Hello, I have a mk1 Ford Focus here, 2005 1.8 TDCi facelift model. Was driving home on Friday and noticed that my brake pedal felt unusually stiff. I pulled over when it was safe to do so and popped the bonnet to see if there was anything unusual. I couldn't see anything out of the ordinary, but over a month ago, I was being daft and accidentally broke the brake servo vacuum pipe at section where the pipe connects to the non-return valve. I used plastic weld and mended the pipe though. I was always planning on having this pipe renewed by never got around to it. I managed to nurse the car home because luckily I had been working overtime that night so there wasn't an awfully large amount of traffic, plus I was less than a mile away from completing my trip. I haven't driven in the car since. My question is, has anyone else experienced something similar to this before? I've been looking around and trying to source a replacement vacuum pipe with a non-return valve, but so far I haven't found anything. I contacted Ford Parts and they emailed me through ten different diagrams, but none of them seemed to match the pipe/set-up I was looking for. I contacted a few breakers yards but no luck. I'm going to contact a few more tomorrow morning. Also, would this pipe likely be the cause of my problem? Can non-return valves cause these issues, and are there any simple checks I can do at home by myself? I can disconnect the vacuum pipe from the front of the engine bay, beside the intercooler, because it's easily accessible, but I can't seem to find out where the pipe then leads to, because it seems to go right along the back of the engine under the scuttle panel. Would anyone be able to give me a few pointers or have a diagram for this? I can post a picture of my engine bay if necessary. I have also taken a video recording. Right now, any help would be greatly appreciated. I'm having to take alternative means of transport to work at the moment which is costing me a fair bit more than it usually would. The quicker I get this sorted, the better. Thanks FOC.