The Automotive Research Association of India (ARAI) has completed a deterioration factor (DF) evaluation project for Stellantis India. The study focused on a diesel variant of the Jeep Commander passenger vehicle intended for export to Japan and was conducted at ARAI’s Homologation Technology Centre – Emission Certification Lab in Pune.
The evaluation followed the United Nations-defined Worldwide Harmonized Light Vehicles Test Procedure (WLTP), specifically under UN Regulation 154-02, which pertains to Level 1B compliance applicable in the Japanese market. Testing involved a total mileage accumulation of 80,000 km using a robotic driving system, with emission measurements recorded at 3,000–5,000 km, 20,000 km, 40,000 km, 60,000 km, and 80,000 km intervals.
Using the three-phase WLTP drive cycle (Low, Medium, High) and the Standard Road Cycle (SRC), ARAI derived both multiplicative and additive deterioration factors. These factors are intended to ensure that vehicle emissions remain within regulatory limits throughout their operational life.
The project is aligned with India’s upcoming AIS 175 WLTP-based emissions regulations.
Based in Pune, ARAI is an autonomous organization that provides testing, certification, and research services to the automotive industry. Its activities include vehicle evaluation, emission testing, and regulatory compliance assessments.
