behr CRB22000P ↗
source checked 2026-09-29
Rein CPE0030P
Coolant Reservoir Cap
Listed cross-refwhy this tier
View Rein CPE0030P at RockAuto · $10.11 eachView Rein CPE0030P at FCP Euro · $13.76Search eBay for Rein CPE0030P ↗
source checked 2026-09-29
Budget (2)
Lowest price. Fine for some jobs; quality and service life vary more.
URO Parts 17111712669
Coolant Reservoir Cap
Listed cross-refwhy this tier
View URO Parts 17111712669 at RockAuto · $5.81 eachSearch eBay for URO Parts 17111712669 ↗
source checked 2026-09-29
Vaico V2000971
Radiator Cap
Listed cross-refwhy this tier
View Vaico V2000971 at RockAuto · $8.01 eachSearch eBay for Vaico V2000971 ↗
source checked 2026-09-29

Each option links to the page that lists it as replacing this BMW number (price as listed on the check date). Tiers marked “brand class” are our classification of the brand, not a test of this part. Aftermarket parts are not BMW parts: quality varies and fitment is not guaranteed.

Where to buy

Every link opens 17111742231 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 17117639022 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

17111742231→17117639022

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

Used & NOS listings

Cross-model interchange (42)

Listed directly for E46 and E36 and E38 and E36/7 and E32 and E39 and E85 and E65 and E66 and E83 and E31 and E53 and E86 and E52 in our data (see Fits). Models below are other listings of the same number.

Via successor numberCatalog match (partial list)shared number 17117639022bmwfans.info

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

F10
523i N53528i N53530i N53M5 S63N550i N63N550iX N63N
F06
650i N63N650iX N63N650iX 4.0 N63N650iX 4.4 N63NALPINA B6 N63NM6 S63N
F02
750Li N63N750LiX N63N750LiX 4.0 N63N750LiX 4.4 N63NALPINA B7L N63NALPINA B7LX N63N
F12
650i N63N650iX N63N650iX 4.0 N63N650iX 4.4 N63NM6 S63N
F13
650i N63N650iX N63N650iX 4.0 N63N650iX 4.4 N63NM6 S63N
F07
550i N63N550iX N63N550iX 4.0 N63N550iX 4.4 N63N
F11
523i N53528i N53530i N53550i N63N
F01
750i N63N750iX N63NALPINA B7 N63NALPINA B7X N63N
E67
745LiS N62760LiS N73

+83 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 (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.

ArticleFCP EuroDifficulty: Easywritten for E39lists this part number

How To Replace A BMW E39 Coolant Expansion Tank (Six-Cylinder) ↗

Six-cylinder E39 expansion tank swap: drain, unclip hoses and the level sensor, unbolt the tank, transfer the sensor and fit a new cap and bleeder. Only hand tools and jack stands needed.

Tools mentioned: Screwdrivers, drain pan, jack and stands

Level switch 61318360876 and cap 17111742231 are in the article's parts list.

by Alex Fiehl · fcpeuro.com· link checked 2026-10-08

Notes & sources

Successor 17117639022 listed at $23.00 on bmwpartsdeal (InStock).