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Ok, starting off with the fuel pump itself then...
Tools used by me on both jobs... just basic bits..
A good bit of rag or an old t-shirt is definitely recommended here to deal with any fuel spillages.
A socket bar with an extension and an 8mm bit is highly recommended for both jobs. No other bits are needed, just the 8mm.
10mm ring spanner (battery)
A thin screwdriver/pryer/anything similar
A long thin rod/bar/screwdriver/anything similar.
A pair of grips. Not mole grips, something smaller.
Stanley knife/scissors/anything that cuts, should you use cable ties.
3x standard cable ties (optional if you can get the metal crimps to fit back on again.)
Can of WD-40 (optional)
Bit of tissue (optional)
Ok... First, disconnect the battery earth lead. This is a must when working on the fuel system. If the car has just been driven, depressurize the fuel system, ( open the filler cap to let pressure out, disconnect no.11 fuse for the pump, and wait approximately 15-20 mins for the system to depressurize itself. Note that this will not get rid of complete pressure, but is the starting step.
Next, open the rear offside passenger door and lift the seat bench up, and rest it against the back of the driver's seat, making sure it won't fall down. If it falls back down, recline the drivers seat forward and tuck the rear seat in until it stays there. Next, you will see a small flap under the rear seat. Open it, and flatten it out backwards. There will be a black round rubber plate. Get a thin pryer/screwdriver and pry it open using the little handle on it. You will now see this...
Disconnect the pump's electric plug by gently prying apart the 2 plastic tags. (red arrows) Once disconnected, tuck it in out of the way somewhere. It will probably try to come back again, so it is a bit fiddly. Could always use a bit of blue tack to stick it to somewhere.
Next, get the socket set and undo one of the bolts on the pump unit. Most of the pressure should have gone by now, but as you lift the bolt out, the last of it may escape with a slight hiss. You will be able to smell petrol at this point. Now, the fuel hose that you see there, should have a metal crimp on it. Get that off by using grips to pry off the crimp and put it to one side. Gently but firmly, push the hose off from the pipe. A bit of fuel may leak out at this point, so have the rag on standby here. Latex gloves could be useful too if you don't want it getting on your hands.