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Valve springs wear out over time and lose their tension. This can allow the valve to "float" - stay open longer and not close quick enough. Cars that see a lot of track time or extended high RPM should have their valve springs (and retainers and keepers) replaced regularly. This is the stock valve spring for non-M E36 323is/328i, E46 323i/325i/328i/330i, E39 525i/528i/530i, E60 525i/530i, X3 2.5i/3.0i, X5 3.0i, Z3, and Z4 2.5i/3.0i.
BMW Fitments:
3 Series E36 (92-99) > 323ic E36 (92-99) > 323is E36 (92-99) > 328i E36 (92-99) > 328ic E36 (92-99) > 328is
3 Series 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
5 Series E39 (97-03) > 525i E39 (97-03) > 528i 99-00 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 (2004-2005) E83 X3 (04-10) > X3 3.0i M54 (2004-2006)
X5 Series E53 X5 (00-06) > X5 3.0i M54
Z Series E36/7 / E36/8 Z3 (96-02) > Z3 2.3 E36/7 / E36/8 Z3 (96-02) > Z3 2.5 E36/7 / E36/8 Z3 (96-02) > Z3 2.8 97-98 E36/7 / E36/8 Z3 (96-02) > Z3 2.8 99-00 E36/7 / E36/8 Z3 (96-02) > Z3 3.0
Z Series E85 / E86 Z4 (03-08) > Z4 2.5i M54 E85 / E86 Z4 (03-08) > Z4 3.0i M54
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$16.25
Valve Spring, BMW - E36, E39, E60, X3, X5, Z3, Z4, M52, M52TU, M54, M56
Critical piece of the valve train should be replaced during head rebuilds. Replaces BMW part #11347504268.
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