Standard Ignition HZS221 Door Lock Switch

BMW Door Lock Switch Replacement

Restore door lock and window lock control with this Standard Ignition door lock switch, part number HZS221. It is a 12V illuminated switch with a black finish and snap-fit attachment for select BMW models, including BMW 325Ci, 330Ci, M3, X5, and Z4 applications.

Key Features

• Standard Ignition HZS221 door lock switch for interior electrical repair
• 12V illuminated design for improved visibility in the cabin
• Black plastic housing with brass, rubber, and plastic finish materials
• Snap-fit attachment method for direct replacement-style installation
• Female rectangular connector with 6 male pin terminals
• Two-switch design with window lock included
• OE cross-reference: Genuine 61318368920

Detailed Description

The Standard Ignition HZS221 is a replacement door lock switch built for BMW interior switch applications where lock and window lock control are integrated into the driver or passenger door panel. This illuminated 12V switch uses a single rectangular female connector and 6-pin male terminals, with no wiring harness included. It is a direct-fit electrical component for BMW 323Ci, 323i, 328Ci, 328i, 320i, 325i, 325xi, 330i, 330xi, 325Ci, 330Ci, M3, X5, and Z4 models across the listed years.

This part cross-references Genuine 61318368920 for the same application. The HZS221 part number is also referenced as HDS221, HSW221, and SW9321.

What It Helps Fix

• Inoperative door lock switch response
• Intermittent or failed illuminated switch operation
• Broken or worn interior switch contacts
• Window lock control issues at the door panel
• Cracked, faded, or non-functioning BMW door switch assembly

Installation Notes and Tips

Verify connector shape, terminal count, and vehicle application before installation. This switch uses snap-fit attachment and a female rectangular connector, so the existing door panel opening and electrical plug should match the original layout. Confirm the BMW model year and trim against the fitment list before replacing the switch.

Quality Assurance

Standard Ignition supplies replacement electrical components for automotive repair, and this switch is built to match the listed OE-style application details for proper fit and function.