The BMW N42 is a DOHC four-cylinder petrol engine which replaced the BMW M43 and was produced from 2001-2004. [1][2] The N42 serves as the basis for the smaller N40 engine …

Nov 21, 2025 · A complete guide to the BMW N42 engine: reliability, common problems, efficiency, tuning potential, and what owners should expect from the E46’s four-cylinder.

Jun 6, 2025 · Discover the reliability, common problems, and oil specifications for the BMW N42 engine to keep your vehicle running smoothly.

Jan 10, 2025 · Discover the Engine BMW N42, its specifications, reliability, and common problems faced by owners in this comprehensive guide.

Mar 25, 2025 · Discover common problems with the BMW N42 engine and learn effective solutions to maintain performance and reliability.

Feb 10, 2025 · In this article, we will delve into the specific problems that plague the BMW N42 engine, providing a clear picture of what to expect and how to address these issues effectively.

Introduced in 2001, the BMW N42 is a four-cylinder gasoline engine. It was implemented in the BMW 3 Series E46 for the 316i and 318i models and was later succeeded by the N43, N45, …

Dec 18, 2024 · Chip Tuning Any versions of the N42 are difficult to tuning. In market conditions it is problematic to find parts to increase power. The only possible option is to change the air …

Dec 1, 2024 · Characteristics of standard BMW N42 camshafts: phase 250/258, lift to 9.7/9.7. The N42B20 intake manifold is equipped with the DISA length modification system, which …

Jun 14, 2025 · The N42 engine features a DOHC (Dual Overhead Camshaft) design with variable valve timing, a technology that enhances both performance and fuel efficiency. With a …