The K&N drop‑in air filter for BMW 525i (1989–1996) replaces your factory element with washable, reusable layered oiled‑cotton media to improve airflow and help increase horsepower. It installs directly into the original air box and is intended to provide long service life while reducing disposable filter waste. Backed by K&N's No‑Hassle Lifetime limited warranty for lasting engine protection.
K&N Replacement Air Filter BMW 525I L6-2.5L 24V (M50)