What To Do When You Notice Your Car Is Leaking Fluid

It’s never a good feeling spotting a puddle forming beneath your car. Whether it’s a small drip or a spreading stain, a car leaking fluid can signal a minor issue or a serious mechanical fault. Ignoring it isn’t just risky for your vehicle; it could compromise your safety on the road and result in costly repairs down the line. 

This guide will help you understand the possible causes, what immediate actions to take, and how to prevent further damage.  

At Bromley Vehicle Test Centre, we’ve seen every type of fluid leak imaginable and know how confusing it can be to figure out what it means. That’s why, alongside our comprehensive MOT services, we provide expert servicing & repairs to address any underlying problems efficiently. If you notice your vehicle leaking fluid, don’t wait; contact our expert team for advice or an inspection. Call us on 020 8460 6666 or email info@bvtc.co.uk today.  

What Causes Car Fluid Leaks 

Noticing a puddle under your car can be alarming, but understanding the reasons behind fluid leaks can help you act quickly and prevent bigger problems.  

Let’s take a closer look at the most common car fluids and why they leak: 

1. Engine Oil

   Engine oil is essential for lubricating your engine’s moving parts. Leaks often occur due to worn gaskets, deteriorated seals, or a loose oil filter. Over time, heat and pressure can degrade these components, leading to oil seepage. If left unchecked, low engine oil can lead to engine overheating and severe damage. 

2. Coolant

   Coolantkeeps your engine from overheating. Leaks usually happen from cracked radiators, damaged hoses, or a faulty overflow tank. Signs include coloured puddles (green, pink, or orange) and a sweet smell. A leaking cooling system can quickly overheat the engine, so prompt inspection is crucial. 

3. Brake Fluid

   Brake fluid is vital for safe stopping. Leaking brake lines, a worn master cylinder, or damagedcallipers can cause fluid loss. This is a serious issue, as low brake fluid directly affects braking performance and can put you and others at risk. 

4. Transmission Fluid

   Automatic and manual gearboxes rely on transmission fluid for smooth operation.Worn seals or a damaged transmission pan can cause leaks. Symptoms include red or brown fluid under the car or difficulty shifting gears. Early detection prevents costly repairs and extends transmission life. 

5. Power Steering Fluid

   Your steering system needs fluid tooperate smoothly. Leaks often stem from a failing pump, cracked hoses, or loose connections. Low power steering fluid makes steering heavy and less responsive, especially at low speeds, increasing the risk of accidents. 

6. Windscreen Washer Fluid

   Although less critical thanleaks in other systems, a washer system leak can be frustrating. Cracked reservoirs, loose hoses, or faulty pumps are common causes. Ensuring this system works properly maintains visibility, especially in wet or dusty conditions. 

Detecting a car leaking fluid early is vital for preventing breakdowns and expensive repairs. Even minor drips can signal underlying issues that should not be ignored, so timely vehicle diagnostics and inspections are always recommended to keep your car in top condition.  

Immediate Actions To Take When You Notice Your Car Is Leaking Fluid 

A car leaking fluid can be alarming, but knowing the right steps to take immediately can save you costly repairs and prevent safety hazards. Here’s a detailed guide to handling leaks effectively: 

1. IdentifyThe Type Of Fluid

   Correctly identifying the leaking fluid is crucial to prioritise urgency and avoid further damage: 

• Engine Oil: Typically,  brown or black, slick to the touch. A low engine oil level can cause severe engine wear or even seizure. 

• Coolant: Often green, pink, or orange with a sweet smell. Leaks can lead to engine overheating and long-term damage if ignored. 

• Brake Fluid: Clear to yellow, slippery, slightly oily. Brake fluid leaks are urgent since they can compromise stopping power. 

• Transmission Fluid: Red or brown, slightly sweet-smelling. Low transmission fluid may cause gear slippage or complete gearbox failure. 

• Power Steering Fluid: Light brown, amber, or red, slick texture. A leak here may make steering heavy and unresponsive. 

• Windscreen Washer Fluid: Blue or green, watery. While not urgent for the car function, it affects visibility and should be topped up. 

