Reports have surfaced of alternators fitted to the Mini R50/R52/R53 1.4 and 1.6 petrol (2001-2009) – and all vehicles with W10 engine codes from 2003-onwards – are being returned, subject to warranty claims, due to the drive belt slipping and, consequently, causing a charging fault.
After an investigation conducted by Autoelectro’s team of experts, it has been determined that a fitting error – rather than a fault with the unit – was causing the vehicle’s engine coolant to leak onto the drive bracket, causing the drive belt to slip.
During its analysis, it was discovered that the coolant pipe, which runs parallel above the alternator and across the mounting brackets, was not being detached or moved into a safe position when removing the original alternator.
Drive belt slipping
Therefore, the pipe rubbed against the alternator mounting bolts, causing a coolant leak, which dripped onto the alternator and drive belt and resulting in the drive belt slipping.
Autoelectro said: “In all cases, the technician must ensure that the pipe is clear from the mounting bolts when replacing the alternator; if the pipe is damaged, it must be replaced.
“Failure to abide by the diagnosis and fitting instructions of both technical bulletins, may cause the replacement parts to fail and the warranty become invalid.”
The latest bulletin from Autoelectro is one of more than 500 articles available to access and download from the company’s website, which provides free advice to technicians.