Will BMW E46 coolant expansion tank (17117573781) fit a BMW 3 Series (E46, 1999-2006)?
Added · Updated
Short answer: Yes, reportedly Reported
Verdict:Fits Reported confidence (2 of 3) · 2 sources
Yes, reportedly: Yes for non-M six-cylinder cars.
| Part | BMW E46 coolant expansion tank (17117573781) (part no. 17117573781) |
|---|---|
| Vehicle | BMW 3 Series (E46, 1999-2006) |
| Years | 1999-2006 |
| Trim / condition | non-M six-cylinder (323i-330i, incl. xi and wagon); M3 not covered |
| Verdict | Fits Reported to fit |
| Confidence | Reported 2 of 3 — Stated by one reasonably reputable source (retailer, shop, magazine). Not independently confirmed. |
| Last verified | 2026-10-26 (date the cited sources were last read) |
Details
Yes for non-M six-cylinder cars. RM European lists this BMW tank and the 17111742231 cap in its E46 cooling overhaul and says the cooling system is nearly identical across 1999-2006 cars. Pelican's tank article covers 323 to 330 sedans, coupes, wagons and xi models. The tank part number comes from one retailer; check by VIN.
Specs
- cap: 17111742231 (RM European list)
- note: Level sensor sits in the bottom of the tank (Pelican).
Related known issues
Related build entries
Other cooling fitment for the E46
- BMW E46 water pump (11517509985) — Reported to fit Fits
- BMW E46 thermostat (11537509227) — Reported to fit Fits
More for this car
- All BMW 3 Series (E46, 1999-2006) fitment answers · E46 common problems
- Newsletter archive: past issues with every new and corrected entry
Sources
- BMW E46 Cooling System Overhaul — RM European (parts retailer) (vendor article; read 2026-10-26; full page read)
- BMW E46 Coolant Expansion Tank Replacement — Pelican Parts (parts retailer tech article) (vendor article; read 2026-10-26; full page read)
Summaries are in our own words. Fitment is not guaranteed — disclaimer.
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