What Causes a Car to Break Down and When You Need a Tow

A car breakdown can happen without much warning. One moment you are driving normally, and the next you may notice unusual noises, warning lights, loss of power or a vehicle that simply refuses to start.

Car breakdowns can have many causes, from a weak battery and flat tire to overheating, mechanical failure or problems with the fuel and electrical systems. Some problems can be resolved with basic roadside assistance, while others require a tow truck to safely transport the vehicle to a repair facility.

For Calgary drivers, weather can also play an important role. Cold winter temperatures, snow, ice and difficult road conditions can place additional stress on vehicles and make an existing problem worse.

This guide explains the most common causes of car breakdowns, what warning signs to watch for, what you can do when your vehicle stops working and when it is safer to call professional roadside assistance or a tow truck.

Quick Car Breakdown Checklist

If your vehicle suddenly develops a problem, remember these basic steps:

• Stay calm and avoid sudden braking or steering.
• Move to a safe location if possible.
• Turn on your hazard lights.
• Stop driving if continuing could damage the vehicle.
• Check the dashboard for warning lights.
• Look for obvious problems such as a flat tire or overheating.
• Do not attempt repairs in an unsafe location.
• Contact roadside assistance if the problem cannot be safely resolved.
• Request a tow if the vehicle cannot continue safely.
• Give the towing provider your exact location and vehicle details.

If you are on a busy road or highway, your safety should come before attempting to diagnose or repair the vehicle.

What Are the Most Common Causes of Car Breakdowns?

Cars can break down for many different reasons. Some failures are related to normal wear and maintenance, while others happen unexpectedly.

Common causes include:

• Dead or weak batteries
• Flat or damaged tires
• Engine overheating
• Alternator problems
• Starter motor failure
• Fuel-related problems
• Electrical faults
• Low or leaking fluids
• Brake problems
• Transmission issues
• Engine failure
• Extreme weather conditions
• Running out of fuel

Understanding these common problems can help you recognise warning signs before a minor issue becomes a major breakdown.

1. Dead or Weak Battery

A dead battery is one of the most common reasons a vehicle will not start.

The battery supplies electrical power needed to start the engine and operate many of the vehicle’s electrical systems. Cold weather can make battery problems more noticeable because low temperatures can reduce battery performance.

Signs of a weak battery can include:

• Slow engine cranking
• Clicking when you turn the key
• Dim headlights
• Electrical accessories working poorly
• Difficulty starting the vehicle
• A battery warning light

Leaving lights or other electrical equipment on can also drain a battery.

If the vehicle simply needs a boost and the battery is otherwise healthy, roadside assistance may be able to get you moving again. However, if the battery is damaged or the vehicle still will not start after a boost, a tow may be necessary.

2. Flat or Damaged Tire

Tire problems can cause a breakdown almost anywhere.

A puncture, damaged sidewall, low tire pressure or other tire failure can make the vehicle unsafe to drive.

If you experience a flat tire:

1. Slow down gradually.
2. Avoid sudden steering or braking.
3. Move away from traffic if possible.
4. Turn on your hazard lights.
5. Check whether you have a spare tire and the required tools.
6. Only attempt to change the tire if the location is safe.
7. Contact roadside assistance if you cannot safely change it.

Driving on a completely flat tire can cause additional damage to the tire and wheel.

If a spare tire cannot be installed or the vehicle is in an unsafe location, professional roadside assistance or towing may be the safer option.

3. Engine Overheating

An overheating engine can quickly turn into a serious mechanical problem.

The cooling system is responsible for controlling engine temperature. Problems with coolant levels, leaks, the radiator, thermostat, water pump or cooling fan can cause the engine to overheat.

Warning signs can include:

• Temperature gauge moving into the hot zone
• Steam coming from under the hood
• An overheating warning light
• Unusual smells
• Loss of engine performance

If your engine overheats, do not continue driving simply to reach your destination.

Pull over somewhere safe and turn off the engine. Avoid opening a hot radiator or coolant reservoir because hot coolant and steam can cause serious burns.

Allow the vehicle to cool and contact professional assistance if necessary.

An overheated vehicle often requires inspection before it is safe to continue driving, and towing may be appropriate if there is a suspected cooling-system or engine problem.

4. Alternator Failure

The alternator helps keep the battery charged while the engine is running and supplies electrical power to the vehicle’s systems.

If the alternator stops working, the vehicle may eventually lose electrical power even if the battery was initially fully charged.

