Seal Ring1 304 178 4

BMW OE number, as listed in aftermarket supplier catalogues. Compare listings for this exact number, then confirm the part number and vehicle fitment before ordering.

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What each marketplace’s search lists for this number, lowest price first, Ovoko last. Listings can include other parts that name it.

AUTODOC

1 listing

New

Checked 2026-05-15 13:53 UTCAftermarket parts whose suppliers list this OE number, not the original part.

€2.26Cheapest listing: ELRING 278.386+ €6.95 shipping to GermanyView on AUTODOC

Ovoko

No listings

Used

Checked 2026-10-23 05:31 UTC

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Aftermarket part numbers

Supplier articles whose catalogue lists 1 304 178 4. Check the supplier’s own restrictions before ordering. A fitment condition under a part number is one its supplier names for at least one of the vehicles the part is listed for, not for all of them: a vehicle’s page shows which apply to it.

What these parts’ suppliers state

Each value belongs to the part number beside it, not to the OE number: parts that list one OE number can differ. Where your vehicle manufacturer gives a value, it takes precedence.

Specification	Value and the part numbers stating it
Fitting position	Cylinder Head ELRING 278.386 Exhaust Turbocharger ELRING 278.386 Thermostat ELRING 278.386 frontal sided ELRING 278.386

ELRING: 278.386Inner Diameter: 22 mm Outer Diameter: 26 mm Thickness: 2 mm Material: FPM (fluoride rubber) Cross-Sectional Form: O-Ring Goods tariff number: 3,926,904,510 Goods tariff number: 3,926,909,985
+4 moreShow fewer
Fitting position: Cylinder Head; frontal sided; Exhaust Turbocharger; ThermostatFitment conditions:Required quantity: 1, 4, 6 Engine Code: M47 D20 (204D4), M57 D30 (306D3) Block Separation

Vehicle fitment

Engine code and production dates decide fitment. Model name and year alone don’t.

152 vehicles in 48 model series, inferred

Aftermarket parts that list 1 304 178 4 fit these vehicles according to their supplier catalogues. That does not prove 1 304 178 4 itself fits every one: check the engine code, production dates and the supplier’s restrictions on the model series’ vehicle pages.

Alpina

4 model series · 4 vehicles

Alpina model series inferred from aftermarket parts
Model series	Production	Engine codes	HSN / TSN
D10 (E39) 1999–20041 vehicle	04/2000 – 10/2003	G1	Not listed
D10 touring (E39)1 vehicle	04/2000 – 10/2003	G1	Not listed
D3 (E90) 2005–20111 vehicle	12/2005 – 04/2008	20 4D 4	Not listed
D3 touring (E91) 2005–20131 vehicle	05/2006 – 04/2008	20 4D 4	Not listed

