정기점검미국 · Stack Exchange★ 신뢰도 4.1 (높음)

BMW 5시리즈 수리 사례

G30 (2017-현재) · 520d

2026. 8. 29. 작업

난이도 & 준비물

증상

As illustrated by this list of car engine names by manufacturer , car manufacturers like to give the petrol and diesel variants of their engines often confusing names. The least confusing of these naming schemes is to refer to diesel engines with d , as in BMW 525d , and petrol engines with i , as in BMW 525i. The above article shows that BMW, Citroen and Mazda all refer to the petrol variants of their engines using i . D for diesel is self-explanatory, but what exactly does the i stand for when referring to petrol?

처리 내용

The i is a leftover from the 1970s, when a few companies (BMW and Mercedes, notably) started replacing the carburetor on their petrol engines with fuel injection. The marketing department saw an opportunity (for bragging about the superior fuel management on those cars) and added the i (or E, in Mercedes' case, for Einspritzung, German for injection) to the car's type number. This worked for a few years, then the catalytic converter became mandatory and everyone switched to fuel injection. 45 years later, BMW still uses the i (as in '320i'). To make things more confusing, they are labelling their electric cars as i3 and i8. Mercedes dug themselves a hole with their old naming scheme (which became increasingly convoluted with the introduction of the 190), so they switched to using letters (C, E, S etc.) indicating the model range. The 300 E became the E 300. So their midrange product is now called the E-class, and you can have an E-class diesel. Similar things happened with other techno