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This is the replacement hydraulic tensioner for the main drive belt on M50, M52, M52TU, M54, and S54 engines. This is the only the tensioner itself, not the complete assembly, but can be replaced on its own. The tensioner is like a small shock absorber that maintains pressure on the belt. A loose belt will cause insufficient charging from the alternator, poor cooling performance from the water pump, and stiffer steering from lower power steering pump output. It might also lead to the belt slipping from the pulleys or premature belt wear.
This tensioner is manufactured by INA, the original supplier to BMW for this part and other engine components. Since it is an OEM part, it conforms to the original design that BMW specified for the engines listed above. It comes with a two year warranty.
BMW Fitments:
3 Series E36 (92-99) > 323ic E36 (92-99) > 323is E36 (92-99) > 325i E36 (92-99) > 325ic E36 (92-99) > 325is E36 (92-99) > 328i E36 (92-99) > 328ic E36 (92-99) > 328is E36 (92-99) > M3 (1995) E36 (92-99) > M3 (96-99) 3 Series E46 (99-05) > 320i E46 (99-05) > 323Ci E46 (99-05) > 323i E46 (99-05) > 325Ci E46 (99-05) > 325i E46 (99-05) > 325xi E46 (99-05) > 328Ci E46 (99-05) > 328i E46 (99-05) > 330Ci E46 (99-05) > 330i E46 (99-05) > 330xi E46 (99-05) > M3 5 Series E34 (89-95) > 525i M50 5 Series E39 (97-03) > 525i E39 (97-03) > 528i E39 (97-03) > 530i 5 Series E60 / E61 (04-10) > 525i M54 (2004-2005) E60 / E61 (04-10) > 525i N52 (2006-2007) E60 / E61 (04-10) > 530i M54 (2004-2005) E60 / E61 (04-10) > 530i N52 (2006-2007) X3 Series E83 X3 (04-10) > X3 2.5i M54 (2003-2005) E83 X3 (04-10) > X3 3.0i M54 (2003-2006) X5 Series E53 X5 (00-06) > X5 3.0i M54 Z Series E36/7 / E36/8 Z3 (96-02) > Z3 2.8 E36/7 / E36/8 Z3 (96-02) > Z3 M - S52 E36/7 / E36/8 Z3 (96-02) > Z3 M - S54 Z Series E85 / E86 Z4 (03-08) > Z4 M
$61.99
Main Belt Hydraulic Tensioner, OEM - E36, E46, E39, Z4, M50, M54, S52, S54
Keep your belts at the proper tension and alignment
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