Automotive wire harness is a distinct category from the general harness work discussed in our JST and Molex pages. The connector ecosystems overlap, but the process requirements are tighter: IATF 16949:2016 quality system, AEC-Q200 component qualification, PPAP documentation, and specific test protocols from LV 214, USCAR-2, and SAE standards. We run automotive programs on dedicated production cells physically separate from consumer work. Current active programs cover ICE powertrain, hybrid, full-EV, and ADAS. MOQ typically 500 sets for production; prototypes from 20 pieces.
Automotive Harness Categories We Build
Most vehicles group wire harnesses by location and environment. The requirements differ meaningfully between them:
| Category | Temperature Range | Sealing | Typical Connectors |
|---|---|---|---|
| Engine bay / powertrain | -40 to +125 °C | IP67 sealed | Molex MX150, TE AMP Superseal, Deutsch DTP |
| Transmission | -40 to +150 °C | IP67 / IP69K | Deutsch DTP, special high-temp housings |
| Cabin / interior | -40 to +85 °C | Non-sealed | Molex MX150, Mini50, Aptiv GT, JAE MX19 |
| Door / hinge | -40 to +85 °C | Partially sealed | Molex MX150, with high-flex wire (1M+ cycles) |
| Battery pack (EV / hybrid) | -40 to +85 °C | IP67 / IP6K9K | HVIL connectors, HSAutoLink, orange HV wire |
| Charging (EV) | -30 to +85 °C | IP67 | CCS1/CCS2/GB-T inlet connectors, OBC harness |
| ADAS / infotainment | -40 to +85 °C | Non-sealed (in-cabin) | FAKRA, HSD, Mini50 for low-current signal |
Most production programs cover 2-3 of these categories in different variants per vehicle model. Tell us which subsystem you’re working on and we scope the build accordingly.
Connector Ecosystem for Automotive
Automotive doesn’t standardize on one connector brand. Reference designs typically specify a mix of vendors based on regional OEM preferences and subsystem requirements:
- Molex MX150 / MX120 / Mini50 — dominant in North American OEMs and Tier-1 suppliers. Sealed IP67 variants for engine bay, non-sealed for cabin. See our Molex connector harness page for full Molex detail.
- TE Connectivity AMP Superseal, MCP, Tyco series — European OEM standard (VW, BMW, Daimler often specify TE). Superseal 1.5 mm is common for cabin electrical modules.
- Deutsch DT, DTM, DTP — heavy-duty, commercial vehicle, and off-road equipment. DTP handles higher current (25 A+) and extreme environments.
- Aptiv (formerly Delphi) GT series — common in GM and Stellantis vehicles. GT 150 and GT 280 are the most specified variants.
- Yazaki and Sumitomo equivalents — Japanese OEM supply chain (Toyota, Honda, Nissan). Often spec’d by part number on Tier-1 drawings.
- FAKRA connectors — automotive RF for GPS, radar, V2X, LTE modem. Color-coded by signal type — neutral white, purple, green, and others — each color representing a specific RF function per the DIN 72594 standard.
- HSD (High-Speed Data) — Rosenberger-designed connector family for automotive Ethernet, APIX, and high-speed ADAS camera video. Replacing LVDS and analog video in modern vehicles.
- HVIL / HSAutoLink / HFM — high-voltage interlock connectors for EV battery packs. Safety-critical — the interlock loop has to break before high-voltage exposure is possible during service.
We maintain authorized distribution relationships with Molex, TE, Aptiv, and Rosenberger. For Yazaki and Sumitomo parts, we source per program requirement, typically through Japanese distributors.
EV-Specific Harness Work
EV and hybrid programs have grown from a small fraction to roughly 35% of our automotive harness output in the past three years. The work breaks into specific subsystems that don’t exist in ICE vehicles:
HVIL (High Voltage Interlock Loop) harnesses. Required on every high-voltage circuit in EVs and hybrids. A low-voltage signal loop runs through every high-voltage connector; if any connector is disconnected, the BMS opens the main contactors within milliseconds. Our HVIL harness work uses dedicated connectors (Molex HVAC, TE HVA 280, HSAutoLink) with built-in interlock contacts.
Battery pack internal harnesses. High-voltage bus bars inside the pack, BMS cell voltage sensing lines (CAN or LIN-based), coolant loop sensors, and pack-to-PDU orange harnesses. Orange jacket is the global safety convention for voltages above 60 V DC. Wire gauge runs from 32 AWG (BMS sensing) to 4 AWG (main pack output). See our battery pack harness page for detail on pack-specific builds.
DC fast charging harnesses. CCS1 (North America), CCS2 (Europe), GB/T (China), and increasingly NACS (North America Tesla standard) charging inlet harnesses. These carry up to 500 A during DC fast charging sessions and include temperature sensors for thermal monitoring of the connector during charging.
OBC (On-Board Charger) and DC-DC harnesses. AC side wiring from the charge port to the OBC, DC side from OBC to the battery. High-voltage shielded construction for EMI control during charging.
ADAS and Vehicle Electronics Harnesses
Newer vehicles ship with increasingly complex electronics. Common ADAS and infotainment harness categories:
Camera harnesses. Forward camera, surround-view, driver monitoring, and rear-view cameras all use MIPI CSI-2 at the sensor, then serialize to GMSL or FPD-Link over FAKRA or HSD connectors for the run to the ADAS ECU. See our MIPI cable page for MIPI-side construction.
Radar harnesses. 77 GHz and 79 GHz radar modules use FAKRA connectors (green for GPS, white for radar, neutral for other) with shielded coax to the central ADAS processor.
Automotive Ethernet backbone. HSD connectors for 100BASE-T1 and 1000BASE-T1 in-vehicle Ethernet replacing older CAN/LIN for high-bandwidth applications.
