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Part #: US-678

Standard Ignition US-678 Ignition Switch

⚙️ 80 vehicles fit this part
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: BMW, X3, Z4, 325Ci, 330Ci, 330i, 330xi, M3, 320i, 325i, 325xi, 525i, X5, 323Ci, 323i, 328Ci, 328i, and 528i
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Overview of Standard Ignition US-678 Ignition Switch

The Standard Ignition US-678 ignition switch is designed for reliable performance in various BMW models. Featuring a black plastic face and snap fit attachment, this ignition switch ensures secure installation and consistent operation for your vehicle's ignition system.

  • Black face color with durable plastic finish
  • Snap fit attachment method for easy installation
  • Female square connector with one connector quantity
  • Column mounting location for direct fit
  • Nine male terminals with pin and bullet terminal types

Detailed Product Description

This ignition switch from Standard Ignition is engineered to meet the specific requirements of BMW vehicles including the 320i, 323Ci, 325i, 328i, 330i, 525i, 528i, 540i, M3, X3, X5, and Z4 models. The part number US-678 features a black plastic face that resists wear and blends seamlessly with the vehicle’s interior. Its snap fit attachment method allows for a secure and straightforward installation on the steering column. The switch includes a single female square connector and nine male terminals configured as pin and bullet types, ensuring proper electrical connectivity and compatibility with the vehicle’s wiring harness.

Common Applications and Issues Addressed

  • Replacement for faulty or worn ignition switches in compatible BMW models
  • Resolves ignition key turning difficulties or failure to start
  • Eliminates intermittent electrical connection problems in the ignition system
  • Addresses issues with ignition switch locking or unlocking
  • Restores proper electrical signal flow to starter and accessory circuits

Installation Notes and Tips

  • Ensure the vehicle battery is disconnected before installation to prevent electrical shorts
  • Verify the snap fit attachment securely locks the switch in place on the steering column
  • Confirm connector orientation matches the female square connector on the vehicle harness
  • Check all nine terminals for proper seating and connection to avoid electrical faults
  • Consult the vehicle’s service manual for specific removal and installation procedures

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications for fit, form, and function. The US-678 ignition switch undergoes rigorous quality control to ensure durability and reliable performance in BMW vehicles. Warranty coverage details should be confirmed with the product documentation or supplier.

BrandStandard Ignition
Part NumberUS-678
Attachment MethodSnap Fit
ColorBlack
Connector GenderFemale
Connector ShapeSquare
FinishPlastic
Mounting LocationColumn
Terminal GenderMale
Terminal TypePin; Bullet

This part fits 80 vehicles. Search below:

YearMakeModelBody TypeTransmissionLitersCylindersPositionNotes
2010BMWX3N/A
2009BMWX3N/A
2008BMWX3N/A
2008BMWZ4N/A
2007BMWX3N/A
2007BMWZ4N/A
2006BMW325CiN/A
2006BMW330CiN/A
2006BMW330iN/A
2006BMW330xiN/A
2006BMWM3N/A
2006BMWX3N/A
2006BMWZ4N/A
2005BMW320i2.2LL6N/A
2005BMW325CiN/A
2005BMW325i2.5LL6N/A
2005BMW325xiN/A
2005BMW330CiN/A
2005BMW330iN/A
2005BMW330xiN/A
2005BMWM3N/A
2005BMWX3N/A
2005BMWZ4N/A
2004BMW320iN/A
2004BMW325CiN/A
2004BMW325iN/A
2004BMW325xiN/A
2004BMW330CiN/A
2004BMW330iN/A
2004BMW330xiN/A
2004BMWM3N/A
2004BMWX3N/A
2004BMWZ4N/A
2003BMW325CiN/A
2003BMW325iN/A
2003BMW325xiN/A
2003BMW330CiN/A
2003BMW330iN/A
2003BMW330xiN/A
2003BMW525iN/A
2003BMW540iManualN/A
2003BMWM33.2LL6N/A
2003BMWX5N/A
2003BMWZ4N/A
2002BMW325CiN/A
2002BMW325iN/A
2002BMW325xiN/A
2002BMW330CiN/A
2002BMW330iN/A
2002BMW330xiN/A
2002BMW525iN/Aw/ Touring Package
2002BMW540iManualN/A
2002BMWM33.2LL6N/A
2002BMWX5N/A
2001BMW325CiN/A
2001BMW325iN/A
2001BMW325xiN/A
2001BMW330CiN/A
2001BMW330iN/A
2001BMW330xiN/A
2001BMW525iN/ANot compatible with vehicles equipped with Auto Headlights
2001BMW540iManualN/A
2001BMWM33.2LL6N/A
2001BMWX5N/A
2000BMW323CiN/A
2000BMW323i2.5LL6N/A
2000BMW328CiN/A
2000BMW328iN/A
2000BMW528iManualN/A
2000BMW540iManualN/A
2000BMWX5N/A
1999BMW323iN/A
1999BMW328iSedanN/A
1999BMW528iN/A
1999BMW540iManualN/A
1998BMW528iN/A
1998BMW540iManualN/A
1997BMW323i2.5LL6N/A
1997BMW528iN/AFrom 3/97
1997BMW540iManualN/AFrom 3/97

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

18-01691S5948201-270653-2734061326901961CS1038KS7034LS1044V20-80-1602

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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