chris-the-gerbil
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OK as others have said the cap is the yellow one in front of the flat drum which is the brake booster.
Most cars have the critical caps in yellow - brake fluid, engine oil, engine filler etc.
You do not want any oil in there at all. Engine oil will kill the braking system dead - even a few drops. Keep everything clean and only pour brake fluid from the container directly into the reservoir. Also keep it all clean - wipe the top of the cap etc with a clean rag before you undo it.
You will want DOT 4 or 5.1 specification fluid. Something like this https://autohub.pk/products/liqui-moly-brake-fluid-dot-4-synthetic-250ml
If you spill it on painted surfaces it attacks paint - flush it off with water if you do.
Can you get a photo of the colour of the fluid with the cap off? Old fluid goes dark and can cause problems. New fluid is clear and pale yellow usually.
Fill it up - then try the brakes again. You might need to bleed the system or the calipers which we will come to...
Most cars have the critical caps in yellow - brake fluid, engine oil, engine filler etc.
You do not want any oil in there at all. Engine oil will kill the braking system dead - even a few drops. Keep everything clean and only pour brake fluid from the container directly into the reservoir. Also keep it all clean - wipe the top of the cap etc with a clean rag before you undo it.
You will want DOT 4 or 5.1 specification fluid. Something like this https://autohub.pk/products/liqui-moly-brake-fluid-dot-4-synthetic-250ml
If you spill it on painted surfaces it attacks paint - flush it off with water if you do.
Can you get a photo of the colour of the fluid with the cap off? Old fluid goes dark and can cause problems. New fluid is clear and pale yellow usually.
Fill it up - then try the brakes again. You might need to bleed the system or the calipers which we will come to...