Standard auto policies cover OEM (factory) parts, not aftermarket upgrades — unless you specifically add coverage. Custom parts and equipment (CPE) coverage is an add-on that covers wheels, body kits, spoilers, custom paint and similar upgrades, typically up to $1,000–$5,000 (higher limits available from specialist carriers). Disclose all modifications to your insurer — undisclosed mods can void your claim, and in some cases your entire policy, if the insurer argues misrepresentation.
Aftermarket modification insurance at a glance
| Modification type | Covered by standard policy? | Solution | Typical extra cost |
|---|---|---|---|
| Aftermarket alloy wheels | No (only OEM value) | Custom parts & equipment (CPE) add-on | $20–$100/year |
| Body kits and spoilers | No | CPE add-on | $20–$100/year |
| Custom paint / wraps | No (or only factory value) | CPE or agreed-value policy | Varies |
| Lift/lowering kits | May void standard coverage | Specialist modified-car insurer | Varies significantly |
| Performance wheels affecting handling | May raise premiums | Disclose and discuss with insurer | +10–30% on collision |
What standard policies cover — and what they don't
A standard auto insurance policy pays to restore your car to its pre-accident condition — meaning factory (OEM) specification. If you've replaced the stock 17-inch steel wheels with $3,000 forged alloys and someone smashes into your car, the insurer will value a replacement at the OEM wheel's cost — which might be $400 total. The remaining $2,600 is your loss unless you have the right coverage in place.
This gap applies to any upgrade that isn't part of the manufacturer's standard specification for that trim level, including:
- Aftermarket alloy or forged wheels (and their associated tyre choices).
- Front splitters, rear diffusers, side skirts, bonnet vents and other body kit components.
- Spoilers and wings beyond any factory option.
- Custom paint, vinyl wraps or liveries.
- Wide-body conversions and flared arches.
- Tinted windows not factory-fitted.
Custom parts and equipment (CPE) coverage
Most mainstream insurers offer custom parts and equipment (CPE) coverage as an affordable add-on to a standard policy. It extends your comprehensive and collision coverage to include the aftermarket value of specified modifications, up to a per-item or total-limit cap.
Key things to know about CPE:
- Coverage limits: standard CPE add-ons typically cover $1,000–$5,000 in modification value. If your wheels alone cost $4,000, check whether one limit covers all mods or whether there are per-item caps.
- Documentation matters: keep receipts and photographs of all modifications. Claims without documentation are routinely underpaid.
- Timing: add CPE before any incident — retrofitting coverage after a theft or accident won't help.
- Permanent vs removable mods: some policies only cover permanently attached modifications. Removable items (a set of track wheels you swap in) may need a separate policy or rider.
When standard CPE isn't enough
If your modification spend is significant — say, $10,000+ on a widebody conversion and custom wheels — mainstream CPE limits won't cover the full value. Specialist modified-car insurers (including Hagerty, American Collectors and certain Lloyd's-backed policies) offer agreed-value policies with higher modification limits, where you and the insurer agree upfront on the total value of the car including all mods. This is especially useful for show cars, heavily customised builds and track-day vehicles.
Body kits and aerodynamics: the safety angle
Aerodynamic body kits aren't purely cosmetic in the insurer's view — they can affect how the car handles in a crash (front splitters, for example, change crumple zones and pedestrian-impact geometry). Some insurers will raise collision premiums for body kits because repair costs are higher and parts are harder to source. Others are indifferent. The only way to know is to disclose and ask.
Insurers are entitled to void a policy or deny a claim if they discover material information was withheld at application. If you fit a body kit, change your wheels or make any significant cosmetic modification, call your insurer and tell them. The premium change is usually minor; the claim risk of non-disclosure is enormous.
Theft risk and aftermarket wheels
High-end aftermarket alloys are a target for wheel thieves. In areas with elevated wheel theft, adding aftermarket wheels to your comprehensive cover is even more important — and worth pairing with physical security measures (locking wheel nuts, parking in well-lit areas) to keep your comprehensive premiums from being pushed up at renewal.
Frequently asked questions
Are aftermarket wheels covered by standard car insurance?
What is CPE coverage?
Will a body kit raise my insurance premium?
What if my modification spend exceeds standard CPE limits?
Do I need to tell my insurer about every modification?
Sources & further reading
Figures, prices and policy details were current at the last-updated date above. Automotive pricing, incentives and regulations change frequently — verify time-sensitive details with the linked primary sources. Read our editorial policy and fact-checking standards.
