E-ONE Cummins ISL

OEM DEF Head Unit: Precision Engineered for TEMSA/Cummins Systems

What Is It?

This DEF Head Unit (OEM TMS00157‑H) is a factory-specified component for TEMSA buses and coaches using Cummins engines. Installed on the DEF tank, it accurately measures fluid level, temperature, and dosage flow within the SCR system. It also features built‑in heating capability to prevent freeze-up in cold climates. It corresponds to Tamerx part number 5410‑13‑FA01‑4.

Why Choose OEM TMS00157‑H?

Built to TEMSA and Cummins specifications, this head unit delivers accurate DEF control and seamless electronic integration. It plugs directly into OEM wiring harnesses, supports standardized diagnostic feedback, and ensures consistent emissions function without requiring system modifications.amerX+3TamerX+3TamerX+3

Key Benefits

✅ Built for TEMSA Cummins chassis—factory-matched fit and function
✅ Accurate DEF monitoring (level, temperature, flow) ensures NOₓ control
✅ Integrated heater prevents system failure in cold environments
✅ Seamless OEM wiring and ECM compatibility
✅ Supported by Tamerx warranty coverage for dependability

Applications

This DEF Head Unit is commonly found in TEMSA buses and coaches (e.g. TS‑30, TS‑35, TS‑45, Safari HD, Avenue) using Cummins engines and SCR aftertreatment systems. Ideal for fleet and transit environments requiring reliable and compliant DEF system working conditions.

Installation Notes

Installation must be performed by a certified technician. Before fitting, inspect DEF tank connectors, sensor ports, and wiring harnesses for cleanliness and damage. After installation, run a full DEF system diagnostic via Cummins or TEMSA-compatible tools to clear fault codes and verify accurate fluid level and temperature reporting.

Final Thoughts

The OEM TMS00157‑H DEF Head Unit is engineered to maintain emissions integrity and system reliability in TEMSA Cummins SCR systems. Its OEM accuracy, corrosion-resistant design, and plug-and-play integration help fleets maintain compliance and uptime under demanding operations.