Possible signs include:

• Battery warning light
• Dim or flickering lights
• Electrical accessories becoming weaker
• Difficulty starting the vehicle
• Engine stalling

An alternator problem generally cannot be solved with a simple jump-start for long.

A boost may temporarily start the vehicle, but if the alternator is not charging the battery, the vehicle could stop again. In this situation, arranging a tow to a repair facility may be safer than attempting to drive there.

5. Starter Motor Problems

The starter motor is responsible for turning the engine over when you start the vehicle.

If the starter fails, you may hear a clicking sound or nothing may happen when you turn the key or press the start button.

A starter problem can sometimes look similar to a dead battery.

If the battery is known to be charged but the engine still will not crank, the starter or another starting-system component may require inspection.

Roadside assistance can help determine whether the vehicle needs a boost or whether towing is required.

6. Fuel System Problems

Fuel-related problems can also leave drivers stranded.

The most obvious example is running out of fuel, but fuel-system problems can also involve the fuel pump, fuel filter or other components.

If your vehicle runs out of fuel:

1. Move somewhere safe if possible.
2. Turn on the hazard lights.
3. Avoid walking along a busy road to find fuel.
4. Contact roadside assistance for fuel delivery.
5. If the vehicle still does not start after fuel is added, arrange further assistance.

If the fuel system itself has failed, adding fuel will not solve the problem and the vehicle may need to be towed for diagnosis and repair.

7. Electrical Problems

Modern vehicles depend on complex electrical systems.

A problem with wiring, fuses, sensors, electrical modules or other components can cause anything from a minor malfunction to a complete breakdown.

Electrical problems can be difficult to diagnose at the roadside.

If the vehicle develops unusual electrical behaviour, repeated warning lights or suddenly loses electrical power, avoid attempting complicated repairs unless you have the appropriate knowledge and equipment.

Professional roadside assistance can help determine whether the vehicle can be safely restarted or should be towed.

8. Transmission Problems

Transmission problems can prevent a vehicle from moving properly even when the engine is running.

Possible warning signs include:

• Difficulty changing gears
• Delayed engagement
• Grinding or unusual noises
• Slipping gears
• Burning smells
• Fluid leaks
• The vehicle refusing to move

If the transmission appears to have failed, continuing to drive can potentially cause additional damage.

If the vehicle cannot move normally or is behaving unpredictably, a tow truck can transport it to a qualified repair facility without requiring you to drive it.

9. Brake Problems

Brake problems should always be treated seriously.

Warning signs can include:

• Soft or spongy brake pedal
• Grinding noises
• Unusual vibrations
• Brake warning lights
• Reduced braking performance
• Pulling to one side while braking

If you notice a serious change in braking performance, do not continue driving simply because the vehicle still moves.

Find a safe place to stop and arrange professional assistance. If the vehicle cannot be safely driven to a repair shop, towing is the appropriate option.

10. Low or Leaking Fluids

Vehicle fluids play an important role in keeping major components operating correctly.

Depending on the vehicle, important fluids can include engine oil, coolant, brake fluid, transmission fluid and windshield washer fluid.

Leaks underneath the vehicle can sometimes provide an early warning of a problem.

If you notice a significant fluid leak, unusual smells or warning lights, avoid assuming that the vehicle is safe to drive.

Driving with low engine oil or coolant, for example, can contribute to serious mechanical damage.

If you are unsure what is leaking or why a warning light has appeared, professional inspection may be necessary.

What Warning Signs Should You Never Ignore?

Many breakdowns provide warning signs before the vehicle stops completely.

Pay attention to:

• New or unusual noises
• Warning lights
• Strange smells
• Smoke or steam
• Vibrations
• Loss of power
• Difficulty steering
• Changes in braking performance
• Slow starting
• Fluid leaking underneath the vehicle
• Unusual engine temperature
• Gear-changing problems

A warning light does not always mean the vehicle will immediately break down, but ignoring repeated warnings can allow a small problem to become more serious.

If the vehicle is showing a serious warning or behaving abnormally, stopping safely and arranging an inspection may prevent a roadside breakdown.

What Should You Do When Your Car Breaks Down?

If your vehicle stops working while you are driving, safety should be your first priority.

Step 1: Move to a Safe Location

If the vehicle can still be controlled safely, move it away from moving traffic.

A parking lot, rest area, shoulder or other safe location may be preferable to stopping in an active traffic lane.

