If you build, sell, or operate electric vehicles in India, one date should already be on your calendar: October 1, 2026. That’s when AIS-173 makes Acoustic Vehicle Alerting Systems mandatory for every new electric vehicle model launched in the country.
This isn’t a distant regulatory update. It’s a deadline with real consequences for anyone who hasn’t already locked in a compliance plan.
What AIS-173 actually requires
AIS-173 sets out the technical requirements for AVAS on electric and hybrid vehicles, covering sound pressure levels across a range of frequencies, how the sound must change with vehicle speed, and behavior in both forward and reverse motion. It’s closely aligned with the international UN R138 standard, which makes it easier for manufacturers already building for export markets to align their AVAS design across both requirements without maintaining two separate systems.
The standard applies to M category (passenger vehicles), N category (goods vehicles), and applicable L category (two- and three-wheeler) electric vehicles, which covers most of what’s currently being manufactured and sold as EVs in India.
The two-part deadline
AIS-173 compliance isn’t a single cutoff. It’s staged by vehicle status:
- New EV models — 1 October 2026. Any electric vehicle model launched from this date must already have a compliant AVAS integrated.
- Existing EV models — 1 October 2027. Vehicles already in production or on the road get an additional year to comply, but compliance is still mandatory by that date.
The year of runway for existing models sounds generous, but retrofitting a fleet or an existing production line at scale takes real lead time; sourcing, installation, and validation all have to happen before the deadline, not on it.
What OEMs should be doing now
For OEMs with new models in the pipeline, the practical compliance timeline is shorter than the regulatory deadline suggests. AVAS needs to be part of the vehicle’s electrical architecture from early in the design process; its power source, CAN bus integration, and mounting all have implications for how and when it can be added. Treating it as a late-stage bolt-on risks delays that push past the deadline itself.
A few things worth confirming now if you haven’t already:
- Supplier selection. Is your AVAS supplier’s product actually compliant with AIS-173 and UN R138, and can they demonstrate it with real test documentation, not just a compliance claim?
- Integration timeline. Does the supplier’s design-in process fit your production schedule, or does it require redesigning parts of your existing electrical architecture?
- Testing and validation. Has the unit been through EMI/EMC and functional testing at an accredited facility? This matters for your own homologation process, not just the AVAS vendor’s claims.
What fleet operators should be doing now
If you operate an existing EV fleet, October 2027 might feel far away, but retrofitting isn’t instantaneous. Sourcing enough units for a full fleet, scheduling installation without disrupting operations, and validating each vehicle post-installation all take time. Starting the retrofit conversation a year out from the deadline, rather than a month out, is the difference between an orderly rollout and a scramble.
Choosing between imported and domestic AVAS suppliers
One decision OEMs and fleets are weighing right now is whether to source an EV alert sound system from an international Tier-1 supplier or a domestic manufacturer. Imported systems often carry higher landed cost and longer supply chains, with limited local support if something needs adjusting post-installation. Domestically manufactured systems, when properly engineered and tested, can offer comparable compliance at a lower cost with faster support, worth factoring into a decision that’s ultimately about meeting a fixed regulatory deadline, not just picking a familiar brand.
This is where Infiquity AVAS fits in. IQ-AVAS | KARNA, built by Infiquity Auto Technologies in Bengaluru, is engineered for AIS-173 and UN R138 compliance, tested for EMI/EMC performance at an NABL-accredited facility, and designed to integrate across passenger cars, three-wheelers, buses, and commercial EVs.
If you’re evaluating IQ-AVAS for EV or PHEV platforms, the Infiquity EV Alert Sound team can walk through integration timelines against your production schedule directly.
The deadline isn’t moving. The only real decision left is how early to start.