Antenna harnesses. Shark-fin antenna modules housing GPS, LTE, V2X, and FM/AM connect through multi-FAKRA harnesses to the telematics control unit. See our RF cable page for antenna cable construction.
Compliance, Testing, and Documentation
Automotive programs require substantially more documentation than consumer or industrial work. Our standard scope:
- IATF 16949:2016 QMS — current certification, annual surveillance audit, dedicated automotive production cells. Full details on our quality and certifications page.
- APQP (Advanced Product Quality Planning) — five-phase planning aligned with AIAG standard. Timeline typically 8–12 weeks from kickoff to PPAP submission.
- PPAP (Production Part Approval Process) — Level 1-5 support. Level 3 is standard for new programs; Level 5 on request with full sample submission requirements.
- FMEA (Design and Process) — DFMEA and PFMEA documentation generated per AIAG-VDA handbook. Severity, occurrence, and detection ratings with RPN tracking.
- AEC-Q200 components — passive components, connectors, and terminals qualified to AEC-Q200. Our AVL maintains this status.
- Testing per customer spec — thermal cycling (LV 214, USCAR-2), vibration (LV 124), salt spray (IEC 60068-2-52), IP ingress (IEC 60529), and crush resistance per Tier-1 specification.
For regional standards — LV 214 / LV 215 for VW Group, GMW for GM, CES for Ford — we match the specific standard set to your program.
Why SZFRS for Automotive Harness Work
Dedicated automotive production cells. Physical separation from consumer electronics work prevents cross-contamination of materials and documentation. Automotive lines run on separate shifts with trained operators.
Tier-2 supplier experience. We’re typically a Tier-2 supplier to Tier-1s like Yazaki subsidiaries, Leoni subsidiaries, or direct second-source work for smaller Tier-1s. We don’t ship direct to OEMs — that’s the Tier-1’s role — but our work integrates into their programs.
PPAP Level 3 as standard, Level 5 on request. Full dimensional reports, capability studies, appearance approval, sample submissions. The PPAP binder for a typical program runs 150–400 pages.
Multi-brand connector stock. Molex MX150, TE AMP Superseal, Deutsch DT, FAKRA, and HSD variants in stock for fast sample turnaround. Yazaki and Sumitomo parts sourced per program.
EV battery pack experience. Orange HV wire stocked in common gauges (4, 6, 10, 12 AWG). HVIL connector installation per Molex, TE, and Amphenol specs. ESD control at pack-assembly stations.
IPC/WHMA-A-620 Class 3 workmanship standard for automotive work (higher than Class 2 default). Our capabilities page details the testing and assembly equipment.
Frequently Asked Questions
Are you IATF 16949 certified?
Yes. IATF 16949:2016 certification current, annual surveillance audit completed, certificate available on request through our contact page. Registrar name and certificate number included with the copy.
Can you support EV battery pack HVIL harness programs?
Yes. HVIL work is one of our growing categories. We stock Molex HVAC, TE HVA 280, and HSAutoLink 1-position variants. Orange jacket wire for high-voltage lines. Pack-assembly environment includes ESD control and isolated station layout. For programs above 400 V DC, additional insulation testing included in the quality package.
Do you provide PPAP documentation?
Yes. Level 3 PPAP is standard for new automotive programs; Level 5 available on request (full sample submission with extended data). PPAP package includes design records, engineering change documents, customer approvals, DFMEA and PFMEA, control plans, MSA, capability studies, appearance approval, sample product, and checking aids.
Can you handle FAKRA color-coded RF harnesses?
Yes. We stock FAKRA housings in common color codes per DIN 72594 — neutral, white, red, green, purple, blue — along with matching female receptacles. Cable typically RG-316 or specialized low-loss coax depending on frequency. For radar harnesses (77/79 GHz), we use appropriately rated cable and verify VSWR during first article.
What automotive certifications cover your wire and connectors?
AEC-Q200 for connectors and terminals; SAE J1128 / J1939 for wire where applicable; LV 112 / LV 120 for European OEM wire standards. Material certifications provided with each shipment. Traceability maintained from wire spool lot to finished harness.
Do you work with specific Tier-1 suppliers?
We ship to several Tier-1 subsidiaries and independent Tier-2 positions. Specific client names are under NDA, but we can provide references during qualification for new programs. Geographic coverage concentrates on European and Chinese OEMs, with growing North American volume since 2024.
What’s your MOQ and lead time for automotive harnesses?
MOQ 500 sets for production programs; 20 pieces for prototype and development work with NRE. Lead time 14–21 days for production release after PPAP approval; 6–10 weeks for full APQP kickoff through first production. Re-order lead time on established programs drops to 10–14 days.
Can you ship automotive harnesses to US and EU?
Yes, regularly. Germany, France, Italy, UK, US, and Mexico are our main automotive destinations. Ocean freight standard for production volume, air for pre-production and samples. Incoterms per Tier-1 agreement, typically FCA Shenzhen or DDP-Europe.
Related Wire Harness Products
- Wire Harness — full overview of our wire harness capabilities.
- Battery Pack Harness — EV and hybrid battery pack wiring with HVIL and BMS integration.
- Molex Connector Harness — MX150, MiniFit, Mega-Fit detail.
- JST Connector Harness — for interior electronics and low-current signal work.
- Waterproof / Sealed Harness — IP67 / IP69K builds for off-road and harsh environments.
Ready to Discuss Your Automotive Program?
Send us the vehicle program, target OEM, Tier-1 name if applicable, and harness category. Our automotive team responds within 24 hours with a preliminary quote, APQP timeline, and documentation scope. NDAs executed upfront for pre-production programs. Qualification visits welcome — automotive buyers visit our facility regularly.