1. A flat or dead battery

A flat or dead battery is one of the most common reasons a car won’t start.

You may notice signs such as:

• The engine struggling or failing to turn over
• A clicking noise when you try to start the car
• Dim or unresponsive dashboard lights

These issues are usually caused by things like leaving lights or electrics on, frequent short journeys that don’t allow the battery to recharge, cold weather conditions, or simply an ageing battery that is no longer holding charge.

What to do:

If this does happen, a jump start may get you going again. However, if the issue keeps coming back, it’s usually a sign that the battery needs replacing or there is a charging fault that needs checking.

Ensuring lights and electrics are switched off when you leave the vehicle can help prevent a flat battery, alongside regular battery checks and making sure the vehicle is driven enough to maintain charge.

2. Punctured or damaged tyres

A punctured or damaged tyre can often leave you stranded unexpectedly.

You may notice signs such as:

• A sudden loss of pressure in one tyre or a slow deflation
• A low tyre pressure warning light appearing on the dashboard
• The vehicle pulling to one side while driving
• A visible puncture, bulge or damage to the tyre wall

This is usually caused by a sharp object such as a nail or glass, hitting potholes or general wear and tear over time.

What to do:

If you have a puncture, it may be possible to use a spare wheel to get the car back on the road temporarily. However, damaged or unsafe tyres will usually need replacing to ensure the vehicle is roadworthy.

Regularly checking tyre pressure, monitoring tread depth and inspecting tyres for visible damage can help reduce the risk of a breakdown caused by tyre failure.

3. Engine overheating

Engine overheating is a serious issue that can quickly lead to a breakdown, and if ignored can cause significant engine damage.

You may notice signs such as:

• The temperature gauge moving into the red
• Steam coming from under the bonnet
• A warning light appearing on the dashboard
• A burning smell coming from the engine bay

These problems are usually caused by low coolant levels, coolant leaks, a broken thermostat or issues with the water pump.

What to do:

If your engine starts to overheat, pull over safely as soon as possible and turn off the engine. Do not open the coolant cap while the engine is still hot. Call for roadside assistance.

Regularly checking your coolant levels and ensuring your coolant system is serviced can help reduce the risk of overheating.

4. Alternator or charging issues

The alternator is responsible for charging your car’s battery while the engine is running, so if it fails, the battery will quickly lose charge, and the vehicle may break down.

You may notice signs such as:

• The battery warning light appearing on the dashboard
• Electrical features such as lights or windows becoming weak or flickering
• The car struggling to start or stalling repeatedly
• A burning smell

These issues are often caused by worn-out internal parts such as bearings or loose drive belts.

What to do:

If you suspect an alternator issue, it’s best to switch off the non-essential electrics and get the vehicle checked as soon as possible.

The car will most likely need professional diagnosis and repairs.

5. Fuel or ignition problems

Fuel or ignition problems can prevent your car from starting or cause it to cut out while driving.

You may notice signs such as:

• The engine turning over but failing to start
• The vehicle stalling while driving
• Difficulty accelerating or a loss of power
• A strong smell of fuel

These problems can be caused by running out of fuel, using the wrong fuel, a failing fuel pump or issues with the ignition system.

What to do:

If you run out of fuel, getting to the nearest petrol station and refilling may resolve the issue but other fuel or ignition faults will usually require professional diagnosis and repair.