JPJ Car Modification Rules: 5 Illegal Mods That Can Affect Your Insurance in Malaysia 2026
Summary: Some car modifications are allowed in Malaysia, but they must comply with JPJ’s car modification rules and, for certain changes, may require JPJ approval. Non-compliance could lead to fines, failed inspections, or insurance complications.
Car modifications can improve your car’s appearance and performance, but not every upgrade complies with JPJ car modification rules. Understanding the latest car modification rules Malaysia helps you avoid fines, failed PUSPAKOM inspections, and potential insurance claim issues.
Explore the full version of JPJ car modification rules and PUSPAKOM inspection standards here.
1. Larger Rims and Tyres That Change the Car’s Height
Upgrading your wheels is a great way to customise your ride, but it’s easy to breach JPJ car modification rules if the new size alters your car’s original height specifications.
A JPJ-compliant tyre setup must stay fully covered by the mudguards or mudflaps and must not increase the vehicle’s overall height.
These modifications can become a problem if:
the tyres protrude beyond the mudguard or body line
the modification increases the vehicle’s overall height
the wheel setup affects safe fitment, tyre clearance, or roadworthiness
2. Oversized GT Wings, Spoilers, and Aero Add-Ons
Before installing an aggressive rear wing, it's important to understand the spoiler size limit Malaysia drivers must follow under JPJ car modification rules. Rear spoilers and aero parts must not obstruct visibility or extend beyond JPJ's permitted dimensions.
As a general rule, spoilers and aero parts must not extend more than 150 mm beyond the outer edge of the rear tyres.
These modifications can become a problem if:
the spoiler or aero component extends beyond JPJ’s permitted limit
the installation creates unsafe protrusions or safety hazards
If you’re buying a universal aftermarket wing or body kit, don’t assume it’s road legal just because it fits your boot or bumper. Always check how far it projects beyond the car’s rear tyre line after installation.
3. Aggressive Bumpers and Protecting Guards
Many pickup and SUV owners ask whether a kangaroo bar is legal in Malaysia. The answer depends on its size and installation. Under JPJ car modification rules, protecting guards must comply with strict dimensional requirements and must not create safety hazards.
These modifications can become a problem if:
the added bumper or guard exceeds 50% of the vehicle’s wheelbase
it blocks the headlights, indicators, or other vehicle lights
it has sharp edges
any part protrudes more than 100 mm
the protecting guard exceeds 150 mm of the vehicle’s overall width
These accessories are not just cosmetic. Oversized or poorly fitted bars can create a greater safety risk in a collision.
4. Oversized Door Visors
If you’re wondering about the door visor JPJ rules, standard door visors are generally allowed provided they do not exceed JPJ’s maximum permitted dimensions of 100 mm in both width and height.
This modification can become a problem if:
the visor exceeds 100mm width and height
the design affects visibility or creates unsafe protrusions
If you’re buying aftermarket “VIP” or extra wide visors, ask for the actual dimensions before installation instead of relying on listing photos.
5. Lowered or Lifted Suspension
Lowered sedans and lifted 4x4s are popular, but suspension changes can create compliance and roadworthiness issues if they affect the vehicle’s safety, stability, steering, braking, tyre clearance, or overall construction. Depending on the nature of the modification, JPJ approval may be required.
It can become a problem if:
it significantly alters the vehicle’s ride height or construction
it causes tyre rubbing, poor alignment, or instability
it affects braking, steering, or suspension performance
Before lowering or lifting your car, check whether the modification requires JPJ approval and make sure the setup is installed safely and properly.
How Modified Cars Can Fail a PUSPAKOM Inspection
If your car has been modified, it must pass a PUSPAKOM inspection to ensure that all upgrades comply with JPJ car modification rules.
Even small modifications can create roadworthiness issues during inspection. Common problem areas include:
Suspension: If the setup causes worn shocks, sagging springs, or damaged bushings
Wheel alignment: If wheel or suspension changes lead to side slip
Headlights: If aftermarket HID or LED conversions are misaligned or non-compliant
Body and underbody checks: If there are unsafe body add-ons, loose exhaust parts, or structural issues
Window tint: If it does not comply with the Visible Light Transmission (VLT) requirements or fails the tinted glass inspection.
Planning to tint your car window? Check out these window tint guidelines first!
Disclaimer: These guidelines and inspection standards may change from time to time. It is encouraged to make verifications first before proceeding with car modifications.
