With various aspects of servicing, maintenance, including driver assisted features and vehicle monitoring. For our 1996 Rover 200 and the 04 ZR 120+
About features, and driver notifications on our MG-Rover Information Pages
Having installed a coolant low level warning sensor into the old 200 several years ago, then transferred into the MG during 2010, its been trouble free over many years of service with a good safety feature, that will activate an instant audible warning alert soon as the coolant tank, should for any reason, start to drop to a level that is much more than below the coolants specified minimum safety mark.
Cooling system did not need being drained, just syphoned out, and then replaced with a new tank. RPCF000160. The optional warning modules, of either a piezo buzzer, or dashboard warning light were then then fitted, along with the all important reed sensor.
Attempting to drill a hole in the original tank to accept the sensor, as already asked, is not really a good idea on a pressurised vessel, parts required for this project, were a replacement coolant tank.Part number RPCF000160, and the reed sensor part number RPCJ000040. For completing this installation, each of the warning modules, are an easy fit so we chose to fit both of them.
In any event, a reasonable amount of coolant would still be in circulation, allowing time to park up and investigate. not relied upon as a fit and forget. Visual checks on coolant level, and hoses, are still carried out. Along with other routine vehicle checks and servicing This feature incorporates a manual activation test mode, by removing the coolant cap on a 'cold engine' and holding down the internal magnet.
Information is referenced only to our 1996 Rover 200 and 2004 ZR 120+