A CNG conversion changes the insured vehicle's fuel system and should be disclosed to the insurer. The documents and cover offered can differ between policies, vehicle classes and jurisdictions, so owners should confirm current requirements in writing.
This guide explains product and selection principles. It does not confirm compatibility, replace model-specific documents or provide a repair procedure.
Tell the insurer before relying on cover
Contact the insurer when planning the conversion and again after installation if requested. Provide accurate details of the kit, fitter, invoice and registration update rather than waiting until a claim occurs.
Ask the insurer to issue the appropriate policy endorsement and check the revised schedule for errors.
Keep the registration and fitment records together
Commonly requested evidence may include the updated RC, fitment certificate, invoice and kit or cylinder particulars. The exact list is set by the insurer and transport authority, so verify it for the vehicle's registration location.
Understand what is and is not covered
Do not assume the fuel system automatically receives the same protection as every factory-fitted part. Ask how the conversion affects the insured declared value, own-damage cover, third-party cover, deductibles and exclusions.
Commercial use, passenger use and goods carriage can also affect underwriting and should be declared accurately.
Make a claim with complete evidence
After an incident, prioritise safety, notify the insurer promptly and preserve photographs, repair estimates and conversion records. Follow the survey and repair authorisation process stated in the current policy rather than dismantling the system prematurely.