November 2025

bmw

What is N42?

What is N42? The grade N42 means a neodymium magnet has a maximum energy product of 42 MGOe. It refers to the maximum magnetic energy that the material can be stored. It can be shown by the magnet’s Demagnetization Curve, or BH Curve – the strongest point is (BH)max. The term N42 refers to a

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bmw

Is the N20B20 a good engine?

Is the N20B20 a good engine? When properly maintained, the N20 can be a reliable engine—particularly post-2015 models which received revised timing chain components. However, reliability varies based on how well the car was serviced. Recommended Preventive Measures: Replace the timing chain and guides around 80,000–100,000 miles (on early models). The timing chain guides were

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