Do I need RMV approval just for alloy wheels or window tint?

Cosmetic fittings like alloy wheels, stickers or tint are lower risk, but Section 19 of the Motor Traffic Act covers any change to a vehicle's construction, and ongoing Clean Sri Lanka inspections have flagged non-standard lights, loud exhausts and plate-covering stickers. When in doubt, ask your nearest RMV office before you sell.

Can I sell a car with an engine swap that was never approved?

You can try, but the buyer's ownership transfer will likely stall at RMV because the engine number on the CR book won't match the vehicle. It's safer to get Commissioner General approval and update the CR book first, or disclose it clearly and drop the price to reflect the risk.

How long does CMT 72 approval usually take?

There's no fixed public turnaround time, since it depends on the Technical Branch's workload and whether an inspection is needed. Ask your RMV office for a current estimate when you submit the CMT 72 and CMT 130 forms.

Does a modified car sell for less in Sri Lanka?

Generally yes. Buyers often prefer vehicles in original condition because they're easier to insure, finance and transfer, so heavily modified cars can take longer to sell or fetch a lower price.

Can I convert my car to LPG before I sell it?

Only if the vehicle is more than 3 years and less than 25 years old from its first registration date, and only after you get prior approval from the Commissioner General of Motor Traffic through the Technical Branch, followed by a weight certificate from the Werahera office.

Guide7 min read9 views

Selling a Modified Car in Sri Lanka: RMV Approval You Need

Updated 7 November 2026 · Written by the Wahanaya.lk team

ShareWhatsApp Facebook

Yes, you can sell a modified car in Sri Lanka, but any change to its original construction — engine swap, fuel conversion, body kit, suspension, even colour — needs prior written approval from the Commissioner General of Motor Traffic and must be recorded in the CR book before the buyer can…

Can You Legally Sell a Car With Modifications in Sri Lanka?

Yes, but only if the modifications are either approved by the Department of Motor Traffic (DMT) and recorded in the Certificate of Registration (CR book), or you reverse them before you hand the car over. Under Section 19 of the Motor Traffic Act, no one may "adapt, modify or change the construction" of a vehicle without the prior written approval of the Commissioner General of Motor Traffic. If you sell a car with unapproved changes, the problem usually doesn't stop you from selling it — it stops your buyer from transferring it into their name at the RMV.

Key facts

Modifying a vehicle's construction without approval is an offence under Section 19 of the Motor Traffic Act, as confirmed by the Motor Traffic Act consolidated text.
Revising details on the CR book (colour, engine number, class) uses the CMT 72 application, with a CMT 130 examiner's certificate for colour or engine-number changes, per the DMT's Change of Attributes page.
As of November 2026, the DMT's listed fee for a CMT 72 application is Rs. 300 — confirm the current fee at your RMV office before you go, since fees do change.
There's no separate registry for modified vehicles — an approved change is simply noted in the same CR book you already have.
Fuel conversion (LPG/CNG) is only allowed after 3 years and before 25 years from first registration, and needs Technical Branch approval plus a weight certificate from the Werahera office.
Vehicle class conversion is only allowed within 25 years of first registration, using the same CMT 72/CMT 130 process.
Ongoing Clean Sri Lanka inspection drives have targeted unapproved aftermarket lights, loud exhausts, stickers covering the plate and other cosmetic changes, per Sunday Times reporting.
An engine swap needs the Commissioner General's approval plus the purchase receipt for the new engine before the CR book can be updated.

What Counts as a "Modification" That Needs RMV Approval?

Anything that changes the vehicle's original construction can count — not just an engine swap. In practice, the changes that most often trip up a sale are: engine replacement, fuel system conversion (petrol/diesel to LPG or CNG), suspension changes that alter ride height, chassis or body alterations, and colour changes that don't match the CR book. Purely cosmetic add-ons like stickers, decals or decorative lights are lower risk on their own, but recent Clean Sri Lanka enforcement has still flagged some of these as unauthorised, so don't assume anything bolted on or sprayed on is automatically fine.

How Do You Get a Modification Approved Before You Sell?

Start at your local RMV office or the DMT's Technical Branch, well before you list the car. For a colour or engine-number change, you'll need a CMT 130 Motor Vehicle Examiner's certificate alongside the CMT 72 application form, your current Certificate of Registration, Vehicle Identity Card, and — for an engine change — the Commissioner General's written approval and the purchase receipt for the replacement engine. Submit these, pay the application fee, and once approved, the change is entered into your CR book. Only then is the car straightforward for a buyer to transfer.

What If You Already Modified the Car Without Getting Approval?

You have two realistic options: apply for retroactive approval now, or reverse the modification back to standard spec before you sell. Retroactive approval isn't guaranteed — the Technical Branch may require the vehicle to meet current safety and inspection standards before it signs off. If the modification is something a buyer is unlikely to want anyway (a non-standard exhaust, a lowered suspension, tinted windows beyond the legal limit), it's often simpler and cheaper to put it back to original condition than to chase paperwork. Whichever route you choose, do it before you advertise the car, not after you've found a buyer — RMV approval can take time, and a deal can fall through while a buyer waits on it.

Does an Engine Swap Need Separate Approval From Everything Else?