Tip: Place a cardboard sheet under the car overnight to trace the leak’s origin. This helps determine the source and severity. 

2. Check Fluid Levels Immediately

   Once identified, check the relevant fluid levels. Running your car with low levels can quickly escalate the problem: 

• Engine Oil: Use the dipstick to check; top up with the recommended oil if low. Avoid overfilling, which can also cause damage. 

• Coolant: Add only when the engine is cool. Never remove the radiator cap on a hot engine. Use the specified type for your car. 

• Brake Fluid: Even minor drops require attention. Do not attempt to drive if levels are critically low; brakes could fail. 

• Transmission & Power Steering Fluid: Check the dipstick or reservoir; low levels indicate either a leak or worn seals. 

Tip: Always keep spare essential fluids in your boot for safe minor top-ups. 

3. Inspect Surrounding AreasForVisible Damage

   A leak usually points to an underlying mechanical issue. Take a careful look for: 

• Cracked or split hoses 

• Worn gaskets or seals 

• Loose fittings or connectors 

• Drips around fluid reservoirs or under the car 

Identifying visible damage early allows a mechanic to address the root cause rather than just treating symptoms. 

4. Limit Driving UntilTheIssue Is Resolved

   Even minor leaks can escalate quickly. For safety: 

• Avoid long journeys or high-speed driving 

• Only drive short distances to a trusted garage if necessary 

• Brake fluid or transmission leaks require immediate attention; do not attempt long drives 

Tip: If unsure about severity, call a roadside assistance service to avoid risk. 

5. Clean Up Any Fluid Spills Safely

   Fluid spillsaren’t just messy; they can be hazardous: 

• Brake Fluid & Coolant: Toxic and slippery, clean immediately to prevent accidents or harm to pets 

• Engine Oil & Transmission Fluid: Can stain driveways or pavements; absorb with paper towels or cat litter 

• Safety: Wear gloves and dispose of used towels or rags responsibly 

6. Seek Professional Inspection Promptly

   A professional inspection ensures no hidden damage:

• Mechanics can perform a thorough diagnostic check, identifying leaks from seals, gaskets, or internal components 

• Early detection prevents expensive repairs and ensures safe vehicle operation 

• It also helps maintain warranty coverage and car value 

Tip: Mention when the leak started, the fluid type, and frequency to help the mechanic pinpoint the issue faster. 

7. Keep RecordsOfAny Observed Leaks

   Tracking details of leaks is valuable for maintenance history: 

• Record date, fluid type, severity, and location of each leak 

• Note any patterns, e.g., after long drives or cold starts 

• This helps mechanics monitor recurring issues and provides evidence if warranty repairs are needed 

8. Monitor Fluid Levels Regularly

   Even after repairs, continue monitoring:

• Check dipsticks and reservoirs monthly or before long journeys 

• Watch for any drops in levels or puddles forming under the car 

• Preventive checks can catch slow leaks before they cause major damage 

9. Understand Long-Term Causes

   Leaking fluids often point to wear and tear or ageing components:

• Worn gaskets, seals, or hoses degrade over time 

• Corrosion or damage to the underbody or engine components 

• Loose fittings from vibration or improper servicing 

Recognising these early helps you take preventive action rather than reacting to emergencies.  

Check your car for leaks, top up fluids, and fix issues quickly. Plus, following practical car maintenance tips helps keep your vehicle safe and reliable.  

Conclusion 

A car leaking fluid can seem minor at first, but even small drips can signal serious underlying issues. Ignoring leaks can lead to engine damage, overheating, compromised braking, or steering problems.  

At Bromley Vehicle Test Centre, we prioritise honesty, transparency, and thorough inspections. Our experienced team can identify the source of leaks quickly and recommend the most appropriate solution, without unnecessary work or inflated charges. With decades of experience, we continue to uphold our family-run values, ensuring every vehicle is treated with care and precision. 

If you notice any fluid under your car or suspect a leak, don’t wait. Contact us today on 020 8460 6666 or email inf to schedule a check-up and protect your car, your safety, and your peace of mind.