Oil Caps & Breather Pipes

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About our oil caps

Oil caps are cheap car parts that protect your car from expensive damage. They keep the oil in your engine from contamination and your engine working perfectly. Oil filler caps can crack, snap or get lost while you’re working on your engine. Luckily, a replacement oil cap is simple and easy to find with Halfords.

Need a replacement breather pipe?

As well as replacement oil caps for cars, we also stock breather pipes that keep the oil circulating through the engine. When your engine is stopped, the breather pipe enables the oil to collect in the sump, where it can be collected and reused. Breather pipes perform an essential role, but over time can fray, split or crack - leading to leaky oil and potentially expensive engine damage.

Order breather pipes and oil caps from Halfords

Replacing the oil filler cap or fitting new breather pipe are cheap and easy repairs for the DIY mechanic. If you’re confident with a spanner, you can find the OEM spares and aftermarket replacement parts with our select tool. Add your registration and you’ll only see the right parts for your make and model. You can shop online, or use our Click and Collect service to get your car parts package delivered to your local Halfords store where you can collect it the next day.

Oil Caps and Breather Pipes FAQs

Can you drive a car without engine oil cap?

Driving without the cap isn’t safe. Oil will spill out and dust or dirt can get inside the engine. That can cause damage very quickly. If you’ve lost the cap, it’s best to get a new one fitted straight away. Halfords can help you find the right replacement.

Can I open the oil cap when the car is hot?

You can, but you need to be careful. When the engine is hot there may be pressure inside, so hot oil or fumes could escape. Let it cool down a bit first, and if you have to open it, use a rag or glove so you don’t burn your hand.

Are oil filler caps universal?

They’re not. Different makes and models use different caps, and the wrong one may not seal properly. The easiest way to be sure is to match it to your car. Halfords lets you enter your registration so you can pick the right one.

What does a breather pipe do on a car?

It lets gases escape from the engine and helps oil flow back to where it should be. This keeps pressure under control and stops damage to other parts.