Whether a commercial vehicle needs a speed limitation device depends on its vehicle class, registration details and the rules currently applied by the relevant authority. MIJO fuel-control speed limitation devices are for compatible trucks and buses, while MIJO electronically controlled speed limitation devices are for compatible cars. Operators should confirm the latest position before specifying, fitting or configuring a device.
This guide explains product and selection principles. It does not confirm compatibility, replace model-specific documents or provide a repair procedure.
What a speed limitation device does
In vehicle terminology, the phrase ‘SLD full form in vehicle’ refers to a speed limitation device.
A speed limitation device is designed to prevent a vehicle from exceeding a configured road-speed threshold. It works with the vehicle's controls while leaving the driver responsible for braking, steering and safe operation.
The suitable device and installation method depend on the vehicle's fuel system, electronics and intended use. A technical assessment is therefore important before fitment.
MIJO fuel-control speed-limitation devices are intended for technically compatible trucks and buses, while MIJO electronic devices are intended for technically compatible cars. This product-use distinction does not mean that every truck, bus or car is legally required to have a limiter.
When a requirement may apply
As of 3 September 2026, the central requirement is category-specific, not a blanket rule for every vehicle. In its 5 December 2024 statement of Rule 118 of the Central Motor Vehicles Rules, the Ministry of Road Transport and Highways said that specified transport vehicles manufactured on or after 1 October 2015 must be equipped by the manufacturer or dealer with an AIS 018/2001-compliant speed governor, speed-limiting device or speed-limiting function, generally with an 80 km/h maximum preset, subject to the rule's exclusions.
The 80 km/h setting is not universal. The rule specifies 60 km/h for covered dumpers, tankers, school buses and vehicles carrying hazardous goods. For older vehicles, also check the applicable State or Union Territory retrofit notification and any lower required setting. The exclusions stated by the Ministry include two-wheelers, three-wheelers, quadricycles, fire tenders, ambulances, police vehicles and transport vehicles certified under Rule 126 with a maximum rated speed not above 80 km/h.
The Ministry also states that implementation of the Motor Vehicles Act and Central Motor Vehicles Rules is handled by the relevant State or Union Territory authorities. Owners and fleet operators should therefore verify the RC or permit category, manufacture date, applicable notification and required setting with the registering or transport authority before fitment.
Fitment and documentation
Use equipment appropriate for the exact vehicle and have it installed by a competent technician. Configuration, sealing and any required testing or certification should follow the applicable procedure.
Keep invoices, device details and inspection records with the fleet file. These records can support maintenance and any checks requested by an authority.
Checks for fleet operators
Review each vehicle rather than assuming one rule covers the whole fleet. Confirm category, permitted use, required limit, device compatibility and the process for recording or verifying installation.
Recheck the device during scheduled maintenance and investigate unexpected changes in performance instead of altering the setting without authorisation.
Frequently asked questions
Are speed limitation devices mandatory for every vehicle in India?
No. Applicability can depend on vehicle class, registration, permit conditions, manufacture date, jurisdiction and the rules currently in force. Confirm the exact vehicle with the registering or transport authority before treating fitment as mandatory.
Which MIJO speed limitation device is intended for trucks, buses or cars?
MIJO fuel-control speed limitation devices are for technically compatible trucks and buses, while electronically controlled devices are for technically compatible cars. The exact vehicle and installation method still need a technical assessment.
What records should a fleet retain after speed-limiter fitment?
Keep the invoice, device identity, configuration details and any sealing, test or inspection record required for that vehicle. Recheck current authority requirements for the fleet's jurisdiction.