Alternator Belt - BMW Oilhead, Hexhead - 592mm; 12 31 7 681 841 / Continental Contitech
Alternator Belt - BMW Oilhead, Hexhead - 592mm; 12 31 7 681 841 / Continental Contitech
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Alternator Belt - BMW Oilhead, Hexhead - 592mm; 12 31 7 681 841 / Continental Contitech

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Ribbed Alternator Belt - developed for and supplied as the original equipment for BMW.

Continental Contitech Part # 4PK611ELAST. Fits Denso 40 Amp Alternator and DENSO Bosch 50 Amp Alternator

Vehicle Manufacturer: BMW
Application: BMW Hexhead. Oilhead Models
Make/Model: BMW: HP2, R850, R1100S, R1150, R1200
Model Years: 1996 - 2010
Manufacturer #: 12 31 7 681 841
Length: 592mm

We recommend you look at your old belt prior to ordering. In some cases, this belt applies to the later dual spark models. You may be able to confirm the correct belt if the BMW # ...12 31 7 681 841 is still legible. The Continental Ref # 4PK611ELAST should also be visible. Or the length which is 592mm.

NOTE: There can be confusion regarding the new Continental Contitech Belt PART #’s which have recently been modified (2nd QTR , 2012). There are now 2 Continental Belt Part #’s ending with 611
  • 4PK611 Length = 611 mm
  • 4PK611ELAST Length = 592 mm


Please refer to the photos for details of how to identify the length in mm of the belt. Our selection includes the following belts:


Continental / Contitech Part #: 4PK611

Length: 611mm
Application: BMW R Oilhead 4 valve
Make/Model: BMW : R850, R1100, R1150, R1200C
Model Years: 1992-2002
Manufacturer #: 12 31 1 341 779
EME Part # Belt-4PK611779

Continental / Contitech Part #: 4PK611ELAST
Length: 592 mm
Application: BMW R Oilhead 4-valve, Hexhead
Make/Model: BMW : R850, R1100, R1150, R1200
Model Years: 1996-2010
Manufacturer #: 12 31 7 681 841
EME Part# Belt-4PK592841

Continental / Contitech Part #: 4PK592ELAST
Length: 582mm
Application: BMW R Series Hexhead
Make/Model: BMW : R900, R1200
Model Years: 2005-2011
Manufacturer #: 12 31 7 690 571



Continental Contitech specifically designed the Contitech Elastic technology for use on the non-tensioned BMW alternators. Use of any other manufacturers belt will not ensure proper tension over prolonged periods.

Use of other brand belts can lead to
  1. Premature alternator bearing failure due to too tight of a belt tension.
  2. Belt slippage due to too loose of a belt tension.
  • Temperature-stable from -30 to 80 °C
  • Tropicalized - withstands high heat extremes
  • Extremely long service life
  • Conditionally oil-resistant
  • No retensioning necessary

The Continental Contitech elastic ribbed belts are self-tensioning which cuts drive costs considerably.

EME Part Number: Belt-4PK592841
BMW Part Number: 12 31 7 681 841
Model Year
HEXHEAD MODELS
HP2 Enduro (K25H) 08/04-08/06 ECE
HP2 Enduro (K25H) 08/04-08/06 USA
HP2 Megamoto (K25H) 08/06-11/08 ECE
HP2 Megamoto (K25H) 08/06-11/08 USA
R1200GS (K25) 12/02-10/07 ECE
R1200GS 05-07 (K25) 03/03-09/07 USA
R1200R 05-10 (K27) 11/05-09/10 USA
R1200R 05-10 (K27) 11/05-10/10 ECE
R1200S (K29) 11/04-09/06 USA
R1200S (K29) 11/04-12/06 ECE
R1200ST (K28) 05/03-11/07 ECE
R1200ST (K28) 06/03-06/07 USA
OILHEAD MODELS
R850R (R28) 11/99-07/07 ECE
R850RT (R22) 06/00-02/06 ECE
R1100S (259S) 12/96-07/05 ECE
R1100S (259S) 01/97-09/04 USA
R1150GS (R21) 09/98-11/03 ECE
R1150GS (R21) 09/98-11/03 USA
R1150GS ADV (R21A) 07/01-09/05 ECE
R1150GS ADV (R21A) 07/01-09/05 USA
R1150R (R28) 11/99-06/06 ECE
R1150R (R28) 03/00-02/06 USA
R1150R Rockster (R28) 03/02-07/05 ECE
R1150R Rockster (R28) 03/02-07/05 USA
R1150RS (R22) 11/00-11/04 ECE
R1150RS (R22) 11/00-01/04 USA
R1150RT (R22) 01/00-03/06 ECE
R1150RT (R22) 02/00-02/06 USA

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Michael McElya

Alternator Belt - BMW Oilhead, Hexhead - 592mm; 12 31 7 681 841 / Continental Contitech