Do not take unnecessary risks trying to move a vehicle that has serious steering, braking or mechanical problems.

Step 2: Turn on Your Hazard Lights

Turn on your hazard lights to make the vehicle more visible.

This is particularly important at night, during snow, heavy rain, fog or other conditions that reduce visibility.

Step 3: Check the Dashboard

Look for warning lights or messages that may provide information about the problem.

Common warning indicators include battery, engine temperature, oil pressure and brake warnings.

Do not rely on dashboard information alone if the vehicle is behaving dangerously or unusually.

Step 4: Stop Driving if Necessary

If continuing to drive could damage the vehicle or create a safety risk, stop.

Examples include:

• Severe overheating
• Loss of braking
• Major steering problems
• Significant fluid leaks
• Smoke or steam
• Serious engine noises
• Transmission failure

A vehicle that can physically move is not necessarily safe to drive.

Step 5: Contact Professional Help

If you cannot safely resolve the problem, contact roadside assistance or a towing provider.

Give the provider:

• Your exact location
• Vehicle make and model
• Description of the problem
• Whether the vehicle is blocking traffic
• Whether anyone is injured
• Whether the vehicle is stuck
• Your destination if towing is required

When Do You Need Roadside Assistance?

Roadside assistance can be useful when the problem may be resolved without transporting the vehicle.

Common roadside assistance situations include:

• Dead battery
• Flat tire
• Running out of fuel
• Vehicle lockout
• Minor roadside problems
• Vehicle stuck in snow
• Basic recovery assistance

For example, a dead battery may only require a jump-start, while a flat tire may only require spare tire installation.

However, roadside assistance is not always enough.

If the vehicle has suffered serious mechanical damage or cannot safely continue, a tow may be necessary.

When Should You Call a Tow Truck?

A tow truck is generally appropriate when the vehicle cannot safely or reliably continue driving.

Consider arranging a tow when:

• The engine has failed
• The vehicle is overheating severely
• The brakes are not working properly
• The transmission has failed
• The vehicle has suffered major mechanical damage
• The vehicle was involved in a collision
• The steering system has a serious problem
• The vehicle has significant fluid leaks
• The vehicle cannot move
• Driving the vehicle could cause additional damage
• You are stranded in an unsafe location

When in doubt, prioritise safety rather than trying to drive a damaged vehicle to a repair shop.

ARM Towing provides 24/7 towing and roadside assistance in Calgary and nearby areas, including battery boosts, flat tire assistance, fuel delivery, lockout service and vehicle recovery.

Can You Drive Your Car After a Breakdown?

It depends on the cause of the breakdown and the condition of the vehicle.

Some problems may be resolved safely at the roadside. For example, a vehicle with a discharged battery may restart after a proper boost.

Other problems should not be ignored.

Do not continue driving if:

• The temperature gauge indicates severe overheating.
• The brakes are not functioning properly.
• The vehicle has major steering problems.
• There is significant smoke or steam.
• The engine is making severe mechanical noises.
• The vehicle is leaking an important fluid.
• The vehicle cannot accelerate or move normally.
• A collision has caused structural or mechanical damage.

If you are uncertain whether the vehicle is safe to drive, professional assistance is safer than guessing.

Calgary Winter Conditions and Vehicle Breakdowns

Cold weather can make vehicle problems more difficult for Calgary drivers.

Winter can place additional demands on:

• Batteries
• Tires
• Cooling systems
• Heating systems
• Electrical components
• Windshield washer systems

Snow and ice can also make it more difficult to pull over safely or reach assistance.

Before winter driving, check your battery, tires, fluids, lights and emergency supplies.

Keep warm clothing, blankets, a flashlight, shovel, traction material, food, water and a charged phone available in the vehicle.

If severe weather creates dangerous conditions, avoid unnecessary travel and check current road conditions before starting a longer journey.

How Can You Prevent a Car Breakdown?

Not every breakdown can be prevented, but regular maintenance can reduce the risk of unexpected problems.

Check Your Tires

Inspect tire pressure and tread regularly.

Do not forget to check the spare tire if your vehicle has one.

Check the Battery

If your vehicle has difficulty starting, have the battery and charging system inspected.

This is particularly important before Calgary’s colder winter months.

Follow the Maintenance Schedule

Follow the maintenance recommendations provided by your vehicle manufacturer.

Regular servicing can help identify worn or failing components before they cause a breakdown.

