Opel Signum (2003-2008): How to Remove the Bumpers

The Opel Signum (Vauxhall Signum) is a "business wagon" produced between 2003 and 2008. After the 2005 facelift, the model received minor visual updates while retaining its unique concept.

Model Update History

  • 2003 - Debut at the Geneva Motor Show. First production models rolled off the assembly line in June of that year.

  • 2005 - First major update:

    • Front-end redesign (new radiator grille)

    • Introduction of the top-tier Ultra version with Alcantara

    • Engine range refresh

  • 2006 - Technical improvements:

    • Enhanced sound insulation

    • New interior trims

    • Expanded equipment list

  • 2007 - Final changes before production ended:

    • New color options

    • Simplified engine lineup

Main Model Versions

The Opel Signum was available in several trim levels:

  • Signum Edition (2003-2008) - Base version

  • Signum Elegance (2003-2006) - Comfort trim

  • Signum Cosmo (2004-2008) - Top version

  • Signum Ultra (2005-2007) - Limited edition

  • Signum OPC Line (2006-2008) - Sport version

Mounting points may vary depending on model year and version.

Bumper material: Polypropylene + ethylene propylene diene terpolymer with 20% mineral filler. Marked >PP-EPDM-TV20<

Front Bumper Removal

 

  1. Open the hood.

  2. Under the hood:

    • 2003-2005: Remove two clips securing the top of the bumper.

    • 2005-2008: Unscrew four bolts securing the top of the bumper (near the grille).

  3. Underside:

    • Remove four clips securing the bottom of the bumper (inserted bottom-up). Be prepared to replace these clips as they often break.

  4. Wheel arches:

    • 2003-2005: Unscrew three bolts per side securing the wheel liners. Release the catches in the fenders by gently pulling the bumper toward you.

    • 2005-2008: Unscrew two bolts per side securing the wheel liners and bumper corners to the fender brackets. Use a screwdriver to press the retractable bracket fasteners (where the top bolts were). Release the sides from the fender clips.

  5. With an assistant, remove the bumper by pulling it forward. Caution: Don't damage any wires or hoses!

  6. Disconnect the temperature sensor, fog lights, and parking sensor connectors.

  7. If headlight washers are installed, disconnect the water hoses.

Opel Signum (2003-2005) front bumper mounting locations

Opel Signum (2005-2008) front bumper mounting locations

Front bumper mounting diagram Opel Signum (2003-2008)

Rear Bumper Removal

⇒Useful tips on how to remove the bumper and not break anything.⇐

  1. Open the trunk.

  2. In the trunk opening:

    • Unscrew four bolts securing the top of the bumper.

  3. Rear wheel arches:

    • Unscrew three bolts per side securing the wheel liners and bumper corners to the fender brackets.

  4. Underside:

    • Release two plastic fasteners and (if present) remove five clips.

  5. Release the catches in the fenders and under the taillights.

  6. With an assistant, remove the bumper by pulling it backward. Don't forget to disconnect the parking sensor wiring.

mounting points of the rear bumper Opel Signum (2003-2008)

Rear bumper mounting diagram Opel Signum (2003-2008)

Interesting Facts About the Opel Signum (2003-2008)

For those who appreciate cars with character, the Opel Signum 2003-2008 deserves attention. It wasn't just a sedan, but an experiment combining business-class comfort, wagon practicality, and premium innovations. Unfortunately, the market didn't embrace it, but today it's considered an underrated model.

Why Production Ended in 2008:

  • Declining sales after 2005

  • Opel's strategy shift

  • New competitors

  • Economic crisis

Notable Details:

  • After the 2005 facelift, prices increased by 7-10%

  • Rarest examples: 2008 models

  • The 3.2 V6 version was discontinued after 2006