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Unity 30-540000-HD Air Spring to Coil Spring Conversion Kit - Rear
Overview of Unity Heavy Duty Air Spring Conversion Kit
The Unity Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit (part number 30-540000-HD) offers a reliable, economy-grade solution for rear suspension upgrades. Designed for select Ford, Lincoln, and Mercury vehicles from 2003 to 2011, this kit provides a low-cost alternative to air suspension systems.
- Compatible with Ford Crown Victoria, Lincoln Town Car, Mercury Marauder, and Grand Marquis models
- Rear position conversion from electronic air springs to passive coil springs
- Economy product grade for cost-effective suspension repair
- Fits model years 2003 through 2011
- Part number 30-540000-HD for precise identification
Product Line Details: Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit
This product is part of Unity's Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit line, designed specifically to convert electronic air suspension systems to passive coil spring setups. This line targets vehicles equipped with electronic air springs that require a durable and straightforward conversion to coil springs, providing a practical alternative to maintain rear suspension performance without the complexity of air suspension components.
Detailed Product Description
The 30-540000-HD conversion kit is engineered to replace the rear electronic air springs on select Ford Crown Victoria, Lincoln Town Car, Mercury Marauder, and Grand Marquis models with passive coil springs. Covering model years from 2003 to 2011, this kit addresses the common need for a cost-effective suspension solution. By switching to coil springs, vehicle owners can avoid the higher maintenance and repair costs associated with air suspension systems while maintaining reliable rear suspension support.
Common Applications and Problem Solving
- Eliminates issues related to failing electronic air springs
- Reduces maintenance costs associated with air suspension components
- Provides a stable rear suspension setup for vehicles with worn or damaged air springs
- Prevents air compressor and sensor failures linked to air suspension systems
- Offers a straightforward upgrade path for vehicles with problematic air suspension
Installation Notes and Tips
Installation of the 30-540000-HD kit requires removal of the existing electronic air springs and associated components. It is recommended to have the vehicle securely lifted and supported before beginning work. Basic mechanical skills and standard suspension tools are necessary. Follow all manufacturer instructions carefully to ensure proper fitment and safety. This kit is designed specifically for rear suspension use on compatible Ford, Lincoln, and Mercury models.
Quality Assurance and Warranty
Unity provides this conversion kit as an economy-grade product, offering a practical and durable solution for rear suspension conversion. While specific warranty details are not provided, Unity products typically meet industry standards for fit and function. Buyers should verify warranty terms with the distributor or installer prior to purchase.
| Brand | Unity |
|---|---|
| Part Number | 30-540000-HD |
| Position | Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit, Rear |
| Max Year Covered | 2011 |
| Min Year Covered | 2003 |
| Most Popular Make / Model | Ford Crown Victoria |
| Most Popular Year | 2003 |
| Position | Rear |
| Product Grade | Economy |
| Special Note | Low Cost Alternative To Air Suspension |
| Total Part VIO | 669540 |
This part fits 68 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2011 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2011 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2011 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2010 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2010 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2010 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2009 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2009 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2009 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2008 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2008 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2008 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2007 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2007 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2007 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2006 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2006 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2006 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2005 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2005 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2005 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2004 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2004 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2004 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2004 | Mercury | Marauder | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2003 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2003 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2003 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2003 | Mercury | Marauder | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2002 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2002 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2002 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2001 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2001 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2001 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2000 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2000 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 2000 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1999 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1999 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1999 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1998 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1998 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1998 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1997 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1997 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1997 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1996 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1996 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1996 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1995 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1995 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1995 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1994 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1994 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1994 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1993 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1993 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1993 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1992 | Ford | Crown Victoria | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1992 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1992 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1991 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1991 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1990 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1990 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1989 | Lincoln | Town Car | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
| 1989 | Mercury | Grand Marquis | Rear | Includes (2) Springs (4) Rubber Isolators Converting Air/Electronic Suspension to Standard Suspension; Heavy Duty; For Commercial Use; Heavy Duty Electronic to Passive Air Spring to Coil Spring Conversion Kit |
* 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:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.