Why Modifications Can Affect Your Car Insurance
If you’ve upgraded your car with rims, body kits, spoilers, or suspension changes, it’s worth informing your insurer.
Driving a vehicle with illegal car modifications Malaysia authorities prohibit can increase the risk of insurance claim disputes. Even if the modification seems minor, insurers may investigate whether it affected the accident or changed the vehicle’s risk profile.
Do you know the difference between car insurance for standard cars and modified cars? Read our guide to know more.
The Impact on Your No Claim Discount (NCD)
Modifying your vehicle doesn't just affect immediate repair claims. It can also reset your hard-earned NCD. In Malaysia, your NCD rewards safe driving with substantial premium discounts. However, installing illegal or undeclared parts creates a risky chain reaction:
Claim Rejection & Policy Cancellation: If an insurer discovers undisclosed, non-compliant modifications after an accident, they may reject your claim or void your policy due to failure to disclose the modifications.
The NCD Reset: If an accident occurs and a successful claim is made against your policy, your NCD will instantly drop to 0% upon your next renewal.
Double Financial Loss: You will be forced to pay for all vehicle repairs out of pocket while simultaneously losing your premium discount.
To safeguard your coverage and your NCD, always ensure your modifications are JPJ-compliant and fully declared to your insurer.
Here’s everything you need to know about NCD and how it works.
Protect Your Car and Save More With PolicyStreet
Modifying your car is a fun way to express your style and enhance your ride, but staying informed about JPJ car modification rules ensures your car remains street-legal and fully covered by your insurance.
PolicyStreet makes it easy to compare car insurance in Malaysia, renew your policy online, and manage your road tax in one place. Whether you’re looking for comprehensive car insurance or a simple renewal experience, PolicyStreet helps you find suitable coverage quickly and conveniently.
Renewing soon? PolicyStreet offers promotional campaigns and discounts to help Malaysian drivers reduce car ownership costs while providing a super helpful, super reliable car insurance renewal experience. It’s a simple way to save time, reduce hassle, and keep your vehicle protected and compliant for the road ahead.
See our promotions page for the latest offer details.
Drive Smart, Modify Responsibly
Whether you're installing aftermarket rims, suspension upgrades, spoilers, or body kits, understanding the latest JPJ car modification rules and PUSPAKOM inspection standards in Malaysia is essential. Avoiding illegal car modifications Malaysia not only keeps your vehicle road legal but also protects your insurance coverage and helps prevent costly claim disputes.
And when it’s time to renew, make sure your protection keeps up with your car too. Compare car insurance with PolicyStreet, renew online in minutes, and enjoy free road tax with your renewal.
Frequently Asked Questions
1. Are aftermarket rims legal in Malaysia?
Yes, larger rims and tyres are generally allowed for private vehicles as long as they remain fully covered by the mudguards or mudflaps and do not increase the vehicle’s overall height.
2. What is the spoiler size limit in Malaysia?
Under JPJ car modification rules, rear spoilers and aero add-ons must not extend more than 150 mm beyond the outer edge of the rear tyres. Exceeding the spoiler size limit Malaysia allows can result in compliance issues.
3. Is lowering or lifting my car illegal in Malaysia?
Depends. Lowering or lifting a car is not automatically illegal, but it can create compliance issues if it affects the vehicle’s safety, dimensions, or roadworthiness. Depending on the modification, JPJ approval may be required.
4. What are the door visor JPJ rules?
Yes, but only if they stay within JPJ’s size limits. Door visors must not exceed 100 mm in width and height.
5. Is a kangaroo bar legal in Malaysia?
A kangaroo bar is legal in Malaysia only if it complies with JPJ's dimensional and safety requirements. Oversized protecting guards that protrude excessively, block vehicle lights, or have sharp edges can breach JPJ car modification rules.
6. Can illegal or undeclared modifications affect my car insurance claim?
Yes. If a modification is non-compliant or was not disclosed, your insurer may investigate whether it contributed to the accident or changed the vehicle’s risk profile.
7. Can modified cars fail a PUSPAKOM inspection?
Yes, especially if the modifications affect suspension, wheel alignment, lighting, emissions, tinted glass, or the vehicle’s overall roadworthiness and safety.
8. Can I renew my car insurance and road tax with PolicyStreet?
Yes. PolicyStreet lets you compare car insurance, renew your policy online, and manage your road tax renewal in one place, with free road tax promotions available during selected campaigns. Get your quote now.
