Knowledge base Road rules Updated 15 Oct 2026 21 min read

Vehicle roadworthiness and periodic inspection in Singapore

Vehicle inspection intervals, LTA inspection checks, roadworthiness guidance, and key controls on vehicle modifications in Singapore.

vehicle-inspection roadworthiness vehicle-modifications headlights vehicle-maintenance LTA road-tax

Primary source: https://onemotoring.lta.gov.sg/content/onemotoring/home/owning/ongoing-car-costs/inspection.html

LTA requires periodic inspections to check that vehicles remain roadworthy and meet emission standards. The required interval depends on vehicle type and age (OneMotoring, Vehicle Inspection).

Inspection frequency

The table gives the intervals on LTA's current inspection page. “Nil” means no periodic inspection is listed for that age band; it does not remove any other inspection requirement that may apply to a vehicle (OneMotoring, Vehicle Inspection).

Vehicle type	Under 3 years	3 to 10 years	Over 10 years
Motorcycle or scooter	Nil	Annually	Annually
Car	Nil	Every 2 years	Annually
Tuition car	Annually	Annually	Annually
Taxi	Annually	Every 6 months	Not applicable
Chauffeured private hire car	Annually	Annually	Every 6 months
Omnibus	Every 6 months	Every 6 months	Every 6 months
Other bus	Annually	Annually	Every 6 months
Goods vehicle	Annually	Annually	Every 6 months
Trailer	Annually	Annually	Annually

Taxis and buses fitted with compressed natural gas (CNG) or bi-fuel CNG systems must also have those systems checked every 3 months. From 1 January 2025, taxis under 3 years old moved to annual inspections, while chauffeured private hire cars over 10 years old moved to inspections every 6 months (OneMotoring, Vehicle Inspection).

Booking and inspection

LTA sends an inspection notice within 3 months before the due date. Owners may bring a due vehicle for inspection without waiting for the notice, and do not need to present the notice at the inspection centre. An inspection completed more than 3 months before its due date is not valid for road-tax renewal. If exceptional circumstances require an earlier inspection, contact LTA (OneMotoring, Vehicle Inspection).

Owners may take the vehicle to any LTA-authorised inspection centre. The periodic inspection checks structural integrity; wheels, tyres, suspension and alignment; service and parking brakes; drive shafts and steering; body components including seat belts, windscreen, door latches and hinges; lights, reflectors, mirrors, indicators, wipers and horn; and exhaust emissions and noise against prevailing standards (OneMotoring, Vehicle Inspection).

The statutory test procedure distinguishes a pass from a failure: if the vehicle complies with the prescribed requirements, the authorised examiner issues an electronic test certificate (and a printed copy if requested); if it does not, the examiner issues an inspection report with the detailed examination results (Singapore Statutes Online, Road Traffic (Motor Vehicles, Test) Rules, r. 10). The examination must follow the procedures and performance standards in the Rules’ schedules. From 1 May 2026, the inspection test checks that each tyre’s tread is at least 1.6 mm deep throughout at least three-quarters of the tread width and around the entire outer circumference; this raised the former 1 mm inspection threshold (Singapore Statutes Online, Road Traffic (Motor Vehicles, Test) Rules, Third Schedule, Part V, para. 14(f); Road Traffic (Motor Vehicles, Test) (Amendment) Rules 2026).

Section 91 of the Road Traffic Act prohibits using a vehicle for which there is no test certificate. LTA also requires a vehicle due for inspection to pass before road-tax renewal. LTA says authorised inspection centres set their inspection fees and itemise them according to the tests required for each vehicle type (LTA, Inspection fees itemised based on required tests). For a chauffeured private hire car that fails periodic inspection, LTA requires the owner to rectify the failed items and pass re-inspection before road-tax renewal; the centre charges a separate re-inspection fee, with amounts available from the centres. Sections 88–89 of the Act authorise inspection and further-inspection fees and rules prescribing them. The official sources reviewed do not set out a general repair-and-re-inspection sequence for other vehicle types. They also do not say whether a failed periodic inspection by itself cancels a still-valid certificate; do not infer permission or a ban from the failure alone (Road Traffic Act 1961, ss. 88–91; OneMotoring, Road Tax; OneMotoring, Vehicle Inspection; LTA, FAQs for Private Hire Car Matters).