BMW

44 model series · 148 vehicles

BMW model series inferred from aftermarket parts
Model series	Production	Engine codes	HSN / TSN
1 (E81)1 vehicle1 of them: some versions only	09/2006 – 12/2011	20 4D 4, N47 D20A, N47 D20C	0005 / ACP, ARR
1 (E87) 2004–20113 vehicles1 of them: some versions only	06/2004 – 06/2011	20 4D 4, M47, M47N, N47 D20A, N47 D20C	0005 / 164, 167, 173, 833, AAG, AAI, AAL, AAN, ACP, ACQ, ACT, ACV, ASI
3 (E30)1 vehicle	09/1987 – 12/1990	20 4E A, S14	Not listed
3 (E46)18 vehicles2 of them: some versions only	08/1999 – 02/2007	M47, M47N, M57, M57N	0005 / 661, 662, 712, 713, 720, 725, 726, 737, 738, 763, 764, 765, 766, 767, 768, 769, 770, 771, 815, 842, AEK, AEM, AET, AEV
3 (E90) 2004–20118 vehicles	06/2004 – 09/2008	20 4D 4, 30 6D 3, 30 6D 5, M47N2, M57, M57N2, N47	0005 / 821, 830, 870, 872, 873, 875, 882, ADG, ADH, ADL, ADR, ADS, ADU, AEC, AFG, AFH, AWB, AWO
3 (E90) LCI4 vehicles	03/2008 – 12/2011	20 4D 4, 30 6D 3, 30 6D 5, M57N2, N47 D20C, N57	0005 / 821, 870, ADR, ADS, AFG, AFH, AWB, AWO
3 (E91) 2004–20128 vehicles	12/2004 – 08/2008	20 4D 4, 30 6D 3, 30 6D 5, M47N2, M57, M57N2	0005 / 850, 854, 878, 879, 885, ABZ, ACA, ADM, ADP, ADW, ADZ, AED, AFJ, AFK, AXE, AXR, BDT, BEA
3 (E91) LCI4 vehicles	09/2007 – 08/2012	20 4D 4, 30 6D 3, 30 6D 5, M57N2, N47 D20C, N57	0005 / 850, 879, ADP, ADZ, AFJ, AFK, AXE, AXR, BDT, BEA
3 (E92) 2006–20135 vehicles	06/2006 – 03/2013	30 6D 3, 30 6D 5, M57N2	0005 / AFN, AFP, AFR, AGV, AJQ, AVL
3 (E92) LCI1 vehicle	12/2008 – 03/2013	30 6D 5, M57N2	0005 / AFP, AVL
3 (E93) 2006–20132 vehicles	03/2007 – 02/2010	30 6D 3, M57N2	0005 / AHO, AKX
5 (E39)6 vehicles	05/1998 – 06/2004	M57	0005 / 631, 632, 672, 673, 696, 697
5 (E60) 2003–9 vehicles	06/2003 – 03/2007	20 4D 4, 25 6D 2, 30 6D 4, M47N2, M57N, M57N2	0005 / 761, 762, 795, 796, 797, 809, 859, 863, 865, 867, AAY, ABH, ABI, ABL, ABO, ABQ, ABS, ACE
5 (E60) LCI5 vehicles	02/2007 – 05/2010	30 6D 5, M57N2	0005 / AIC, AID, AIE, AIQ, AJE
5 (E61) 2003–20109 vehicles	10/2003 – 03/2007	20 4D 4, 25 6D 2, 30 6D 2, 30 6D 4, M47N2, M57N, M57N2	0005 / 792, 793, 794, 810, 860, 864, 866, 868, ABB, ABE, ABM, ABR, ABT, ABU, ABW, ACF
5 (E61) LCI6 vehicles	02/2007 – 12/2010	20 4D 4, 30 6D 5, M47N2, M57, M57N2, N47 D20A, N47 D20C	0005 / 866, ABB, AII, AIJ, AIK, AIT, AJF
6 (E63) LCI1 vehicle	09/2007 – 05/2011	30 6D 5, M57N2	0005 / AKH
6 (E64) LCI1 vehicle	09/2007 – 05/2010	30 6D 5, M57N2	0005 / AKI
7 (E38)2 vehicles	05/1998 – 05/2002	M57	0005 / 635, 677
7 (E65)4 vehicles	06/2002 – 08/2008	30 6D 2, 30 6D 3, M57, M57N, M57N2	0005 / 746, 748, 752, 824, ACI, ACK
7 (E66)1 vehicle	06/2005 – 08/2008	30 6D 3, M57N2	0005 / 824, ACK
M 11 vehicle	05/1979 – 08/1981	Not listed	0575 / 301
M3 (E30)8 vehicles	09/1986 – 12/1991	25 4S 1, S14, S14B23	0575 / 302, 303, 305
M3 (E90) 2007–20081 vehicle	03/2007 – 07/2008	S65 B40A	7909 / AAI, AAL
M3 (E90) LCI2 vehicles	09/2008 – 12/2011	S65 B40A, S65 B44A	7909 / AAI, AAL, AAS
M3 (E92) 2007–20132 vehicles	03/2007 – 06/2013	S65 B40A, S65 B44A	7909 / AAH, AAM, AAT, AAW
M3 (E92) LCI1 vehicle	03/2010 – 06/2013	S65 B40A	7909 / AAH, AAM, AAW
M3 (E93) 2007–20101 vehicle	07/2007 – 02/2010	S65 B40A	7909 / AAJ, AAN
M3 (E93) LCI1 vehicle	03/2010 – 10/2013	S65 B40A	7909 / AAJ, AAN
M5 (E28)1 vehicle	07/1984 – 12/1987	S38	Not listed
M5 (E34)3 vehicles	09/1988 – 07/1995	S38	0575 / 304, 306, 307 7909 / 302, 304
M5 (E60)1 vehicle	09/2004 – 03/2007	S85 B50A	7909 / 317, AAE, AAO
M5 (E61) LCI1 vehicle	03/2007 – 04/2010	S85 B50A	7909 / AAG, AAP
M6 (E24)2 vehicles	03/1984 – 05/1989	S38	0005 / 434, 464
M6 (E63) 2005–20071 vehicle	04/2005 – 09/2007	S85 B50A	7909 / 318, AAD, AAQ
M6 (E63) LCI1 vehicle	01/2008 – 12/2010	S85 B50A	7909 / 318, AAD, AAQ
M6 (E64) 2006–20071 vehicle	09/2006 – 09/2007	S85 B50A	7909 / AAF, AAR
M6 (E64) LCI1 vehicle	01/2008 – 08/2010	S85 B50A	7909 / AAF, AAR
X3 (E83) 2003–20094 vehicles	02/2004 – 08/2007	M47N2, M57N, M57N2	0005 / 788, 808, 852, 853, ACB, ACD, AKO
X3 (E83) LCI4 vehicles	09/2006 – 04/2011	M57N2	0005 / 853, ACB, ACC, AEZ, AKO, AKP, AKQ
X5 (E53)3 vehicles	03/2001 – 12/2006	M57, M57N	0005 / 679, 786, 791, ACN, ACO
X5 (E70) 2006–20135 vehicles	12/2006 – 03/2010	M57, M57N2	0005 / AHG, AHH, AJO, AYB, BAW, BBF, BBJ
X5 (E70) LCI2 vehicles	10/2008 – 07/2013	M57, N57	0005 / AHH, AJO, AYB, BAW, BBF, BBK
X6 (E71)2 vehicles	01/2008 – 06/2014	M57N2, N57	0005 / AHG, AJO, BBJ