Take a leaf out of our book: make autumn checks on your car says IAM

LONDON – October 14, 2009: Leaves on the line, slippery streets and endless hours sweeping the driveway. They may look pretty but autumn leaves can interfere with getting around. They can also have a devastating effect on the electronics of many modern cars, and the IAM (Institute of Advanced Motorists) is advising simple autumn checks to prevent breakdowns.

Plenum chambers
At this time of year it’s quite common for leaves to accumulate in ‘plenum chambers’ – the tray-like area under the bonnet, just below the windscreen.

Most modern cars have one or two plenum chambers at the back of the engine bay, where the heating system draws in air.

Leaves can block up the drains and cause them to fill with water when it rains which then leaks into areas that should be protected from the elements, such as the computers which control the engine, braking systems and other expensive electronic equipment. Trapped water can also make the windows constantly mist up, impairing visibility and reducing safety.

So the next time the bonnet is up, perhaps when checking the oil or topping up the windscreen washer, have a look at these chambers and clear out the leaves and any accumulated grime.

Batteries
Autumn can also take its toll on car batteries as the first frost settles, but some basic maintenance can help to prolong battery life.

The top of a battery must be clean and dry, the terminals must be tight and free from corrosion and the battery itself must be mounted securely in its tray. Modern batteries need be kept fully charged by the car’s alternator. If a battery is more than three years old, it is worth having it checked now to save many a frustrating start to an autumn morning.

Also make sure you check your antifreeze and stock up on de-icer for the frosty mornings ahead.

It pays to bear your own driving behaviour in mind as the seasons change, and to adapt your driving to the conditions. Always drive within your own – and your car’s – limits.