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What Does the "Code 18" Message Mean in the Opel Astra and How to Remove It?

Model: Vauxhall Astra Astra G - Years: 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
Part: Warning light – error code

See other generations:
Video tutorial

If the "Code 18" message appears on the instrument panel of your Opel Astra, it means that the left dipped beam bulb is faulty. To resolve the issue, simply replace the bulb with a spare of the same specifications.

This is a very simple and quick operation; let's see how to proceed in this tutorial. First, ensure that the key is not inserted, then open the bonnet, locate the relevant bulb holder, and rotate it 90 degrees counterclockwise to remove it from the headlamp.

At this point, disconnect the old bulb, connect the replacement, and follow the reverse procedure.


Updated on 14 October 2026 by ScegliAuto


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    Frequently Asked Questions

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    • Astra 2009-2016 - What does fault code 54 mean on the Opel Astra version J? Read answer
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    • Astra 2004-2010 - What does error 68302 mean on the dashboard of the Opel Astra H? Read answer
    • Astra 2004-2010 - Where can I find the list of error codes for the Opel Astra? Read answer
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    • Astra 2015-2022 - What does code 21 mean on the Opel Astra? Read answer
    • Astra 1998-2006 - What does the Code 22 of the Opel Astra mean? Read answer
    • Astra 2009-2016 - What does code error 84 mean on Opel Astra? Read answer
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How to Remove the Toll Tag Holder from the Car Windscreen

The toll tag holder is usually attached to the car windscreen to ensure that the toll tag functions immediately when passing through barriers. However, if you decide to remove the holder, you should follow this procedure: - Insert the toll tag into the holder; - Pull the holder inwards to detach it from the windscreen; you can use a glass scraper or a stiff plastic card to assist you; After removing the holder, it is essential to remove the adhesive from the windscreen. To remove the adhesive, we recommend using a solvent-based spray that will remove the glue without clouding the area.

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by ScegliAuto

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