A person aggrieved by a refusal of a test certificate or its stated grounds may appeal to the Registrar using the approved form. The former 24-hour deadline to lodge an appeal was removed from 23 December 2025; the current rule states no replacement deadline (Singapore Statutes Online, Road Traffic (Motor Vehicles, Test) Rules, r. 12; Road Traffic (Motor Vehicles, Test) (Amendment No. 2) Rules 2025). The Registrar arranges a further examination; the appeal fee is $50; and the Registrar’s decision on that examination is final (Singapore Statutes Online, Road Traffic (Motor Vehicles, Test) Rules, r. 13; r. 14). On appeal, a passing examination results in an electronic test certificate (a printed copy is available on request), while a failed examination results in a detailed inspection report (Road Traffic (Motor Vehicles, Test) Rules, r. 13(5); Road Traffic (Motor Vehicles, Test) (Amendment No. 2) Rules 2025).

Roadworthiness and lights while driving

The Highway Code advises maintaining a roadworthy vehicle. It calls for suitable tyres kept at correct pressure, replacement of worn tyres, regular brake checks and prompt attention to brake-fluid leaks, regular checks and adjustment of a car’s steering assembly, and checks that all lights, including parking and signalling lights, work (Singapore Statutes Online, Highway Code, para. 105).

The Code says to drive with headlights on from 7 pm to 7 am. Use dipped headlights at night in built-up areas with poor street lighting or in rainy weather; use headlights on unlit or dimly lit roads, dip them when meeting vehicles or cyclists, and slow down and stop if dazzled. Dip headlights when driving behind another vehicle. In daytime, switch on lights whenever visibility is poor or it is raining. The Code also advises leaving side or parking lights on when parked at night on an unlit or poorly lit road (Singapore Statutes Online, current Highway Code, paras. 95–100).

The separate Road Traffic (Motor Vehicles, Lighting) Rules require every vehicle on a road during the hours of darkness (7 p.m. to 7 a.m.) to carry two visible white front lamps and two visible red rear lamps. When a motor vehicle is moving during those hours, its required lamps must be lit. Headlamps must emit a dipped beam when lit on a road with street lamps no more than 150 metres apart and those street lamps are lit. On a road, headlamps must be switched off while the vehicle is stationary, except during an enforced stoppage or when a public-service vehicle stops to pick up or set down passengers. Lamps on motor vehicles must be kept unobscured, clean and efficient. Motorcycles first registered in Singapore on or after 1 November 1997 must have a device that automatically switches the headlamp to dipped beam when the engine is started and keeps it lit while the engine runs (Singapore Statutes Online, Road Traffic (Motor Vehicles, Lighting) Rules, rr. 4–7 and 6A). This gives the legal requirements alongside the Highway Code driver-facing lighting advice above.

Fog lamps have a separate legal use restriction: a motor-vehicle fog lamp must not be lit except in conditions of seriously reduced visibility, or in a way that causes undue dazzle or discomfort to other road users. The rule does not set a numerical visibility threshold. LTA’s installation guidance separately says front fog lamps can switch on only when the front and rear position lamps are on, and rear fog lamps only when the headlamps are on; each must have a separate switch and must not turn on automatically with the position lamps or headlamps (Singapore Statutes Online, Road Traffic (Motor Vehicles, Lighting) Rules, r. 23; OneMotoring, Vehicle Technologies and Modifications).

For large vehicles, the Code says to comply with the lower of the road speed limit and vehicle speed limit, and to travel in the extreme left lane except in bus lanes during operating hours so faster vehicles can overtake on the right. It also refers goods-vehicle open-deck passenger carriage to the applicable construction-and-use and carriage-of-persons rules (Singapore Statutes Online, Highway Code, paras. 101–102).

Routine checks and maintenance

The SPF Final Theory handbook separates checks into daily, weekly, and periodic maintenance. These are driver-maintenance recommendations; they do not replace LTA's statutory periodic vehicle inspection (SPF, Final Theory of Driving handbook, paras. 294–296; OneMotoring, Vehicle Inspection).

Before driving: check that registration plates are clean and legible; look for punctures; confirm the lights and reflectors work; clean the front and rear windscreens; check beneath the vehicle for oil or water leaks; and check that dashboard warning lights and gauges work. After starting, move off slowly and check for unusual noises or vibrations, brake operation and pulling to either side, and unusually heavy steering (SPF, Final Theory of Driving handbook, para. 294).
The handbook's separate pre-driving routine also says to walk around the vehicle to look for body damage, check that tyres are properly inflated, and before moving adjust the seat and mirrors, fasten the seat belt, and make sure the handbrake is fully on (SPF, Final Theory of Driving handbook, paras. 70–71 and 75).
Weekly: check coolant, windscreen-washer fluid, engine oil, battery-terminal connections and battery-water level, brake fluid, and tyre pressure including the spare. The handbook also lists carrying a spare tyre, jack and handle, and wheel-nut wrench (SPF, Final Theory of Driving handbook, para. 295).
At manufacturer-recommended intervals: have an authorised service station check, service, or replace engine oil, oil filter, gearbox oil, air cleaner, chassis, ignition system, suspension, and brake linings (SPF, Final Theory of Driving handbook, para. 296).

