India's Auto Tech Shift: Wiring Harness & ISG Boom

India's two and three-wheeler (2W/3W) automotive sector is undergoing a major technological evolution, presenting substantial growth prospects for component manufacturers. The adoption of technologies like Integrated Starter Generators (ISG) is increasing, with ISG-equipped vehicles expected to reach 84 lakh units by FY26.

This technological advancement is notably boosting the wiring harness market. As vehicles incorporate more electronics and electrified powertrains, wiring harnesses are becoming more complex and valuable. The domestic 2W wiring harness market is forecasted to expand at a 14% CAGR between FY26 and FY31.

The electric vehicle (EV) segment offers even greater potential. While the internal combustion engine (ICE) wiring harness segment is expected to grow at 8-10%, the EV segment is anticipated to surge at a 38-41% CAGR.

Dhoot Transmission, a leading auto electricals manufacturer, holds a significant 38% share in India's 2W wiring harness market. Its EV component revenue grew by 79.2% year-on-year in Q1 FY27, contributing 27% to its total revenue, with expectations to exceed 30-32% soon.

SEDEMAC Mechatronics specializes in control-intensive Electronic Control Units (ECUs), essential for vehicle functions. The company is a key player in the Integrated Starter Generator (ISG) market, capturing 80% of India's 2/3-wheeler ISG volume growth in FY26. Its innovative sensorless technology is also being applied to EV motor control units.

Both companies are expanding their capacities to meet rising demand. Dhoot is investing ₹1,000 crore in capex and increasing wiring harness capacity to 160 lakh units by June 2027. SEDEMAC is tripling its facility size, with a new plant scheduled to commence dispatch in Q2 FY27.

Financially, Dhoot reported Q1 FY27 revenue growth of 49.7% to ₹1,446.4 crore, with net profit up 37.8% to ₹132.7 crore. SEDEMAC saw revenue increase by 43% to ₹310 crore in Q1 FY27, and net profit surged 95% to ₹33 crore.

Despite strong performance and growth, both companies trade at a premium valuation. Dhoot benefits from its wiring harness leadership and EV growth, while SEDEMAC offers higher margins and dual exposure to ICE and EV platforms. Sustained volume growth and strong execution will be crucial for these companies to justify their valuations.