TEMSA Cummins

Factory Precision DEF Head Unit for TEMSA Cummins Vehicles

What Is It?

The DEF head unit OEM TMS00157‑H is a key emissions component used in TEMSA buses and coaches equipped with Cummins engines. Designed to manage DEF level, temperature, suction flow, and heating, it ensures reliable operation of the vehicle's SCR aftertreatment system. 

Why Choose OEM TMS00157‑H?

Built to factory specifications, this direct-fit unit replaces TEMSA’s original DEF head assembly. It integrates cleanly with chassis wiring, tank fittings, and ECM without modification. It comes with Tamerx part number 5410-13-FA01-4 and includes a one‑year or one‑million‑mile warranty for dependable use. 

Key Benefits

✅ Designed specifically for TEMSA Cummins chassis
✅ Accurately monitors DEF level, temperature, and flow
✅ Includes DEF heating for cold weather operation
✅ Plug‑and‑play compatibility with OEM wiring harness
✅ Backed by Tamerx warranty for long‑term reliability 

Applications

This DEF head unit is primarily used in TEMSA buses and motor coaches powered by Cummins engines, especially TEMSA’s models like the TS‑30, TS‑35, TS‑45, Avenue, and Safari HD. It ensures SCR system effectiveness in mass transit and commercial passenger transport vehicles. 

Installation Notes

Installation must be handled by a qualified technician. Inspect DEF tank port, electrical connector, and fluid lines before mounting the new unit. After installation, run a system diagnostic via Cummins or TEMSA-approved tools to clear any fault codes and confirm sensor reading accuracy and proper dosing operation.

Final Thoughts

With its OEM‑validated build and robust sensor integration, the DEF head unit OEM TMS00157‑H offers dependable SCR system control for TEMSA vehicles. It’s engineered to maintain emissions compliance and maximize uptime with a factory‑matched fit and Tamerx-backed reliability.