How to Start Auto Component Manufacturing in India

Start with one part and one buyer, not with a factory. In auto component manufacturing, the part you choose decides your machines, approvals and investment. In NPCS project reports on auto parts, total capital investment runs from ₹67 lakh for a rubber parts unit to ₹4.35 crore for a forging unit.

A new unit seldom wins on price. It wins by making a part that a vehicle maker or larger supplier already buys, preferably one India still imports, and by passing that buyer's sample and quality checks. There is room: industry turnover reached ₹7.60 lakh crore in 2025-26, up 12.7%, per the industry association ACMA, as reported by Autocar Professional.

Which auto component should a first-time manufacturer make?

Choose by what you can make repeatably and who will buy it, not by market size. The table groups routes by process, which sets your machines.

Take the row where you have process knowledge or a technical partner. Leave brakes, steering and other safety parts for later, because they carry testing duties. Fasteners and bearings have their own guides on nut and bolt manufacturing and ball bearing manufacturing, and engineering business ideas lists more.

Engine components were the largest segment, at 26% of sales to vehicle makers in 2024-25, according to IBEF. Electric vehicle parts were 4.6% of domestic supplies in 2025-26, per ACMA, so engine parts are the most exposed, while brackets, bushes and body parts are used in electric vehicles too. For EV parts, see the EV spare parts business.

Who buys from a new unit: vehicle makers, larger suppliers or the aftermarket?

The channel decides how long approval takes and how thin the price is. Sales are for 2025-26, per ACMA.

A Tier-1 supplier sells directly to vehicle makers, and a Tier-2 supplier sells a part to a Tier-1. A new unit usually enters as Tier-2, which gives you an audited process and repeat orders first. Job work for an established maker is a common start, covered in the guide to contract manufacturing.

India imported components worth USD 25.4 billion in 2025-26, above the USD 24 billion it exported, mostly from China, Japan and Germany, per ACMA. A part on that import list, where a buyer wants a second local source, beats one that a dozen nearby units already make.

How is an auto component made, from drawing to dispatch?

Most parts follow these seven steps.

1. Review the buyer's drawing and specification, which fix material, tolerances and finish.
2. Buy and inspect raw material with a test certificate for each batch.
3. Form the part by forging, pressing, moulding or casting, using dies or moulds made for it.
4. Machine it to size on CNC lathes and milling machines.
5. Heat treat and finish it (hardening, plating or coating), by job work if you have no furnace.
6. Inspect each lot against the control plan and record the results.
7. Pack and label by batch, so a defect can be traced to its lot.

Which machines does a small auto component unit need?

Buy in the order your first buyer's drawing demands, and buy measuring equipment first, because a part you cannot measure cannot be approved.

What quality approvals do buyers ask for before a first order?

The buyer's checklist matters more than any licence. Plan for four things.

• IATF 16949: the automotive quality standard of the International Automotive Task Force, a group of vehicle makers and their trade associations, run through IATF Global Oversight. No law requires it, so ask each buyer in the first enquiry.
• Production part approval (PPAP): the samples, control plan and inspection records a buyer reviews before accepting a part for regular supply.
• Type approval for safety parts: ARAI's conformity-of-production page lists safety glass, brake hoses, horns, seat belts and wheel rims. If your part is listed, confirm testing with ARAI or your buyer.
• Udyam and GST registration, which buyers ask for at onboarding.

How much does auto component manufacturing cost to set up?

Machines and tooling set the number. Two NPCS project reports on auto parts show it.

Return and break-even are as listed in each report's project stats; their basis sits in the full report, so treat them as indicative. Dies and moulds, extra CNC machines, outsourced testing and working capital move the total, because buyers pay on credit while steel or rubber is paid up front. Auto parts carry a uniform 18% GST from 22 September 2025, as summarised by the law firm Lakshmikumaran & Sridharan.

The auto production linked incentive scheme is out of reach for a first unit. KPMG's summary shows its Component Champion category needed group revenue of at least ₹500 crore and fixed assets of at least ₹150 crore.

Which states and clusters suit an auto component unit?

No single state dominates, so set up near your first buyer's plant, because buyers schedule deliveries tightly. India Briefing names Chennai (Tamil Nadu), Pune (Maharashtra), Gurugram-Manesar (Haryana) and Sanand (Gujarat) as vehicle and component clusters, and IBEF's list adds Madhya Pradesh. The industry guides for Tamil Nadu and Maharashtra cover estates and incentives.

What mistakes sink a first auto component unit?

• Buying machines before a buyer shares a drawing and a trial-lot enquiry.
• Depending on one buyer for most sales, so a supplier switch there can stop your orders.
• Quoting without costing dies, testing and rejections, so the first lot loses money.

What should you do before buying the first machine?

1. Choose one part family from the first table and list the nearby plants that buy it.
2. Ask their purchase teams for a drawing, a trial-lot enquiry and their approval checklist.
3. Cost one machine line plus dies against the price they quote.
4. Complete Udyam and GST registration, and line up job work for steps you cannot do in-house.

Once a buyer shows interest, a lender will want bank-ready numbers. An NPCS project report for a forging, rubber or moulded auto parts unit sets out the process, machinery, raw materials and a year-wise financial projection for a stated capacity, in the format banks and schemes such as PMEGP and Mudra usually ask for. It supports a loan application and does not replace a buyer's order. The detailed project report guide explains that format, and other manufacturing guides sit in the how-to-start section.

Frequently asked questions

Which is the largest auto component company in India?

By stock market value, Samvardhana Motherson International leads Screener's list of listed auto component companies, followed by Bosch, Bharat Forge, Uno Minda and Schaeffler India. Rankings by revenue or profit can differ, market values change daily, and the list covers only listed companies.

What is the size of the auto component industry in India?

Turnover was ₹7.60 lakh crore (USD 85.9 billion) in 2025-26, up 12.7%, per ACMA. Imports were USD 25.4 billion and exports USD 24 billion. Other trackers publish different totals because they define the industry differently, so quote the source and year.

Which state is famous for automobile parts?

Tamil Nadu (Chennai), Maharashtra (Pune), Haryana (Gurugram-Manesar) and Gujarat (Sanand) are the clusters India Briefing names, and IBEF also lists Madhya Pradesh. Pick the cluster where your target buyer's plant stands, because buyers schedule deliveries tightly.

Do I need IATF 16949 to start an auto component business?

No law requires it. It is a quality standard, and IATF-recognised certification bodies issue the certificate. The buyer decides whether you need it. Ask in the first enquiry, and budget for certification if you plan to supply vehicle makers or Tier-1 suppliers directly.

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