Open the hood and locate the coolant reservoir. In most BMW models, this small black tank is to the left of the engine, but this isn’t always the case. Double-check your owner’s manual if you’re not sure what to look for.
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Can you just add coolant to the reservoir?
If the coolant level is low, add the correct coolant to the reservoir (not the radiator itself). You can use diluted coolant by itself, or a 50/50 mixture of concentrated coolant and distilled water. When the coolant rises to the cold fill line, replace the cap and tighten it until you feel it click.
How do you top up the coolant on a BMW 5 Series?

Can I add any coolant to my BMW?
BMWs have specific coolant requirements (nitrite and phosphate free) to prevent build-up and corrosion of aluminum components, so not just any off-the-shelf antifreeze will do.
Should the coolant reservoir always be full?
Your coolant reservoir tank should be at least 30% full. Most reservoir tank has a min and max mark drawn on the side of the container. What is this? The most common cause of a coolant leak is a bad radiator cap, bad radiator fans, and loose radiator hose clamps.
Can you mix old and new coolant?
If it comes to mixing different brands there is no problem, when it comes to old versus new, its okay to mix old and new as long as they are of the same type.
Why does my BMW keep saying low coolant?
Reasons Why Your Coolant Might Be Low leak in radiator. leak in radiator hoses. leak in water pump. damaged or broken radiator seal.
Where does engine coolant go in BMW 5 Series?

Why does BMW use blue coolant?
We recommend using BMW’s “Blue” coolant in your car because it is silicate & phosphate free, and has a much longer lifespan inside of your car’s cooling system.
Can I use Autozone coolant in my BMW?
1. Go buy a gallon of coolant from your BMW dealer (DO NOT use any other coolant brand).
How do I know if my BMW needs coolant?
- BMW coolant light on.
- Low engine coolant level message on iDrive.
- Engine overheats.
- BMW coolant light on, then off after driving.
How long can you drive with low coolant?
If your car has a low coolant you can drive for some time. It really relies on the level of coolant. If it is low but it is above the minimum, you can drive your car for a few days. But if it is below the minimum, please do not even try to run your engine.
What happens if you overfill coolant?
Most of the time, excess coolant is expelled from an overflow hose. You’ll likely see a puddle of coolant beneath your car if this has happened. In worst case scenarios, overfilling your antifreeze tank can lead to electrical damage if overflow comes into contact with engine wiring.
Is coolant the same as antifreeze?
Engine coolant, also known as antifreeze, is mixed with water to keep the radiator from freezing in extreme cold and overheating in extreme heat. There are many different types of coolant, so it’s important to know what variety is right for your car or truck.
Does BMW coolant need to be mixed with water?
Keep in mind, you never want to pour antifreeze or water by themselves into your engine system. They need to be combined to create the good coolant.
Is it OK if coolant is a little low?
Your engine could overheat. Coolant helps pull heat away from the engine. So, without enough coolant, the engine could overheat or seize up. Continued use of an overheated engine could lead to permanent damage, such as pistons welding to the cylinders.
How long should I wait to start my car after adding coolant?
Once the hood is open, there’s a risk of being sprayed with hot water or steam. “Your personal safety is most important,” he says. “Waiting for at least 15 minutes allows the hood, engine and leaking coolant to cool.”
Why is my coolant low but no leaks?
When you are losing coolant but no leak is visible, several parts could be the guilty party. It could be a blown head gasket, a fractured cylinder head, damaged cylinder bores, or a manifold leak. It could also be a hydraulic lock.
Is it OK to add new coolant without draining the old?
There is no problem with just topping up the coolant. You can add the coolant without flushing out the old. However, with time, the older coolant becomes acidic. This can cause corrosion, and afterward, can cause defects in the cooling system.
How often should you need to top up coolant?
You need to check your engine coolant at least twice a year before summer and winter, ideally. Although, this advice may vary between car manufacturers. Coolant should be topped up whenever the level drops below the guide marks.
Can I replace coolant myself?
You can change your coolant yourself in about an hour. You’ll need to invest in an air-powered refilling tool to remove air pockets from the cooling system as you fill. You’ll save about $50 on your first coolant change and about $100 on each one after that.
Can you drive a BMW with coolant light on?
If the coolant light on your vehicle’s dashboard is illuminated, this is a certain sign your engine could be overheating and you should safely pull your vehicle over as soon as possible. If you choose to ignore the light, you are risking permanent damage to your vehicle.
What is the recommended coolant for BMW?
Zerex G-48 Formula Full Strength Coolant The ZEREX G-48 coolant is ideal for BMW cars. Designed for both diesel and gasoline engines, the coolant has low-silicate, pH, anti-phosphate technology that protects all metals, like aluminum against corrosion.
How do you top up BMW coolant?

What color antifreeze does BMW use?
Genuine BMW green HT-12 antifreeze for optimal cooling system performance. Compatible with all BMW models.