Where is the starter located on a BMW 523?
3 Answers
BMW 5 Series starter motor is installed on the left side of the engine transmission near the spark plug wiring module. Function of automotive starter: The starter converts the electrical energy from the battery into mechanical energy, driving the engine flywheel to rotate and enabling engine startup. Before an engine can operate under its own power, it must be rotated by external force. The process where an engine transitions from a stationary state to self-sustained operation with external assistance is called engine starting. Principle of automotive starter: Its working principle is based on the energy conversion process involving Ampere's Law as introduced in middle school physics - a current-carrying conductor experiences force in a magnetic field. The motor consists of essential components including armature, commutator, magnetic poles, brushes, bearings, and housing.
I remember once helping a friend fix a BMW 523, and its starter location was quite hidden. Generally, it's at the bottom of the engine bay, near the connection point between the engine and transmission, specifically hidden around the flywheel. After opening the hood, you can hardly see it from above because it's blocked by components like the intake manifold and battery box. If the car only makes a clicking sound but doesn't start, it's likely a starter issue. If you really want to check it yourself, you'll need to remove the air filter or underbody cover and lift the car on a rack to access it. For non-professionals, it's easy to damage other wiring harnesses or sensors, so it's safer to leave it to a repair shop. Additionally, BMW's layout is a compact design, saving space but making repairs slightly more troublesome.
I once had a starting issue with my own BMW 523, and later discovered that the starter is located at the rear of the engine, near the firewall. After removing the interior trim panel, I saw it connected to the transmission, positioned quite deep and not directly exposed. At the time, I attempted to inspect it, but removing the battery and some mounting brackets was too cumbersome, so I didn’t proceed further. If your car has slow or no-start symptoms, first rule out whether the battery has sufficient charge, then check the starter. High-end cars like BMW are well-detailed, but DIY starter replacement carries risks, potentially damaging wiring. I recommend having a technician inspect it during regular maintenance to prevent failures.
