Munich. With BMW M Ignite technology, a new engine technology patented by BMW in 2024 is set to enter series production. This new kind of pre-chamber ignition system for petrol engines will debut in the six-cylinder in-line units for the BMW M2, BMW M3 and BMW M4 from mid-2026. One of its standout benefits is a significant reduction in fuel consumption under high loads – during track use, in particular. This new engine innovation has its roots in motor sport, making it another example of the transfer of technology from the race track to the road. And it also plays a major role in meeting the stringent requirements of the Euro 7 standard.
The centrepiece of BMW M Ignite technology is the pre-chamber positioned within the cylinder head. It is connected with the cylinder’s main combustion chamber by overflow openings. The pre-chamber has its own spark plug and ignition coil, meaning the engine has two ignition systems.
At low and medium revs, the conventional spark plug in the main combustion chamber fires before the spark plug in the pre-chamber. But when the engine is operating under higher revs and loads, the pre-chamber ignition takes over the lead role, with part of the fuel-air mixture channelled through the openings into the pre-chamber also ignited there. The flames generated as a result exit the pre-chamber at around the speed of sound.
These ignition jets then ignite the mixture in the main combustion chamber above the piston at multiple points at the same time. The result is a significantly higher combustion speed. Meanwhile, the possible cause of uncontrolled combustion – i.e. “knocking” – is also countered effectively. An additional effect of this technology is a drop in the temperature of the exhaust gas.
Other new technical features alongside the pre-chamber ignition include a higher compression ratio and turbochargers with variable turbine geometry.
BMW M Ignite technology boosts the efficiency of the six-cylinder in-line engines dramatically, especially when the engine is being pushed to its limits. Under high loads, fuel consumption drops substantially. This is particularly beneficial for BMW M customers who drive their cars on race circuits – e.g. during track days: the fuel consumption reduction enabled by BMW M Ignite technology means they can keep lapping for longer on the same amount of fuel.
As well as these efficiency gains, BMW M Ignite technology also helps to meet the new European Euro 7 standard, which will come into force in November 2026. In this way, BMW M is ensuring the high-performance cars fitted with this technology will continue to meet European registration requirements in the future. The new engines therefore represent another instance of technology from racing cars making its way into series-production models.
All variants of the BMW M3 and BMW M4 will come with BMW M Ignite technology from July 2026. Production of the BMW M2 featuring this technology will get underway in August 2026. The displacement and power outputs of all the models with BMW M Ignite technology will be unchanged from those of the corresponding outgoing engines.
BMW Group PressClub Global
