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BS6: What are the drawbacks with BS6 implementation in India?

The implementation date of new BS6 emission norms is closing. All the manufactures were facing many problems as the period from BS4-BS6 is meer 3 years. Well, the Indian government had something in mind that they took the decision to launch BS6. Though it was a very good decision, it wasn’t a full proof plan.

Apart from the environmental reason for implementing BS6, it faces some drawbacks.

Auto Expo 2020 the theme that the organisers are going for is Mobility. Along with it, they are also focusing on the aspect of cleaner fuel and Electric vehicles
BS6 | Drawbacks

Changes in the norms | BS4-BS6

On 1st of April, the government implemented the upgraded BS4 emission norms. These emission norms were a big step forward from the previous BS3 emission norms.

  • Though BS4 a huge step, it was a new emission norm after nearly a decade. The government thought of compensating the time hence decided to launch BS6 after BS4.
  • That too after 3 years and skipping a ladder (BS5) in between.
  • This gave the automobile manufacturers very little time to do their research and development for new BS6 compliant engines.
  • Skipping BS5 gave the manufacturers a very was data to research on increasing the problems further.

Also Read: BS6 (Bharat Stage 6) | Explained

Ineffective present pollution regulations

Emission norms are in the country since 2000. Well, it’s not just about making and implementing emission norms.

  • The emission norms in the country need to be checked whether the car is BS3, BS4 or BS6 compliant. Which in our county is highly unlikely
  • People have to visit a PUC center after every 3-6 months. In many cases either the equipment is not checked properly or it is not properly calibrated. In any of the cases, it is defeating the whole purpose of the Pollution Check Certificate.
  • On the other hand, some three-wheeled karts (Gugad) still run on the old 2-stroke petrol engines. And those engines were banned back in the early 2000s.

Also Read: BS6 vs BS4 vs BS3 vs BS2 vs India 2000: Emission Norms Compared

Comparison between Bharat Stage and Euro emission norms

Both Bharat Stage and Euro emission norms share almost the same emission readings if not exactly the same.

  • Euro emission norms are designed according to many pre-requirements. These demands include temperature, humidity, the speed at which the test is done, topography, etc.
  • Both the norms sharing the values at their respective parts like BS2 share the rearings with Euro Stage 2. The test conditions are totally different.
  • For instance, the test in Euro 3 is done in sub-zero conditions in Europe. On the other hand hare in India the average temperature range between 24 °C to 28 °C.
  • The speeds at which they are tested is also different. Here in India the test is done at 90km/h but in Europe its around 120km/h.

Also Read: BS6 Era: Boon to economy or Bane to Performance!?!

Implementing the new BS6 emission norms will definitely have some differences. But to take the total juice out of BS6, the government needs to consider checking the effectiveness.

Utkarsh Bhardwaj
Utkarsh Bhardwaj
Technical Content Strategist at GoMechanic | Big Time Petrolhead with the passion for building cars and driving those beauties.


  1. You have mentioned that people have to visit puc every 3 4 months. I get my car pic for 1 year in nasik. Bs6 cars will not require puc I think.

    • You do require a PUC for a BS6 vehicle. And yes, you are right, there are 3/6 months and 1 year options to choose from for vehicle PUC.


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