Your $5,000 Honda Civic is only a new exhaust, some coil-overs and a sound system away from becoming a $10,000 Honda Civic.

Without the right kind of car insurance coverage, you’ll get only enough money to replace it with a stock version if you total your tuned ride.

A well-modded car is a work of art. It looks right. It sounds right. It goes right. But an everyday car that’s come to life with the application of hundreds of hours and thousands of your dollars is still just an everyday car to your insurance company.

Here’s how to decide whether you need to go the extra mile. Below are answers to some of the most common questions on aftermarket parts insurance.

Written by:
Laura Longero
Executive Editor
Laura is an award-winning editor with experience in content and communications covering auto insurance and personal finance. She has written for several media outlets, including the USA Today Network. She most recently worked in the public sector for the Nevada Department of Transportation.

What are aftermarket parts?

If you replace parts on your vehicle, you usually have two options: aftermarket parts or original equipment manufacturer (OEM) parts.

OEM parts are precisely what they sound like, parts made by the vehicle manufacturer. These parts are usually the most expensive option.

Aftermarket parts are also sometimes called performance parts but are not made by the vehicle manufacturer. These parts are usually the most budget-friendly. But are there any car insurance implications to using aftermarket parts?

Does insurance cover aftermarket parts?

If you have a liability-only policy — the very cheapest, bare-bones policy — you have zero coverage on your vehicle. All you have is some protection from lawsuits if you hit someone.

To have your car repaired or replaced, you have to buy collision and comprehensive insurance. Collision fixes physical damage to your own car when you hit something (or someone who is uninsured hits you). Comprehensive covers theft and damage from flooding, hail, falling objects, vandalism and animal strikes. Both of them will pay the actual cash value of your car if it’s totaled. But the actual cash value of your car is the cost to replace it with one similar to what you were insuring.

With some insurance companies, collision and comprehensive coverage will automatically include some small amount for aftermarket parts, typically $1,000. Even so, it’s still a good idea to take photos and keep receipts for your improvements.

With other policies, no aftermarket parts are covered.

If you’ve added a lot of aftermarket parts and haven’t bought special coverage, you’re not covered. If a thief steals your 22s, you’re rolling on factory steelies when the insurance check comes in.

If your car is financed, your mods aren’t covered by gap insurance.

What do I need for aftermarket parts insurance coverage?

Coverage for custom parts and equipment (CPE) — that’s how it’s known — isn’t particularly expensive, especially if you’re under 25 and already paying the highest rates you’ll see in your life. Most drivers will pay only a few monthly dollars for $5,000 coverage.

But you can’t buy CPE alone; you must also carry collision and comprehensive.

What is agreed-value or stated-value coverage and how is it used?

An agreed-value policy means you and your insurance company agree ahead of time precisely what the payout will be if your car is stolen or totaled. Your premium is based on that amount.

If you say your Honda Civic is worth $50,000, you will pay a premium reflecting that, and the insurance company will write you a check without any haggling.

Agreed-value policies are typically used for rare or one-of-a-kind custom cars, where a replacement is difficult or impossible to find. Owners of tuner cars that go much beyond bolt-on parts might consider such coverage.

A stated-value policy means you decide the value of your car. But unlike an agreed-value policy, you’re only buying as much coverage as you can afford rather than insuring the car for its worth. For example, if you have a classic car valued at $2 million but can only afford to pay for $1 million coverage, you would get a stated-value policy. These policies also typically have a provision that allows an insurer to pay out actual cash value instead if that amount is less.

FAQs: Car insurance for aftermarket parts

If the insurance company totals my car, who owns the aftermarket parts?

The insurance company usually does. The basic rule of thumb is that anything that was added to the car as a permanent fixture stays with the car and belongs to the auto insurance company once it totals out your car and pays you for it.

If there are custom parts that you would like to keep, discuss it with your claims adjuster to see if you can keep these specific items. There likely will be a deduction on the actual cash value you were to receive on the vehicle, and you may need to put the stock part back on the car. For example, if you want to keep an aftermarket stereo system, you may need to put back in the original stereo equipment.

Will modifying my car increase my risk and affect my insurance rates?

It can; it depends upon the modifications that you made. 

If you are an acceptable risk, the insurer may raise your rates to cover the extra performance of your vehicle. Or your insurer will suggest purchasing custom parts and equipment coverage for your aftermarket parts to be fully covered. And some modifications, such as an upgraded security system, could make your car less of a risk and thus reduce your rates.

