Customising your car can be exciting. Whether it’s upgraded rims, performance enhancements, sound systems, body kits or cosmetic styling, vehicle modifications are a popular way for drivers to personalise their cars.
But before making changes to your vehicle, it’s important to understand how modifications may affect your car insurance policy.
Many drivers don’t realise that certain upgrades and aftermarket accessories could influence premiums, claims and cover limits. In some situations, failing to inform your insurer about modifications could even affect a future claim.
In this guide, we explain what counts as a car modification, how modifications may affect your car insurance and what you should know before upgrading your vehicle.
A car modification is generally any change made to a vehicle that differs from the manufacturer’s original specification.
This may include:
Some modifications are cosmetic, while others affect performance, handling or vehicle value.
Even smaller changes may still need to be disclosed to your insurer.
Vehicle modifications can increase risk in different ways.
Certain modifications may:
Because insurers assess risk carefully, modifications may affect how your policy is priced and structured.
Yes, in many cases modifications can increase your premium.
For example:
The impact depends on:
Not all modifications automatically increase premiums significantly, but insurers still need to know about them.
One of the biggest mistakes drivers make is assuming cosmetic upgrades don’t need to be disclosed.
Undeclared modifications can create complications during claims.
For example:
That’s why transparency matters when updating your vehicle.
Performance Modifications
Performance upgrades often carry higher risk because they may affect speed, acceleration or handling.
Examples include:
These modifications may increase premiums more noticeably than cosmetic changes.
Cosmetic Modifications
Cosmetic upgrades generally focus on appearance rather than performance.
Examples include:
Even cosmetic changes can affect vehicle value and theft risk.
Safety Modifications
Some upgrades are designed to improve safety or security.
Examples include:
Certain safety features may positively influence risk assessments depending on the insurer.
Yes. Expensive aftermarket accessories should generally be disclosed to your insurer.
This may include:
If these items are not listed on your policy, they may not automatically be covered during theft or accident claims.
Drivers with modified vehicles often choose broader cover because of the increased value associated with upgrades and accessories.
You can explore comprehensive car insurance options that may help protect vehicles against:
However, policy terms, exclusions and cover limits may differ depending on the modifications involved.
If you modify your vehicle:
Being proactive helps avoid confusion later if you need to claim.
In many cases, yes.
Modified vehicles may:
These additional repair costs are one reason insurers may adjust premiums for heavily modified vehicles.
Before making upgrades, ask yourself:
Planning ahead can help you avoid unexpected costs later.
Drivers sometimes unintentionally create insurance problems by:
Keeping your insurer updated helps ensure your policy reflects your vehicle accurately.
Do I need to tell my insurer about car modifications?
Yes. Most insurers require drivers to disclose modifications that affect vehicle value, appearance or performance.
Will modifications increase my car insurance premium?
They can. The impact depends on the type of modification, theft risk, repair costs and overall risk profile.
Are aftermarket accessories automatically covered?
Not always. Certain accessories may need to be specified separately on your policy.
Can undeclared modifications affect claims?
Yes. Undeclared modifications could create complications during claims assessments and may affect cover outcomes.
What modifications affect insurance the most?
Performance upgrades such as engine tuning, suspension modifications and turbo upgrades may carry higher insurance risk.
Is comprehensive car insurance better for modified vehicles?
Many drivers choose comprehensive car insurance because it may provide broader protection for vehicles with added value or accessories.
Vehicle customisation can be a great way to personalise your car, improve comfort or enhance performance. But every modification potentially changes the vehicle’s risk profile and value.
Understanding how modifications affect your policy can help you avoid unexpected surprises during claims and ensure your vehicle remains properly protected.
Before upgrading your car, review your cover carefully and make sure your insurer has the correct information about your vehicle.
You can explore flexible car insurance options designed to suit different vehicles, lifestyles and driving needs.
