Shop By Category
SPRINTER GEN. I 2002-2006 (T1N)
SPRINTER GEN. II 2007-2018 (NCV3)
SPRINTER GEN. III 2019-2024 (VS30)
METRIS 2016-2023
EUROVAN 2001-2003
EUROVAN 1997-2000
EUROVAN 1992-1996
Shop By Category
Brake Calipers & Pads
2004-06 Turbo Resonator
2007-on Turbo Hose Adapter
A/C Warranty Info
Turbo Warranty Info
Serpentine Belt Tensioner Assembly 2002-2006
View Larger

Serpentine Belt Tensioner Assembly 2002-2006

Original Litens brand, spring loaded tensioner assembly with smooth roller.

The roller/pulley itself,  is also available as a separate unit, WITHOUT the spring loaded tensioner. SEE BELOW...

These units are manufactured by Litens, the original factory supplier to Mercedes Benz and this unit is the identical tensioner sold at a Mercedes, Dodge or Freightliner dealer.  Many other brands have been known to break off at the pivot arm, due to an inadequate and/or poor design.
Part Number:  646 200 05 70-ASSEMBLY
Dealer List  $174.19
Europarts Price:
Savings:$114.48 (66%)
Detailed Description
Sprinter 2002-2006

Please note that there are two options when installing a belt with this unit. You can use either a 12 point 17 mm box wrench/socket or a T-60 Torx head when installing the serpentine belt.

If you have had premature failures of this tensioner or the serpentine belt has broken or been thrown, you most likely have a failed alternator pulley.  The alternator pulley is a decoupling pulley and has a one-way clutch mechanism to minimize belt flutter.  Belt flutter places stress on the entire belt drive system and the tensioner acts as a spring-loaded shock absorber.  If the decoupling pulley has seized, it will greatly shorten the life of the belt tensioner and often causes the pulley to break off or a fracture of the pulley arm.  Replace the alternator pulley or the alternator to solve this problem.

Video demonstration of why the decoupling pulley is a critical component: http://www.youtube.com/watch?v=4EXYP1CmL9Q&feature=relate

Recommend this Item to a Friend

Related Products
Crankshaft Pulley/Vibration Damper-Standard A/C 2002-2006
Water Pump Pulley OM647 Diesel 2004-2006
Serpentine Belt Idler Pulley-Large 2002-2003
Serpentine Belt Idler Pulley-Large 2004-2006
Serpentine Belt Idler Pulley-Grooved 2002-2006
Serpentine Belt Idler Pulley-Smooth 2004-2006
Belt Tensioner Pulley-Aux. A/C Compressor 2002-2006
Crankshaft Pulley- Woodruff Key  2002-2006
Water Pump-New 2002-2003 Sprinter
Water Pump-New 2004-2006
Serpentine Belt  2002-2003 Sprinter
Serpentine Belt  2004-2006 Sprinter