If you modify your car in certain ways, you can become too much of a risk and instead of raising your rates, you’ll cancel your policy.  If you modify the car before asking your insurer about the parts, your policy could be voided.

If you want to add custom parts to your vehicle, especially ones that change the actual performance of your car, we’d recommend that you first check with your car insurance company to make sure these parts are acceptable under the terms of your policy. Ask if you need a custom parts and equipment endorsement to have them covered for an additional fee, or if the parts will affect your rates or policy in any other way.

If someone hits me, will their insurance company pay for my modifications?

Typically, your modifications will be replaced by stock parts if your car is damaged and its repairs are paid for by the other driver’s car insurance company. 

However, if you can prove that you had these custom parts listed on your auto insurance policy and they were covered either by your policy or through custom parts and equipment coverage, then you usually can get the other driver’s insurer to consider the parts. That’s because you have established value for them under your own policy.

If your car is totaled, modifications may be considered if you can show that they were covered by your auto insurance policy, and/or you may need to provide receipts to show their worth.

It’s possible, though, that your custom parts will not increase the value of your car as much as you’d expect. Just because they cost a lot and you enjoyed them on your car doesn’t necessarily mean they added any real amount to your car’s actual cash value.

Read more: Can I demand OEM parts when my vehicle is repaired?

Are there modifications that make a car uninsurable?

Yes, some modifications will keep a regular car insurance company from insuring your car. You may be able to find coverage with a specialized carrier, but that will cost you more money.

Each car insurance company has underwriting rules about what equipment is or is not acceptable, and it doesn’t share its list with the public. However, we can tell you that many car insurance companies find a vehicle unacceptable (uninsurable) if it has an altered suspension or any modification that mechanically or structurally alters its performance or appearance. 

Modifications for seasonal use of your car, such as snowplowing equipment, may also make your vehicle unacceptable to an auto insurance provider.  

Speak to your insurance company before modifying your car — or buying a car that has already been changed — to ensure you can get the insurance you need at a cost you can afford.

My car isn’t worth much, but the custom parts are; what should I do?

Check out the cost of physical damage coverage (collision and comprehensive coverages) and see which, if any, of your custom parts will be covered by it.  If your parts need a custom parts and equipment endorsement to be covered, find out the extra cost of that coverage. 

Once you know the cost of coverage, you can decide if it is worth paying that premium to have your car and custom parts covered by an auto insurance company. You may find that driving your vehicle with liability-only coverage makes more sense and accept that you’ll be out the money if your custom parts are damaged or the car is totaled.

Laura Longero

Ask the Insurance Expert

Laura Longero

Executive Editor

Laura is an award-winning editor with experience in content and communications covering auto insurance and personal finance. She has written for several media outlets, including the USA Today Network. She most recently worked in the public sector for the Nevada Department of Transportation.

John McCormick

Ask the Insurance Expert

John McCormick

Editorial Director

John is the editorial director for, and Before joining QuinStreet, John was a deputy editor at The Wall Street Journal and had been an editor and reporter at a number of other media outlets where he covered insurance, personal finance, and technology.

Leslie Kasperowicz

Ask the Insurance Expert

Leslie Kasperowicz

Managing Editor

Leslie Kasperowicz is an insurance educator and content creation professional with nearly two decades of experience first directly in the insurance industry at Farmers Insurance and then as a writer, researcher, and educator for insurance shoppers writing for sites like and and managing content, now at

Nupur Gambhir

Ask the Insurance Expert

Nupur Gambhir

Managing Editor

Nupur Gambhir is a content editor and licensed life, health, and disability insurance expert. She has extensive experience bringing brands to life and has built award-nominated campaigns for travel and tech. Her insurance expertise has been featured in Bloomberg News, Forbes Advisor, CNET, Fortune, Slate, Real Simple, Lifehacker, The Financial Gym, and the end-of-life planning service.

Please Enter Valid Question. Min 50 to max 250 characters are allowed. Only (& ? , .) charcters are allowed.
Please Enter Valid Email.
Error: Security check failed
Thank You, Your message has been received. Our team of auto insurance experts typically answers questions within five working days. Note that due to the volume of questions we receive, not all may be answered. Due to technical error, please try again later.
Compare top carriers in your area Get quotes near you!
Please enter valid zip
author image
Executive Editor

Laura is an award-winning editor with experience in content and communications covering auto insurance and personal finance. She has written for several media outlets, including the USA Today Network. She most recently worked in the public sector for the Nevada Department of Transportation.