In-car smells can indicate minor or major mechanical issues, depending on the nature of the smell, its location, and whether any fluid leaks or other symptoms are present.

Fluid leaks are the most common source of unusual smells in a vehicle. Gasoline, oil, coolant, and other fluids can leak from ruptured hoses, gaskets, and seals.

Many components can cause fluids to leak if they break or rupture, but some components themselves can cause unusual odors if they stop working properly.

Smells coming out from under the hood or under the vehicle often take on a specific, recurring odor. Here are some odors you must take note of.

Carbon monoxide is a major component of vehicle exhaust, and is often referred to as the “silent killer”. You must get your car inspected immediately.

If exhaust fumes are present in the cabin, so is carbon monoxide. Carbon monoxide can cause loss of consciousness, and prolonged exposure can cause death.

A strong smell of gasoline can indicate a leaking fuel supply component or an evaporative emissions component.

In modern cars, fuel odors should not be detectable at any time beyond refueling. You must have the vehicle inspected by a professional immediately.

When a sweet smell is detectable, the likely source is the coolant. The coolant travels throughout the engine, radiator, hoses, and heater core, which is located under the dashboard.

A coolant smell will usually be followed by an overheating condition, so a thorough visual inspection should be performed immediately.

The most likely cause of a strong scent like rotten eggs is a catalytic converter being overwhelmed or reaching failure.

Sometimes this can be a result of an overcharged battery or fuel system issue. To avoid costly repairs, have the car inspected as soon as possible.

Overheating the brakes or tires can cause the car interior to smell of burnt rubber and a slipping or malfunctioning clutch can cause the interior to smell like burning wood.

In both the cases, letting the components cool off for a few minutes may solve the problem, but if the problem persists, then the components are in the need of servicing.

As engine oil leaks from a failed gasket or seal, it typically lands on hot components and gives off a distinct smell.

Small amounts of oil may neither leave traces on the floor nor be easily seen without a thorough inspection. It is vital to address the smell of oil even if no oil is actually visible.

Usually, a musty odor indicates the buildup on the vehicle's evaporator or a cabin air filter that is due for replacement.

An inspection of the duct system is required under these circumstances and if there is a presence of a cabin filter, then it needs to be replaced.

You must not be complacent when you experience these pungent smell coming from your car, and should immediately take it for inspection.

If you carry out a preventive maintenance, then it will help you in avoiding most of the common issues associated with cars.