ISO 9001 is the general quality management standard for any organization. IATF 16949 is the automotive standard, and it is not a standalone system: it is used together with ISO 9001 and adds automotive requirements on top. If you make production or service parts for automotive customers who require it, you need IATF 16949, which means you meet ISO 9001 as well. Everyone else usually only needs ISO 9001.
The short version
| ISO 9001 | IATF 16949 | |
|---|---|---|
| What it is | A quality management system standard for any industry | Automotive quality management requirements used together with ISO 9001 |
| Who publishes it | ISO, the International Organization for Standardization | IATF, the International Automotive Task Force |
| Who it is for | Any organization, any size, any sector | Sites that make automotive production or service parts |
| Stands alone? | Yes | No. You meet ISO 9001 and IATF 16949 together |
| Customer requirements | Meet customer and legal requirements | Also meet each automotive customer's customer-specific requirements |
| Core tools | Not required by name | Expected in practice: APQP, FMEA, MSA, SPC and PPAP, usually through customer requirements |
| Certification | Through an accredited certification body | Only through an IATF recognized certification body, under the IATF rules |
What IATF 16949 adds
- Customer-specific requirements. Each automotive customer publishes its own extra rules, and they become part of what you are audited against.
- Product safety. A defined process for safety related parts and characteristics, from design through production and change.
- Problem solving and error-proofing. A documented problem solving method and the use of error-proofing, not just inspection, to stop repeats.
- Measurement systems. Measurement system analysis for the gages named in the Control Plan, and stricter rules for calibration and labs.
- Supplier development. Monitoring supplier performance, developing weak suppliers and auditing them where the risk calls for it.
- Process and product audits. Manufacturing process audits and product audits on top of the system audit, plus contingency planning and warranty management.
Which one do you need?
- Automotive production or service parts: your customers will usually require IATF 16949. Check their supplier requirements manual.
- Automotive, but not production parts (tooling, equipment, aftermarket only): IATF certification is usually not available or not required. ISO 9001 plus the customer's rules is common.
- Any other industry: ISO 9001, or the sector standard your customers ask for, such as AS9100 for aerospace.
ISO 9001 was revised in 2026 and IATF 16949 has a new edition planned. This page covers what holds across editions. Check your certification body and customer requirements for the edition and transition dates that apply to you.