Check Fluids

Monitor important fluids and look for signs of leaks.

If you notice a new leak, have the vehicle inspected rather than simply adding more fluid and continuing to drive.

Pay Attention to Warning Lights

Do not ignore persistent warning lights.

A warning light may indicate a problem that should be addressed before it develops into a roadside breakdown.

Listen for Unusual Sounds

New knocking, grinding, squealing or clicking sounds should not automatically be dismissed.

Unusual sounds can be an early indication that a component needs inspection.

What Information Should You Give a Tow Truck Driver?

When requesting a tow, provide as much useful information as possible.

Be prepared to give:

• Your exact location
• Vehicle make and model
• Vehicle colour
• Description of the breakdown
• Whether the vehicle can move
• Whether the vehicle is blocking traffic
• Whether anyone is injured
• Whether the vehicle is stuck
• Your preferred repair facility or destination

If you are on a highway, provide the highway number, direction of travel, nearest exit and nearby signs or landmarks whenever possible.

Accurate information can help the towing provider understand what type of assistance may be required.

Roadside Breakdown Safety Comes First

A vehicle breakdown can be stressful, but attempting an unsafe repair can make the situation worse.

If you are stopped near moving traffic, prioritise visibility and distance from traffic.

Do not stand unnecessarily close to the roadway, and avoid attempting complicated repairs without the necessary knowledge or equipment.

During cold Calgary winters, exposure to low temperatures can also become a serious concern. Keep warm clothing and blankets in the vehicle and make sure your phone has enough battery to contact help.

If there is an immediate threat to life or someone is seriously injured, contact 911.

Final Breakdown Checklist for Calgary Drivers

Car breakdowns can happen for many reasons, including battery failure, tire problems, overheating, electrical faults, fuel problems, transmission issues and mechanical failure.

The most important thing is knowing when a vehicle can be safely dealt with at the roadside and when it needs to be towed.

Remember the essentials:

Watch for warning signs. Stop safely. Do not drive a dangerous vehicle. Call professional help when necessary.

Regular maintenance and basic preparation can reduce the risk of being stranded, but no vehicle is completely immune to unexpected problems.

If your vehicle breaks down in Calgary and you need battery assistance, flat tire service, fuel delivery, lockout assistance, recovery or towing, ARM Towing provides 24/7 roadside assistance and towing in Calgary and nearby areas.

Frequently Asked Questions

What is the most common cause of a car breakdown?

Common causes include dead batteries, flat tires, fuel-related problems, overheating, electrical faults and mechanical failures. Regular maintenance can help identify some problems before they result in a breakdown.

What should I do if my car suddenly breaks down?

Move to a safe location if possible, turn on your hazard lights, check the vehicle for obvious warning signs and contact roadside assistance if you cannot safely resolve the problem.

When should I call a tow truck?

Call a tow truck when your vehicle cannot safely continue, has suffered serious mechanical damage, has major brake or steering problems, is severely overheating or requires transportation to a repair facility.

Can a dead battery cause a car breakdown?

Yes. A weak or dead battery can prevent the engine from starting and may leave you stranded. A jump-start may solve the problem if the battery and charging system are otherwise functioning properly.

Can I drive an overheating car to a repair shop?

It is generally safer not to continue driving a severely overheating vehicle. Continuing to drive can cause additional engine damage. Stop somewhere safe, turn off the engine and arrange professional assistance.

What are the warning signs of an upcoming breakdown?

Warning signs can include unusual noises, warning lights, fluid leaks, overheating, difficulty starting, loss of power, vibrations, unusual smells and changes in braking or steering performance.

Is a flat tire considered a breakdown?

A flat tire is a common roadside problem that can leave a vehicle unable to continue safely. If you have the correct equipment and a safe location, the spare tire may be installed. Otherwise, roadside assistance can help.

Should I drive my car if the check engine light is on?

It depends on the warning and how the vehicle is behaving. A flashing or accompanied-by-serious-symptoms warning should be treated more urgently than a normal illuminated light. If the vehicle is running poorly, overheating, losing power or making unusual noises, stop safely and seek professional assistance.

Does ARM Towing provide towing and roadside assistance in Calgary?

Yes. ARM Towing lists 24/7 towing and emergency roadside assistance in Calgary and nearby areas, including battery boost and jump-start service, flat tire assistance, fuel delivery, vehicle lockout assistance and vehicle recovery.