Listed Automotive Companies in Wisconsin

Results are ordered alphabetically. Inclusion is based on the matching process or industry recorded on each published profile.

Specialties: Valve Spring RetainersValve KeysValve Spring SeatsSynchromesh Keys

Precision cold-rolled custom profiles and engineered automotive components manufacturer specializing in driveline, engine, and transmission parts....

Hastreiter Industries

📍 Madison, WI
Specialties: Precision Automotive ComponentsMachined AssembliesSecondary Processing

CNC precision machining and turning with secondary processes including annealing, anodizing, plating, powder-coating. Leader in machining capabilities...

Miniature Precision Components

📍 Walworth, WI Est. 1972
Specialties: Thermoplastic ComponentsExtruded TubingMolded AssembliesAutomotive Systems

IATF 16949:2016 certified manufacturer of thermoplastic components and assemblies for automotive applications since 1972. Part of Novares Group....

PartsBadger

📍 Cedarburg, WI
Specialties: Custom Automotive ComponentsPrecision Machined PartsCNC Turning

Custom CNC machining services for automotive industry with ISO 9001:2015 certification. Combines cutting-edge technology with traditional manufacturin...

STRATTEC Security Corporation

📍 Milwaukee, WI Est. 1908
Specialties: Automotive LocksElectronic LocksKeysIgnition Systems

Founded 1908 with 116+ years of experience manufacturing automotive locks, keys, and security systems for North American and global automotive OEMs....

Trace-A-Matic Corporation

📍 Brookfield, WI
Specialties: Precision Machined Automotive ComponentsCNC MachiningSecondary Operations

Precision machine shop services with CNC machining facilities serving aerospace, automotive, defense industries. ISO 9001, AS 9100, and ITAR registere...

Wiscon Products

📍 Green Bay, WI
Specialties: Automotive HousingsCamshaft ComponentsManifoldsPrecision Turned Parts

Wiscon Products is a precision manufacturing company based in Racine, Wisconsin, specializing in advanced CNC lathe precision turned parts and complex...

Wisconsin Metal Parts Inc

📍 Waukesha, WI Est. 1988
Specialties: Automotive StampingMetal FabricationCNC MachiningCustom Tooling

Custom metal stamping and fabrication for automotive and off-highway industries since 1988. Annual revenue of $19 million with ISO 9001:2015 and ITAR ...

Specialties: Precision Automotive ComponentsCustom Machined PartsAutomotive Assemblies

CNC machining services for automotive applications with materials from aluminum to zinc, plastic to cast iron. Single prototypes to high-volume produc...

Wisconsin automotive manufacturer landscape

Compare listed automotive manufacturer profiles in Wisconsin by process fit, location, and the documentation the buyer can actually verify.

Clusters this page covers

  • Texas assembly and supplier work around OEM and EV plants
  • Indiana, Kentucky, Tennessee, and Alabama vehicle and powertrain corridors
  • Michigan, Ohio, and Illinois tooling, stamping, and Tier supplier density
  • Southeast interior, seating, and electronics plants feeding the same OEM launch calendars

Selection rules

  1. Separate prototype shops from production suppliers. Launch and PPAP requirements are different jobs.
  2. Ask which OEM or Tier customers the plant currently ships and what quality system covers that work.
  3. Match process to the print: stamping, welding, machining, molding, coating, or assembly—not “automotive parts.”
  4. Confirm tooling ownership, spare strategy, and who pays for engineering changes.
  5. Require the same annual volume, release quantity, and packaged-delivery assumption from every quote.
  6. Use state pages when the plant has to sit inside an OEM milk-run, sequencing, or line-down recovery radius.

When to use a production supplier, a job shop, or a tooling house

An automotive manufacturer can be a production plant, a prototype shop, or a toolmaker. Those are not interchangeable awards.

When this is the jobUseWhy
A released production part with PPAP, packaging, and a weekly releaseProduction supplierThe buyer needs process capability, containment, and launch evidence—not a one-off quote.
A prototype, service part, or low-volume derivativeJob shop or prototype cellSpeed and flexibility beat a production line that is booked for OEM launches.
A die, fixture, gauge, or assembly aid that has to run production laterTooling houseThe award is tool life and tryout, not the finished vehicle part.

How to source this work

Use an automotive manufacturer when print, PPAP, IATF 16949 or OEM-customer requirements, launch timing, and repeat volume determine the award more than a one-off prototype quote.

Include in the RFQ

  • controlled drawings, CAD, and revision level
  • annual volume, release quantity, and launch date
  • material, coating, and applicable OEM or IATF requirements
  • PPAP, inspection, and capability-study scope
  • tooling ownership, spare strategy, and packaged-delivery assumptions

Questions that separate suppliers

  • Which operations stay in-house versus get subcontracted?
  • What PPAP level and capability evidence can be supplied?
  • How are engineering changes, containment, and line-down recoveries handled?

Questions this page can answer

How should a buyer compare automotive manufacturers?

Compare the process on the print, the quality system, current OEM or Tier work, and whether the plant can support launch and containment. Listed industry tags are a starting filter, not proof of current PPAP capability.

Which states are the strongest automotive manufacturing hubs on UNITEMFG?

Texas, Indiana, Tennessee, Kentucky, and Alabama are the first state-and-category pages to open for vehicle and supplier work. Michigan and Ohio remain important for tooling, stamping, and established Tier density.

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