Certified ISO/SAE 21434 Automotive TARA Compliance Firms
The search is specific because the need is: a firm that produces TARAs auditors accept, ISO/SAE 21434 Clause 15 methodology, attack paths traced to your actual vehicle architecture, risk acceptance criteria your program board can sign.
The agencies below are automotive-certified and verified on the evidence that matters: type-approval track records with European and APAC regulators, and technical penetration-testing matrices covering the interfaces R155 assessors probe.
What renders on this page
- ▸Filtered list of automotive-certified agencies
- ▸Type-approval track records with European and APAC regulators (KBA, RDW, VCA, MLIT)
- ▸Technical penetration-testing matrices by interface
- ▸Direct "Request Secure RFP" form pre-wired to the UN R155 template
What a compliant TARA looks like
Assets and threats mapped to the real system, domain controllers, gateways, zonal ECUs, CAN-FD and Ethernet buses, external interfaces from V2X to OTA. Clause 15 methodology with Annex E guidance, impact and likelihood ratings that produce treated risk values, and traceability from threat to control. Generic threat lists fail audit; directory case records show firms producing program-level TARAs that passed.
Authority track records, verified
KBA, RDW, VCA, and MLIT processes differ in what they examine and how they examine it. Directory records document which authorities each firm has supported through, because prior audit success with your authority is the strongest predictor of your audit outcome.
Penetration testing matrices
Interface-by-interface records: telematics units, OTA update paths, V2X, OBD-II diagnostics, key fob and TPMS surfaces, at automation levels from L0 through L4. Testing findings feed back into TARA risk ratings, closing the loop that auditors look for between validation and analysis.
Send a secure RFP
The UN R155 RFP template captures vehicle programs, target markets, SOP dates, and CSMS maturity. Certified agencies respond with standardized proposals (methodology, staffing, schedule) comparable line by line.
What iso 21434 tara firm automotive engagements typically cost, and what drives the price
No honest page quotes a single number, because the price of iso 21434 tara firm automotive work varies by scope. The drivers that move quotes are fleet and platform complexity, the number of vehicle types, ECUs, and suppliers in the engineering scope, whether you need a CSMS built, audited, or both, building a management system from scratch is a different engagement than certifying an existing one, and the certification route and target markets: KBA, RDW, VCA, and MLIT each shape the evidence package. For real numbers, use structured RFP responses with real quotes from CSMS and ISO 21434 consultancies listed in the verified directory.
How long it takes
UN R155 type approval requires an approved CSMS before vehicle type approval, the CSMS work is the critical path, and certification bodies' audit calendars fill up ahead of type-approval deadlines.
TARA work follows the vehicle development cadence: item definitions gate it, not consultant availability.
Post-audit remediation is the schedule risk most teams underestimate, build slack for findings.
What to prepare before you engage a firm
The firms you are about to compare will scope faster (and quote more accurately) if you arrive with your item definitions and any existing TARA drafts, even partial ones, evidence of your development process: configuration management, supplier management, vulnerability-handling procedures, the target approval authorities and markets, which determine the evidence package, and a named engineering owner for the CSMS, it is a management system, and it needs an internal owner.
Common mistakes to avoid when choosing
starting CSMS work after committing to a type-approval date, the CSMS audit is on the critical path to vehicle approval
commissioning a TARA without agreeing what counts as an 'item' across your platform, scope disputes are where these engagements stall
treating the CSMS as a consulting deliverable rather than a management system your organization must operate after the certificate
What happens after you engage
A well-run iso 21434 tara firm automotive engagement follows a predictable arc: a gap assessment against UN R155 CSMS requirements and ISO/SAE 21434, then a work plan for the management system itself, policies, processes, and the evidence trail auditors sample, then the audit cycle with your chosen approval authority, including remediation of findings, and finally type-approval submission support and the handoff to whoever operates the CSMS internally. If a firm cannot describe this arc for your environment, that itself is a finding.
Frequently asked questions
How do I know a firm is genuinely 21434-capable?
Check three things in the directory: named TARA practitioners and 21434 Lead Assessors, program-level TARA case records with outcomes, and authority-specific type-approval experience. Certification logos are not evidence; holder names and audit outcomes are.
Can one firm produce the TARA and the CSMS evidence?
Yes, and coherence is a benefit: the TARA anchors the CSMS artifacts auditors sample. Verified firms here handle both, plus UN R156 SUMS where software update evidence is needed in the same engagement.
What does automotive TARA production cost?
Program-scoped TARAs at verified firms run $300–$400+/hour for senior staff; a single-program TARA typically lands mid five figures. The RFP template captures vehicle type, automation level, and interfaces so scope is explicit before quotes arrive.
How much does UN R155 CSMS certification support cost?
It depends on fleet complexity, whether the CSMS exists or must be built, and the approval route, the drivers above. Structured RFP responses from the consultancies in the verified directory return real quotes for your scope; do not budget from generic online ranges.
How long does CSMS certification take?
The build-out is the variable: certifying a mature system is an audit cycle, building one is an engineering program. Approval-authority audit calendars also constrain timing, start from your type-approval deadline and work backward.