The BMW N52 engine was introduced in 2004 and quickly gained a reputation as one of the most reliable and popular BMW engines to ever come out of Bavaria. That’s saying something, as straight-six engines had already been BMW’s bread and butter for almost 90 years by the mid-2000s. In the same year, BMW released another inline-six engine that was nearly identical to the N52 and called the N51. The N51 and N52 aren’t the only engines in BMW’s lineup that
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