IATF 16949 vs ISO 9001
Short answer
ISO 9001 is the generic quality management standard for any organisation. IATF 16949 is not a separate system: it is a supplement that must be used together with ISO 9001 and adds automotive requirements such as customer-specific requirements, product safety, the core tools (APQP, PPAP, FMEA, MSA, SPC), control plans, manufacturing process audits and stricter problem solving. A plant making production parts for automotive customers usually needs IATF 16949; everyone else uses ISO 9001.
Side by side
| Aspect | ISO 9001 | IATF 16949 |
|---|---|---|
| Scope | Any organisation, any industry | Sites making production and service parts for automotive |
| Stand-alone | Yes | No: used together with ISO 9001 |
| Customer-specific requirements | Only as customer requirements in general | Must be identified and deployed into the processes |
| Core tools | Not required | APQP, PPAP, FMEA, MSA and SPC expected |
| Internal audits | QMS audit programme | QMS, manufacturing process and product audits (9.2.2) |
| Certification | Any accredited certification body | Only IATF-recognised certification bodies, stricter audit rules |
| Product safety, contingency plans | Not explicit | Explicit requirements (4.4.1.2, 6.1.2.3) |
Which one do you need?
If your customer is a vehicle manufacturer or a tier supplier and you make parts that go into the vehicle, the customer will normally require IATF 16949. Suppliers of tooling, equipment or indirect material usually only need ISO 9001, sometimes with selected IATF requirements added through the purchase contract.
ISO 9001:2026
ISO 9001:2026 was published in September 2026. Because IATF 16949 builds on ISO 9001, check the IATF announcements for how and when the changes are adopted in the automotive scheme.