BMW E83 X3 2.5i DISA Valve
The symptoms are annoying. The costs can be painful.
DISA valves control intake manifold runner length to improve engine performance at different rpm. When they fail, the DISA valve bangs around in its housing, making a rattling noise accompanied by rough idle and off-idle hesitation.
If your BMW experiences these symptoms, don't wait to fix it. In some cases, parts of the DISA--including a metal spreader pin--can be sucked into your engine, causing serious engine damage.
Minor Fix - Major Savings
Fits BMW:
E83 X3 2.5i 2004-2006.
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