What every auto components inspection covers
A vehicle part either fits and works in its application or it does not, so the drawing and the part number drive every check. Whatever the part, the inspector works through the same core steps before the product-specific ones:
- Identity. Part numbers, drawing revision, vehicle application and assortment checked against the purchase order, with cartons opened at random.
- Dimensions. Critical and fit dimensions measured with calibrated micrometers, bore gauges, height gauges, thread plug and ring gauges, and the buyer's own fixtures where supplied. Calibration certificates of the factory's gauges are checked.
- Surface and material soundness. Blowholes, porosity, cracks, laps, burrs, swarf in bores and oil passages, plating and paint defects.
- Records. Material certificates (often EN 10204 type 3.1) traced by heat or batch number, heat-treatment charts, hardness logs and the factory's inspection reports.
- Witnessed tests. Tests the factory runs on its own equipment, such as hardness, shear, leak or crack detection, carried out on parts the inspector picks.
- Marking and packing. Approval marks, batch and date codes, brand and origin marking, rust prevention and carton strength.
Sampling follows ISO 2859-1; see the AQL guide. Many buyers set tighter limits for auto parts than for consumer goods and ask for critical dimensions to be checked on more pieces. Each finding is classed critical, major or minor, and the report ends in one verdict: Cleared to load, Hold or Not cleared.
Aftermarket and OE supply: where inspection fits
Much of India's auto component output goes to vehicle makers (OEs) and their tier-one suppliers. That supply runs under the customer's own quality system. The plant is usually certified to IATF 16949, the automotive quality management standard, by a certification body recognised by IATF. Each new or changed part goes through PPAP, the Production Part Approval Process published by AIAG, before the customer approves it. The OE's supplier quality engineers own that approval.
Aftermarket buyers are in a different position. A distributor or brand importing brake pads, clutch plates or bicycle parts may buy hundreds of part numbers from several factories and has no engineer on site. Their risks are wrong application, worn tooling, swapped materials, missing approval marks and rust in transit. This is where an independent inspection is most useful.
Our position on the buyer's system is simple:
- We inspect parts against your drawing, your PPAP pack or your approved sample. We do not approve a PPAP; only the customer does.
- We can check that an IATF 16949 certificate is current and covers the plant and the products, but we do not certify plants or audit to IATF 16949.
- Our factory audit is a scored capability and quality audit. It is not an IATF 16949 audit.
How the checklist changes by product
| Product | Main risk | What the inspector adds |
|---|---|---|
| Brake parts | Pad or disc that does not fit, or lacks the approval or copper-content marking the market requires | Profile against a template, witnessed shear test, disc runout and thickness variation, approval and LeafMark checks |
| Engine and transmission components | Tight tolerances, wrong heat treatment, dirty parts | PPAP and CMM report review, case-depth and hardness records, cleanliness records, weight grading |
| Two-wheeler parts | Many small part numbers; lamps and mirrors without valid approval marks | Application and assortment checks, E-mark and DOT marking, cable, chain and lever function |
| Bicycle parts | Frames and forks that fail fatigue tests; thread standards mixed | Alignment, weld and thread checks on site; frames and forks sealed for an ISO 4210 lab |
Castings, forgings and fasteners used in vehicles have their own pages: iron castings, steel forgings and fasteners.
Market rules that shape the checklist
| Market | Rule | What it means at the factory |
|---|---|---|
| EU and other countries applying it | UN Regulation No. 90: approval of replacement brake lining assemblies, drum brake linings, discs and drums | Approval mark, batch or date on each part; sealed axle-set packs. Approval comes from a type-approval authority, not from us |
| Washington and California | Brake friction material laws: from 1 January 2025, less than 0.5% copper by weight; asbestos and listed heavy metals limited | LeafMark and certification proof on pads and packaging, matched to the formulation shipped |
| US | FMVSS 108 (49 CFR 571.108) covers lamps and reflectors, including replacement equipment | "DOT" on headlamp lenses; lamp type matches the photometric test report |
| US | 16 CFR 1512 bicycle requirements | Parts must let the assembled bicycle meet the rule; reflectors and markings checked |
| EU | REACH, including the asbestos ban in Annex XVII | Supplier declarations; samples to a lab where the buyer asks. See EU REACH |
| All | Origin marking | "Made in India" on part or pack as required. See country of origin labelling |
Approval marks are only as good as the approval behind them. The inspector compares the mark on the part with the approval certificate or test report the factory supplies, and records any mismatch.
Where auto components are made in India
The Automotive Component Manufacturers Association of India (ACMA) reported in July 2026 that the industry's exports rose 5% to US$24 billion in FY2025-26, against imports of US$25.4 billion (as reported by Autocar Professional, 7 July 2026). A year earlier, ACMA's review of 8 July 2025 put FY2024-25 exports at US$22.9 billion, up 8%, against imports of US$22.4 billion. North America took 32% of exports and Europe 29.5%. ACMA's figures exclude tyres, batteries, paints and consumables. EEPC India, using DGCI&S data, puts auto component exports at US$3,905.0 million for April to August 2026, up 7.1% on a year earlier.
We name a cluster only where an official source supports it. None of these is a Town of Export Excellence.
| Place | Source | What it shows |
|---|---|---|
| Kolhapur district, Maharashtra | DC-MSME list of ongoing Common Facility Centres under MSE-CDP (updated 20 March 2024) | Engineering and Auto Component Cluster, Yadrav; and Hi-Tech Engineering Cluster, Kolhapur |
| Kolhapur | TERI cluster profile for SIDBI, 2012 | Most of the foundry cluster supplies the automotive sector, with castings such as cylinder heads and clutch housings |
| Belagavi district (Chikkodi), Karnataka | DC-MSME list of ongoing Common Facility Centres (as above) | Auto and General Engineering Cluster, Chikkodi |
| Ludhiana, Punjab | Indian Institute of Public Administration study of Udyam registration data | Bicycle parts manufacturing named as one of the city's prominent sectors |
Booking an auto components inspection
Clear To Load is based in Jodhpur, with inspectors in Jaipur, Saharanpur, Moradabad, Delhi NCR and Kolkata, and covers every city in India. An inspection costs US$249 per man-day. Kolhapur, Belagavi and Ludhiana are outside our base cities, so travel is charged at actual cost; see pricing.
For a new part or a new supplier, start early. A pre-production inspection checks first-off parts, material certificates and tooling against the drawing before the run. A pre-shipment inspection checks the finished lot, and container loading supervision covers the count and stowage of heavy cartons. Send the drawings with revision, the part list, approval certificates and any PPAP pack you hold. The product pages below cover each type in detail.
Sources
- Autocar Professional: ACMA FY2025-26 industry review (7 Jul 2026)
- ACMA: Industry Performance Review FY2024-25, press release of 8 July 2025
- EEPC India: Analysis of Indian Engineering Exports and Imports, August 2026 (DGCI&S data)
- DC-MSME: Ongoing Common Facility Centres under MSE-CDP (updated 20 March 2024)
- TERI for SIDBI: Cluster Profile Report, Kolhapur Foundry Industry (2012)
- IIPA GyanKosh: Spatial organisation and economic impact of manufacturing sectors in Ludhiana, a cluster analysis
- UN Regulation No. 90, replacement brake parts (EUR-Lex)
- Washington State Department of Ecology: Better Brakes Law
- IATF Global Oversight