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over 8 years ago

What is the procedure to convert Bi-fuel Vehicle(CNG) to a petrol-only vehicle?

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1 Answer

Eugene Foo

1. You will need to submit an application form called R18 (APPLICATION FOR REMOVAL OF

CNG SYSTEM FROM VEHICLE) to LTA which can be found in the following link:

Note: There is an admin fee of $21.40

2. You will have to also check on Green Vehicle Rebate top-up amount payable to convert your Petrol-CNG vehicle to Petrol vehicle. To check on the amount payable, kindly proceed to this link:

3. Upon successful amendment of the vehicle specifications, vehicle owner must remove the CNG system and pass a vehicle inspection within 10 calendar days. Removal of CNG system can be removed at LTA appointed CNG workshop. You may get the details from LTA.

Vehicle owner / CNG System supplier/installer will need to submit the following information through LTA’s Vehicle Inspection and Type Approval System (VITAS) under the “Change of Vehicle Particulars Inspection (with VE Approval)” electronically with a processing fee of $64.20 (inclusive of GST):

i. a completed Change of Vehicle Particular (CVP) application form by the registered vehicle owner to remove the CNG system.

The form can be downloaded from our VITAS website at;

ii. certification from the CNG system supplier that the CNG system has been removed according to the product manufacturer’s recommendation with sound engineering practice and does not adversely affect the safe operation and/or exhaust emissions characteristics of the vehicle and affected parts on the vehicle (e.g. intake manifold, drilled boot space, etc) are restored to its original condition;

iii. certification from the CNG system supplier that the used CNG system has been properly disposed of;

iv. invoice for the works; and

v. the notification letter issued by LTA on the successful amendment of the vehicle specifications.

Upon receiving the VITAS approval, send the the vehicle for inspection at any of the LTA-authorised vehicle inspection centres (AIC).

AIC will issue an acknowledgement letter when the vehicle passes the inspection. Please note that an inspection fee will be payable to the AIC.


over 8 years ago