If a worn or damaged hazard button is why your BMW's hazard flashers won't respond, this Standard Ignition switch, part number HZS221, is designed to take its place. It installs as a direct-fit replacement on a wide range of BMW models, among them the 2003-2008 BMW Z4, 2001-2006 BMW 325Ci and 2001-2006 BMW 330Ci. It is cataloged as both a Hazard Warning Switch and a Door Lock Switch.
Signs this switch may need replacing include a hazard button that does nothing when pressed, flashers that work only intermittently, or flashers that won't switch off. Other parts of the hazard circuit can cause these symptoms, so diagnose the cause before replacing the switch.
See the "Vehicles it fits" section for complete application details.
Interchange: 61318368920 · HDS221 · SW9321 · HSW221
This part cross-references / interchanges with the following part numbers:
What does the Standard Ignition HZS221 switch do?
It is an electrically operated hazard warning switch that turns the vehicle's hazard flashers on and off. It is cataloged under both the Hazard Warning Switch and Door Lock Switch names.
Which vehicles does the HZS221 fit?
It fits a range of BMW models, including the 2003-2008 BMW Z4, 2001-2006 BMW 325Ci and 2001-2006 BMW 330Ci. See the "Vehicles it fits" section for the full list.
What are signs my hazard warning switch may be failing?
Signs include a hazard button that does nothing, flashers that work only intermittently, or flashers that won't turn off. Other parts of the circuit can cause these symptoms, so diagnose the cause before replacing the switch.
What are the switch's conductors made of?
The switch uses copper alloy conductors, which provide strong electrical conductivity with low resistive losses.
Which part numbers does the HZS221 replace?
It interchanges with 61318368920, HDS221, SW9321 and HSW221.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
