Sona Comstar commercialises three products during Q2 FY27

Sona Comstar commercialised a helical limited slip differential for passenger cars and SUVs, railway air springs and a rear radar sensor for two-wheelers in Q2 FY27. Management said this was its highest number of product commercialisations in one quarter, while the differential and radar sensor each received disclosed customer orders.

What products did Sona Comstar commercialise in Q2 FY27?

Sona Comstar commercialised three products in Q2 FY27: a helical limited slip differential, or LSD, for passenger cars and sport utility vehicles; air springs for railways; and rear radar sensors for two-wheelers. Management described three commercialisations as the company’s highest number in a single quarter, extending across automotive driveline, railway suspension and vehicle-safety applications.

The products address separate functions and end markets. The helical LSD manages speed differences between driven wheels, the air spring forms part of a railway coach’s suspension, and the radar sensor is intended to warn a rider about rear-end collision risk or a vehicle in a blind spot. Sona Comstar’s Q2 revenue rose 35% year on year to Rs 1,546 crore during the quarter of these launches.

How does Sona Comstar’s helical LSD work?

Sona Comstar’s helical LSD improves traction by limiting an excessive speed difference between two driven wheels. The product uses parallel-axis helical pinions interacting with side gears to generate internal axial and radial forces, creating a passive mechanism rather than one requiring external actuation.

Management said the mechanism provides smooth, progressive torque transfer without a conventional clutch pack. LSDs are typically used in performance vehicles, off-road SUVs and 4x4 vehicles. Sona Comstar disclosed that its Q2 order for the helical LSD came from an existing battery electric vehicle, or BEV, customer and increased its penetration in another geography.

Management characterised the helical LSD as among Sona Comstar’s most advanced and highest-value driveline products for cars. The launch comes alongside continuing expansion in established driveline lines: differential assemblies and differential gears combined grew 37% year on year, according to management, showing that the conventional driveline portfolio also grew while the new system entered commercialisation.

What do Sona Comstar’s railway air springs do?

Sona Comstar’s air springs are designed as the secondary suspension in modern railway coaches, including Linke Hofmann Busch, or LHB, coaches. In the two-stage arrangement outlined by management, primary coil springs filter high-frequency track vibrations, while the air spring connects the bogie to the coach body.

The air spring is intended to maintain constant ride height, isolate coach-body movement and improve passenger comfort. Management said that, together with dampers that control oscillations, the system can provide smoother and safer movement at high speeds. Sona Comstar did not disclose an air-spring customer, order value, production volume or a timetable beyond its Q2 FY27 commercialisation.

The railway launch adds a suspension component to a portfolio where management said automotive represented 70% of revenue and non-automotive represented 30%. In H1 FY27, management said suspension motors accounted for 7% of revenue and had reached the scale of the railway brake-system business, illustrating the growing role of newer product categories alongside established railway operations.

Why is Sona Comstar supplying rear radar sensors for two-wheelers?

Sona Comstar’s rear radar sensor is intended to warn a two-wheeler rider of a potential rear-end collision or a vehicle in a blind spot. Management said timely warnings can give riders more time to manoeuvre to a safer position, citing the vulnerability of two-wheelers on the road.

The Q2 radar order came from a new Indian two-wheeler customer, marking Sona Comstar’s first engagement with that customer. The award adds radar sensing to Sona Comstar’s existing two-wheeler traction-motor and controller offering. Management said this opened a new market rather than only increasing supply to an existing customer.

Two-wheelers and three-wheelers accounted for 14% of Sona Comstar’s revenue in the period discussed on the call. The radar product therefore expands the company’s offering in a vehicle category where it already sells powertrain products, but does so through a sensing and safety application rather than another motor or controller programme.

How do the launches fit Sona Comstar’s product strategy?

The three launches support Sona Comstar’s stated shift from an electrification priority to “EPIC mobility,” meaning Electric, Personalised, Intelligent and Connected solutions. Management said the revised priority reflected order wins in robotics, physical artificial intelligence and other intelligent and connected solutions; among the three launches, the radar sensor most directly fits the intelligent and connected element.

The products were commercialised in a quarter when Sona Comstar secured Rs 3,600 crore of new business and closed Q2 with a net order book of Rs 25,100 crore. Management said the new wins covered differential assemblies, gears, traction motors, controllers, starter motors, sensors and railway products. The disclosed helical-LSD and radar-sensor awards provide identified Q2 commercial programmes for two of the three launches.

Sona Comstar said traction motors and suspension motors, developed through in-house research and development over the past four years, had a combined annualised revenue run rate of Rs 1,400 crore. BEV revenue grew 129% year on year in Q2 and represented 51% of automotive product sales. The three launches broaden that product base into conventional passenger vehicles, railways and two-wheeler safety systems.

What commercial milestones should readers track after these launches?

The first commercial milestones are customer programmes and production progress for the railway air spring, more rear-radar adoption by two-wheeler manufacturers, and additional helical-LSD awards. Sona Comstar disclosed the customer type for the LSD and radar orders but gave no order value, volume or comparable air-spring customer disclosure in Q2 FY27.

Management also reported 75 EPIC programmes across 37 customers at the end of H1 FY27, including 44 in production and 31 yet to start production. That split provides a disclosed measure for following the conversion of Sona Comstar’s wider product-development and order pipeline into production revenue in later periods.

Conclusion

Sona Comstar’s Q2 FY27 activity combines a higher-content driveline product, a railway suspension component and a two-wheeler sensing system in one quarter. The helical LSD and rear radar sensor had disclosed orders, while the air spring adds another railway subsystem. Together, the launches expand the functions Sona Comstar can supply across road and rail markets.

The next point to watch is the start of production for the 31 EPIC programmes that had not yet entered production at the end of H1 FY27. Management’s disclosed plans and customer awards also leave open whether the railway air spring gains named programmes, whether the radar sensor wins further two-wheeler customers, and whether the helical LSD secures additional geographic or vehicle applications.