Some checks correspond to continuing legal vehicle-condition duties. The Construction and Use Rules require a vehicle and its parts to be maintained so they do not cause or risk danger; require brakes, steering gear, and windscreen wipers to remain in good and efficient working order; require prescribed lamps and reflectors to be maintained; and prohibit use with unsuitable, unsafe, or insufficiently inflated tyres (Singapore Statutes Online, Road Traffic (Motor Vehicles, Construction and Use) Rules, rr. 101, 104, 105 and 109). The handbook's checklist is general guidance; those legal duties apply while the vehicle is used on the road.

For motorcycles, Traffic Police's 2026 Ride Safe campaign advises checking tyres, brakes and lights before every ride (SPF, Launch of Singapore Ride Safe 2026).

The Code further advises keeping vehicles properly maintained to minimise smoke and eliminate excessive noise (Singapore Statutes Online, Highway Code, paras. 103–104).

Smoke and idling while in use

It is an offence to use, or cause or permit the use on a road of, a motor vehicle that emits smoke or visible vapour. The driver is liable, and an owner who is not the driver is also liable (NEA, Air Pollution Regulations). NEA states that, if convicted in court, the maximum fine is $2,000 for a first offence and $5,000 for a subsequent offence. NEA may require a smoke-emission inspection; if the vehicle fails, the owner must rectify it and pass re-inspection before it is allowed back on the road (NEA, Air Pollution Regulations).

A driver must not leave a motor vehicle engine idling while the vehicle is stationary for a reason other than traffic conditions. NEA lists exceptions where the engine is needed to operate onboard equipment, the vehicle is moving in a queue, the vehicle is being inspected or repaired, or it is an enforcement or emergency vehicle. NEA states that the maximum court fine is $2,000 for a first offence and $5,000 for a subsequent offence (NEA, Air Pollution Regulations).

The public can report a smoky vehicle or idling engine to NEA through its online feedback form or MyENV app, providing the registration number, location, date and time (NEA, Air Pollution Regulations).

A car being converted to a chauffeured private hire car needs a conversion inspection if it has no valid periodic-inspection pass result from the preceding 3 months (OneMotoring, Vehicle Inspection).

For a chauffeured private hire car that fails its periodic inspection, LTA says the owner must rectify the failed items and pass a re-inspection before renewing the vehicle's road tax. A separate re-inspection fee is charged; LTA directs owners to authorised inspection centres for fee details (LTA, FAQs for Private Hire Car Matters, Q7). If a car fails the inward conversion inspection, LTA likewise requires the failed items to be rectified and the car to pass re-inspection before PHC conversion; the centre may charge a separate re-inspection fee (LTA, FAQs for Private Hire Car Matters, Q19).

Vehicle modifications

LTA defines a vehicle modification as replacing, adding, or removing a component or system so that the vehicle differs from the manufacturer’s original specifications. Before making a change, check LTA’s current category and item-specific guidance. LTA divides modifications into those that do not need approval, those that need approval, and those that are not allowed; all modifications must be installed by qualified personnel following the vehicle and product manufacturers’ recommendations (OneMotoring, Vehicle Technologies and Modifications).

Modifications LTA lists as not requiring approval

LTA’s no-approval section covers bumpers, car seats, fog lamps, fuel additives, fuel-molecule polarisers, gear knobs, in-vehicle entertainment and information/communication systems, intake air filters and manifolds, meters and gauges, radiators, convertible rollover bars, roof racks, side skirts, light-goods-vehicle side windows and partitions, spark plugs and cables, spoilers, car sports rims, steering wheels, sunshades and curtains, suspension systems, tinted films and glass, and tyres. It also covers motorcycle foot pegs and foot-rest systems, chains and sprockets, fairings, horns, brake hoses, rims, handlebar risers, engine guards/crash bars, tyres, and replacement rear-view mirrors. “No approval” does not waive the item-specific conditions LTA lists for safe installation and use (OneMotoring, Vehicle Technologies and Modifications).

Examples of those conditions include keeping approved, edge-safe bumper designs; securing seats at the original anchorage points without obstructing the driver’s view; ensuring in-vehicle screens cannot distract the driver while the vehicle is moving; keeping roof cargo within the vehicle or rack capacity and securely fastened; and using non-reflective window films that transmit at least 70% of light through the front windscreen and front side windows and 25% through the rear windscreen and rear side windows. LTA also specifies motorcycle-specific fitment and safety conditions for parts such as tyres, horns, brake hoses, risers and engine guards (OneMotoring, Vehicle Technologies and Modifications).

