BMW 525 Coolant Loss: A Cracked Radiator End Tank Was Visible After Removal
A BMW 525's generic low-coolant warning became a radiator-specific diagnosis when removal exposed a crack at the plastic end-tank seam.
Tag BMW 525
2013 BMW 525 No-Start: Confirming a Valvetronic Servo Motor by Cross-Test
A 2013 BMW 525 would not start and retained Valvetronic servo-motor faults 135A08 and 135808. A known-working used motor changed the fault state, supporting replacement of the original motor, followed by sealing work, system learning, and a successful first recheck.
2014 BMW 525Li Overheating: Corroded Water-Pump Connector and Heater-Valve Leak
A 220,000 km BMW 525Li had intermittent overheating. Diagnosis found a coolant-damaged water-pump connector and a second heater-valve leak; both repairs passed a 20 km road test.