Sector Guides
How to Analyze Auto Ancillary Stocks in India: CPV & BEV Share
Team QuartrlyAuto ancillary earnings hinge on Kit Value — the rupee value of components supplied per vehicle — not on vehicle production volume, which grows only 5-8% annually in India. Uno Minda's Kit Value for EV two-wheelers runs ₹25,000-30,000, versus just ₹6,000-7,000 for ICE two-wheelers, and Sona Comstar closed Q3 FY25 with an all-time-high Net Order Book of ₹23,600 crore. Companies with strong aftermarket brands like Bosch and Uno Minda add a layer of revenue diversification that OEM-only suppliers lack.
Key Takeaways
- Kit Value (Content Per Vehicle) is the most important growth driver — rising CPV allows revenue growth even when vehicle volumes are flat
- Net Order Book provides visibility into future revenue and indicates competitive positioning with OEMs
- BEV Revenue Share signals whether a company is positioned for the EV transition or faces obsolescence risk
- Pass-through lag on commodity costs can compress margins for quarters before cost recovery kicks in
- Aftermarket mix provides revenue diversification and typically carries higher margins than OEM supplies
Quick Reference
| Metric | Definition | Healthy Range | Warning Sign |
|---|---|---|---|
| Kit Value (CPV) | Component value per vehicle | EV CPV 2-4x ICE CPV | Flat CPV despite new models |
| Net Order Book | Contracted future revenue | >3x annual revenue | Book growth < revenue growth |
| BEV Revenue Share | % revenue from EV programs | >25% and growing | <5% or "wait and watch" stance |
| Pass-Through Lag | Time to recover cost increases | Quarterly resets | "Negotiating" or margin compression |
| Aftermarket Mix | % revenue from replacement parts | 15-25% | <10% indicates OEM dependence |
Understanding Auto Ancillary Metrics
Auto ancillaries operate in a B2B environment where contracts are negotiated years in advance and pricing is tied to OEM production schedules. Unlike consumer-facing businesses, revenue depends on winning platform contracts and increasing the value of components supplied per vehicle.
The sector is undergoing structural transformation as electric vehicles require different components than internal combustion engine (ICE) vehicles. Companies supplying exhaust systems or engine parts face obsolescence risk, while those supplying wiring harnesses, sensors, and battery management systems stand to benefit. Auto ancillary KPIs help investors distinguish between companies positioned for growth and those facing structural decline.
Kit Value / Content Per Vehicle (CPV)
What it is: Kit Value, also called Content Per Vehicle (CPV), measures the total value of components a supplier provides for each vehicle produced. It is expressed in rupees per vehicle and varies by vehicle segment (2-wheeler, passenger vehicle, commercial vehicle) and powertrain type (ICE vs EV).
Why it matters: Because vehicle production volumes in India grow at only 5-8% annually, ancillaries that increase their Kit Value can achieve revenue growth that outpaces industry volume growth. Higher CPV indicates the company is either supplying more components per vehicle or higher-value components.
What good looks like: Kit Value expansion of 15-20% when supplying EV platforms compared to ICE platforms indicates strong positioning. Uno Minda reported Kit Value of ₹25,000-30,000 for EV two-wheelers versus ₹6,000-7,000 for ICE two-wheelers in Q2 FY25.
Red flag: Flat or declining CPV despite new model launches suggests the company is losing content to competitors or supplying only commodity components.
Example from earnings call:
"Our potential Kit Value in EV 2W is significantly higher at ₹25,000 to ₹30,000 compared to ICE 2W which is around ₹6,000 to ₹7,000." — Uno Minda Q2 FY25 Earnings Call
Net Order Book
What it is: Net Order Book represents the total value of signed contracts and confirmed orders that are yet to be executed. It includes orders expected to be delivered over a specified period, typically 5-7 years for auto ancillaries.
Why it matters: Order Book provides visibility into future revenue and indicates the company's success in winning new programs from OEMs. A growing Order Book suggests strong competitive positioning and customer confidence.
What good looks like: Order Book exceeding 3x annual revenue indicates strong future visibility. Sona Comstar reported an all-time high Net Order Book of ₹23,600 crore in Q3 FY25. Order Book growth should match or exceed revenue growth to indicate sustained momentum.
Red flag: Order Book growth slower than revenue growth suggests the company is consuming backlog faster than replenishing it, indicating potential future revenue decline.
Example from earnings call:
"We closed the last quarter with an all-time high net order book of ₹23,600 crore... looking at customer schedules and a strong order book, we are certain that electrification will drive growth." — Sona Comstar Q3 FY25 Earnings Call
BEV Revenue Share
What it is: BEV (Battery Electric Vehicle) Revenue Share is the percentage of total revenue derived from components supplied for electric vehicle programs. It is calculated by dividing BEV-related revenue by total revenue.
Why it matters: This metric indicates whether a company is positioned for the EV transition. Companies with high ICE-specific revenue (exhaust systems, fuel injection, engine components) face obsolescence risk as EV adoption accelerates.
What good looks like: BEV Revenue Share above 25% and growing quarter-over-quarter indicates strong EV positioning. Sona Comstar reported 32% BEV revenue share in Q3 FY24, demonstrating successful transition to EV programs.
Red flag: BEV Revenue Share below 5% or management statements indicating the company is "waiting to see" EV adoption trends suggest lack of strategic positioning for the transition.
Example from earnings call:
"Our BEV revenue share has increased to 32% of total... comprised ₹365 crore for the quarter despite global inventory destocking." — Sona Comstar Q3 FY24 Earnings Call
Pass-Through Mechanism
What it is: Pass-through mechanism refers to contractual provisions that allow auto ancillaries to recover increases in raw material costs (steel, copper, aluminum, plastics) from their OEM customers. Recovery typically occurs through periodic price adjustments, usually quarterly.
Why it matters: Auto ancillaries have limited pricing power as component prices are negotiated in advance. When commodity prices rise sharply, there is a time lag before cost increases can be passed on to OEMs, temporarily compressing margins.
What good looks like: Quarterly pass-through reset clauses with major OEM customers indicate stronger negotiating position. Companies with diversified customer bases typically have better pass-through terms than those dependent on a single OEM.
Red flag: Management statements about "negotiating with customers" on cost recovery or "absorbing costs in the near term" indicate weak pass-through mechanisms. Gross margin compression during periods of rising commodity prices without corresponding revenue growth warrants scrutiny.
Example from earnings call:
"Material prices have continued to increase... we expect pressure on EBITDA margin to continue in the near term due to the lag in pass-through mechanisms." — Sona Comstar Q3 FY22 Earnings Call
Aftermarket Mix
What it is: Aftermarket Mix is the percentage of total revenue derived from replacement parts and accessories sold through distributors, retailers, and service centers, as opposed to OEM supplies for new vehicle production.
Why it matters: Aftermarket revenue is typically more stable than OEM revenue because replacement demand is driven by the existing vehicle parc rather than new vehicle production. Aftermarket sales also generally carry higher margins due to smaller order sizes and brand premiums.
What good looks like: Aftermarket mix of 15-25% provides healthy revenue diversification for component suppliers. Companies with strong brand recognition in the replacement market (Bosch, Uno Minda) can command premium pricing.
Red flag: Aftermarket mix below 10% indicates high dependence on OEM production cycles. Companies with minimal aftermarket presence are more vulnerable to OEM production cuts or model discontinuation.