Yes. An engine swap is treated as its own category because the engine number is printed on the CR book and checked during ownership transfer. If you've swapped in a different engine — even a same-model unit from a donor vehicle — you need the Commissioner General's prior approval and must submit the engine's purchase receipt (with photocopies) to get the CR book updated. Selling the car with the old engine number still on the CR book, while a different engine is actually fitted, is the single most common reason a private sale stalls at the RMV.

Can You Sell a Car With an LPG or CNG Fuel Conversion?

Only if the conversion itself was done legally and is recorded on the CR book. Fuel conversion is permitted only between 3 and 25 years from the vehicle's first registration date. The process runs through the DMT's Technical Branch: you submit CMT 130 and CMT 72 forms, a photocopy of the revenue licence, the engine bill, a letter from the finance company if the vehicle is still under lease, and a written request. Once the Commissioner General approves it, you present the vehicle at the Werahera office for a weight certificate before the CR book is finalised. If your car has an LPG tank fitted without this paper trail, flag it honestly to buyers — an unrecorded gas conversion is both a safety concern and a transfer problem.

Will the Buyer's RMV Transfer Be Rejected Because of My Modifications?

It can be delayed or sent back for correction rather than outright rejected on the spot, but the practical effect is the same — your sale stalls. RMV staff checking an ownership transfer will compare the physical vehicle against what's on the CR book: engine number, colour, class and fuel type. A mismatch means the buyer is told to sort out the modification approval before the transfer can proceed, which is awkward once money has already changed hands. Settle this before you post the ad, not after.

Should You Reverse Modifications Before Selling, or Disclose and Discount?

If the modification is unapproved, reversible, and not something most buyers want (a loud exhaust, a body kit, a non-standard suspension), reversing it to factory spec before you sell is usually the cleanest path — it removes the transfer risk entirely and widens your pool of buyers. If reversing isn't practical (an engine swap, for example), your remaining option is full disclosure: tell the buyer exactly what was changed, show whatever documentation you have, and expect to negotiate on price, since the buyer is taking on the cost and hassle of regularising it. Never let a buyer discover an unapproved modification only after they've paid you and gone to the RMV.

Checklist Before You List a Modified Car for Sale

Compare the car's current engine number, colour and fuel type against what's printed on the CR book.
If anything doesn't match, decide: get it approved and recorded, or reverse it to original spec.
For an engine swap, gather the purchase receipt and apply for Commissioner General approval before advertising.
For a fuel conversion, confirm it falls within the 3–25 year window and has a Werahera weight certificate.
Check for any Clean Sri Lanka-flagged items (non-standard lights, exhausts, decorations) and remove them if unapproved.
Be upfront in your ad description about any modification, approved or not — it avoids disputes after a deposit is paid.
Price the car realistically on /price-check — modified vehicles often sell slower or for less than stock equivalents.
Once it's ready, list it on /vehicles or create your ad through /post-ad.

If you're not sure whether a specific modification needs RMV sign-off, or how to handle a tricky case like an old engine swap with no paperwork, ask in the Wahanaya forum — other sellers who've been through the same RMV process can point you in the right direction. And whoever you're selling to, follow basic precautions from our safety tips when you meet buyers and hand over the vehicle.

Sources

Questions

Do I need RMV approval just for alloy wheels or window tint?: Cosmetic fittings like alloy wheels, stickers or tint are lower risk, but Section 19 of the Motor Traffic Act covers any change to a vehicle's construction, and ongoing Clean Sri Lanka inspections have flagged non-standard lights, loud exhausts and plate-covering stickers. When in doubt, ask your nearest RMV office before you sell.
Can I sell a car with an engine swap that was never approved?: You can try, but the buyer's ownership transfer will likely stall at RMV because the engine number on the CR book won't match the vehicle. It's safer to get Commissioner General approval and update the CR book first, or disclose it clearly and drop the price to reflect the risk.
How long does CMT 72 approval usually take?: There's no fixed public turnaround time, since it depends on the Technical Branch's workload and whether an inspection is needed. Ask your RMV office for a current estimate when you submit the CMT 72 and CMT 130 forms.
Does a modified car sell for less in Sri Lanka?: Generally yes. Buyers often prefer vehicles in original condition because they're easier to insure, finance and transfer, so heavily modified cars can take longer to sell or fetch a lower price.
Can I convert my car to LPG before I sell it?: Only if the vehicle is more than 3 years and less than 25 years old from its first registration date, and only after you get prior approval from the Commissioner General of Motor Traffic through the Technical Branch, followed by a weight certificate from the Werahera office.

What to Do When Your Car Buyer Is Taking a Lease in Sri Lanka

When a buyer pays through a lease or bank loan, their finance company sends an approved valuer to inspect your car and registers itself as absolute owner on the CR book before you get paid, so expect extra paperwork and a short delay versus a cash sale.

15 Nov 2026Wahanaya.lk team8 min read

Safest Way to Accept Payment When Selling a Car in Sri Lanka

The safest payment is a bank transfer or bank draft you verify yourself by checking your own banking app or calling your bank — never a screenshot the buyer sends you. Don't hand over the CR book, keys or signed MTA 6 form until the money has actually settled in your account.

11 Nov 2026Wahanaya.lk team7 min read

Do You Need a Valid VET Certificate to Sell a Car in Sri Lanka?

Yes — the DMT's ownership-transfer system checks that your vehicle's VET (emission test) certificate and revenue licence are both in date before it lets the transfer go through, so renew an expired VET before you sell, unless your vehicle is exempt.