For motorcycle rear-view mirrors, LTA says each motorcycle must have one mirror on each side. Motorcycles registered from 1 May 2026 must have mirrors meeting an internationally recognised standard such as UN Regulation 81; for earlier registrations, that standard applies when mirrors are replaced. LTA also specifies convex, firmly mounted and adjustable mirrors, with size requirements for round and non-circular mirrors (OneMotoring, Vehicle Technologies and Modifications).

Modifications that need LTA approval

LTA lists replacement engines, exhaust systems, superchargers or turbochargers, and transmissions as requiring approval. For motorcycles, approval is required for a replacement engine/crankcase and an aftermarket lighting assembly. Like-for-like replacement of a hybrid/electric vehicle’s traction battery or traction motor also requires a Change of Vehicle Particulars application and supporting manufacturer/workshop documents; the battery guidance excludes EVs using approved swappable batteries at designated swapping stations (OneMotoring, Vehicle Technologies and Modifications).

For example, LTA requires supporting suitability certifications and recognised test reports for an aftermarket exhaust. Removing a catalytic converter or muffler is prohibited; the motorcycle exhaust silencer or dB killer must not be removed either. An approved motorcycle engine/crankcase replacement must be the same make and model and have the same engine capacity, and the motorcycle must be inspected after replacement (OneMotoring, Vehicle Technologies and Modifications).

Modifications LTA does not allow

LTA’s prohibited examples include air horns; chassis modifications; crash bars; aftermarket daytime-running lamps; decorative lamps; increasing engine capacity; aftermarket HID headlamp kits and higher-wattage replacement bulbs; removing motorcycle chain guards or original mudguards; removing motorcycle rear-view mirrors; disabling the automatic headlamp switch-on function on motorcycles that must have it; modifying a motorcycle’s original rear swing arm; nitrous injection devices; uncovered spot lamps; tinting or masking vehicle lamps; and tow hooks. LTA’s page explains the item-specific safety, visibility, emissions, or nuisance reason for each prohibition (OneMotoring, Vehicle Technologies and Modifications).

LTA advises checking that modifications on a used vehicle are allowed and says an LTA-authorised inspection centre can assess the vehicle. It also relays GIA’s advice to notify the motor insurer because modifications may affect coverage and claims may be declined if the insurer was not informed (OneMotoring, Vehicle Technologies and Modifications). LTA says individuals who illegally modify vehicles may be fined up to $20,000, imprisoned for up to 2 years, or both; penalties are doubled for repeat offenders (OneMotoring, Vehicle Technologies and Modifications).

Enhanced Inspection Regime

If a vehicle is found with an illegally modified engine or exhaust system for a second time, LTA places it under the Enhanced Inspection Regime (EIR) and requires inspections every 6 months for 2 years. For a third or subsequent offence, inspections are required every 3 months for 2 years (OneMotoring, Vehicle Inspection).

Using a vehicle without a test certificate

The Road Traffic Act makes it an offence to use, or cause or permit the use of, a motor vehicle on a road when it has no test certificate; the stated maximum court fine is $200. LTA says a vehicle due for inspection must pass before its road tax can be renewed (Road Traffic Act 1961, s. 91; OneMotoring, Road Tax).

Coverage debt

The article now names LTA’s published modification categories and item types, but does not reproduce every installation specification or measurement for each item. Use LTA’s current item-specific page before making a modification.
The general failed-inspection process remains unclear for vehicle types other than chauffeured private hire cars. Authorised centres set inspection fees, but the official sources reviewed do not state a general repair/re-inspection sequence or whether a failed test by itself cancels an unexpired test certificate. Do not infer permission or a ban solely from the failure result; see the research queue.

LTA’s live Vehicle Inspection page was rechecked on 15 October 2026. It still describes inspection frequency, checks and where to inspect but does not state the general remedy after failure. The live Road Tax page still requires an inspection pass when inspection is due for road-tax renewal; it does not explain the effect of failure while a prior certificate remains valid (OneMotoring, Vehicle Inspection; OneMotoring, Road Tax).

LTA directs motorists to authorised inspection centres for appointments and centre-specific operating information; this article does not maintain a centre directory.
The Highway Code's term “large vehicles” in paragraph 101 is not further defined in that paragraph. This summary does not infer which vehicle categories it covers; the separate commercial-vehicle operating restrictions article covers selected LTA-defined vehicle classes.