Practical information -> Checking levels for Your Citroen C3 Aircross SUV Second Generation (2024-2026)

Practical information  
The locations of the following components may  
vary:  
– Air filter.  
– Engine oil dipstick.  
– Engine oil filler cap.  
Electric engine  
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Petrol engine  
►ꢀ Lift the exterior safety catch and raise the  
bonnet.  
►ꢀ Unclip the stay from its housing and place it  
in the support slot to hold the bonnet open.  
1. Screenwash fluid reservoir  
2. Engine coolant reservoir (level only)  
3. Brake fluid reservoir  
4. Battery/Fuses  
Closing  
5. Fusebox  
6. 400 V electrical circuit  
7. Emergency circuit-breaker for emergency  
1. Screenwash fluid reservoir  
2. Engine coolant reservoir  
3. Brake fluid reservoir  
4. Battery/Fuses  
5. Fusebox  
6. Air filter  
►ꢀ Hold the bonnet and pull out the stay from  
the support slot.  
►ꢀ Clip the stay in its housing.  
►ꢀ Lower the bonnet and release it near the  
end of its travel.  
►ꢀ Pull on the bonnet to check that it is locked  
correctly.  
services and maintenance technicians  
For more information on the Charging system  
(Electric), refer to the corresponding section.  
7. Engine oil filler cap  
8. Engine oil dipstick  
Checking levels  
Because of the presence of electrical  
equipment under the bonnet, it is  
strongly recommended that exposure to  
water (rain, washing, etc.) be limited.  
Check all of the following levels regularly in  
accordance with the Manufacturer's service  
schedule. Top them up if required, unless  
otherwise indicated.  
If a level drops significantly, have the  
corresponding system checked by a CITROËN  
dealer or a qualified workshop.  
Engine compartment  
The engine shown here is an example for  
illustrative purposes only.  
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Practical information  
The fluids must comply with the  
Manufacturer's requirements and with  
the vehicle's engine.  
It is normal to top up the oil level between two  
services (or oil changes). It is recommended  
that you check the level, and top up if  
Oil grade  
Before topping up or changing the  
engine oil, check that the oil is suitable  
for your engine and complies with the  
recommendations in the service schedule  
supplied with the vehicle (or available from  
your CITROËN dealer or qualified workshop).  
Use of non-recommended oil may invalidate  
your warranty in the event of engine failure.  
necessary, every 3,000 miles (5,000 km).  
Take care when working under the  
bonnet, as certain areas of the engine  
may be extremely hot (risk of burns) and the  
cooling fan could start at any time (even  
with the ignition off).  
In order to maintain the reliability of  
the engine and emissions control  
system, never use additives in the engine oil.  
Checking using the dipstick  
For the location of the dipstick, please refer  
to the illustration of the corresponding engine  
compartment.  
►ꢀ Grasp the dipstick by its coloured grip and  
pull it out completely.  
►ꢀ Wipe the end of the dipstick using a clean,  
lint-free cloth.  
Topping up the engine oil level  
For the location of the engine oil filler cap,  
please refer to the corresponding engine  
compartment illustration.  
Used products  
Avoid prolonged contact of used oil or  
fluids with the skin.  
Most of these fluids are harmful to health  
and very corrosive.  
Never remove the oil filler cap with the  
engine running. Risk of burns and  
splashes inside the engine compartment.  
Do not discard used oil or fluids into  
sewers or onto the ground.  
Empty used oil into the containers reserved  
for this purpose at a CITROËN dealer or a  
qualified workshop.  
►ꢀ Add oil in small quantities, avoiding any spills  
on engine components (risk of fire).  
►ꢀ Wait a few minutes before checking the  
level again using the dipstick.  
►ꢀ Top up the level if necessary.  
►ꢀ Reinsert the dipstick and push fully down,  
then pull it out again to visually check the oil  
level: the correct level is between marks A  
(max) and B (min).  
Do not start the engine if the level is:  
– above mark A: contact a CITROËN dealer or a  
qualified workshop.  
►ꢀ After checking the level, carefully screw the  
oil filler cap back on and push the dipstick back  
into its tube up to the stop.  
Engine oil  
The level is checked, with the engine  
having been switched off for at least 30  
minutes and on level ground, either using the  
oil level indicator in the instrument panel when  
the ignition is switched on (for vehicles  
equipped with an electric gauge), or using the  
dipstick.  
The dipstick must be pushed  
completely in to prevent oil from  
spilling onto the engine. Risk of fire inside  
the engine compartment.  
– below mark B: top up the engine oil  
immediately.  
138  
Practical information  
The oil level indication displayed on  
the instrument panel when the  
ignition is switched on is not valid for  
30 minutes following an addition of oil.  
As the cooling system is pressurised, wait at  
least one hour after switching off the engine  
before carrying out any work.  
In order to avoid the risk of scalding if you need  
to top up in an emergency, wrap a cloth around  
the cap and unscrew the cap by two turns to  
allow the pressure to drop.  
Fluid specification  
The fluid must be topped up with a pre-mixed  
product.  
In winter (temperatures below zero), a fluid  
containing an anti-freeze agent which is  
appropriate for the temperature conditions  
must be used in order to protect the system's  
components (pump, tank, ducts, jets).  
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Brake fluid  
The level of this fluid should be close to  
the "MAX" mark. If not, check the brake  
pads for wear.  
Once the pressure has dropped, remove the cap  
and top up to the required level.  
Filling with pure water is prohibited in  
all circumstances (risk of freezing,  
limescale, etc.).  
For electric versions  
To know how often the brake fluid should be  
replaced, refer to the manufacturer's servicing  
schedule.  
Do not top up the coolant.  
Clean the cap before removing it to  
refill. Use only DOT4 brake fluid from a  
sealed container.  
Checks  
Unless otherwise indicated, check these  
components in accordance with the  
Manufacturer's service schedule and according  
to your engine.  
If the level is close to or below  
the "MIN" mark, it is essential to contact a  
CITROËN dealer or a qualified workshop.  
Engine coolant  
For petrol or hybrid versions  
It is normal to top up this fluid between  
two services.  
The check and top-up must only be done with  
the engine cold.  
A level of coolant that is too low risks causing  
major damage to the engine; the coolant level  
must be close to the "MAX" mark without ever  
going above it.  
If the level is close to or below the "MIN" mark,  
it is essential to top it up.  
Otherwise, have them checked by a CITROËN  
dealer or a qualified workshop.  
Only use products recommended by  
CITROËN or products of equivalent  
quality and specification.  
In order to optimise the operation of  
components as important as those in the  
braking system, CITROËN selects and offers  
very specific products.  
Cooling of the engine when stopped  
The engine cooling fan may start  
after the engine has been switched off.  
Take care with objects or clothing that  
could be caught in the blades of the fan!  
Screenwash fluid  
Top up to the required level when  
necessary.  
When the engine is hot, the temperature of the  
coolant is regulated by the fan.  
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