Basically remarkably unhelpful and despite being Halfords don't seem to have diagnostic tools, schematics for cars (I asked the manager....he said no we don't, whilst trying to find out which bolts and exhaust fittings I needed to buy...horse's mouth), or even access to spare parts. Neither are they clear on the fact they won't repair your car unless they source the products for the car, it's company policy and there are no notices anywhere at their centre or on a website to tell you that (you've been warned); apparently they were doing me a favour. Ironically it was only after me having the car trailer carried to them was I told they don't fit non Halfords parts. They didn't stop me booking it in though after it's MOT and previous conk out, despite me telling them we had a DPF to fit prior to and not from them which ironically in the end didn't fit (which admittedly I'd sourced from somewhere else via number plate recognition and he showed me a photograph so...it did look different and I had no trouble getting a refund from where I'd bought it from) but it took me many phone calls and two weeks to find out what the car needed and get it back (they wanted me to source the parts for them). This sorry saga of arguments started after them having the car 5 days only to tell me they couldn't do the job because they needed bolts for the DPF (apparently they melt). Never phoned me earlier to tell me that so the car was obviously sat outside Halfords most of the time. I wasn't happy and had a rant and he sort of tried to guilt trip me. He went on to give me a diatribe on how many hours they'd worked on it which was far longer than they should have as my part is buried deep in the car (not according to Nissan mind)....so it was my fault their mechanics couldn't phone me to tell me straight away it couldn't be done...ah...sorry for that if only I could mind read, so sorry for that one. The trouble with his argument was that it made no sense as he couldn't take the part off nor actually used a computer to check what was really wrong so it all became a bit of a weird merry go round of reasons and excuses. I kept getting conflicting explanations from two different managers. One said they'd had the car in pieces and found they couldn't get it off (obviously they've no nut splitters...maybe they should try Eurocarparts across the way) and one said they were still working on it. Cut a very long and convoluted argument short I just said leave it and we'll get it taken away to someone else and he said he wouldn't charge us for all this work and time our car (shame on me) had taken up and wasted their life on (unlike the £50 I'd already wasted delivering it to them and the running around I'd done to find parts that they couldn't be exact on...it was described exhaust bolts first....then it was a DPF fixing kit (which as Nissan stated doesn't exist, they're individual parts it's not a kit) I could have bought loads of unnecessary nuts and bolts if it weren't for the real hero that was Mr. L. Monty of Nissan Wigan...and he was only covering the post there until returning to Nissan Chorley. As stated the big saviour in all this was Mr. L. Monty who worked at Nissan (embarrassingly round the corner and if I'd know should have taken it to them but I don't know Wigan at all). Mr. Monty was their parts desk person and was baffled why Halfords didn't ask them directly as after all I didn't know what I was looking for. This fellow went above and beyond his job. He took over for me, phoned Halfords, told me what I needed which I bought and as I live in Leigh he saved me not just a trip but money and even nipped round and took them there for me on his way home. Nissan of Wigan your Mr. L. Monty is a prince amongst men and a credit to your company. Then I got told by Halfords (after more badgering of when would the car be ready) the AA man was wrong (which was quite possible as of course he couldn't dismantle the thing like you could in a garage) as the DPF wasn't really all that blocked and I was given some melted pressure switch thing which was meant to be the culprit. On the way home the orange warning light come on but they did warn that could happen and they'd take it off but they recommended we put in some cleaning stuff/toxic gunge regularly and actually it went ok for a bit and the engine returned to normal....briefly. Then it started losing power again on hill climbs so we took it for a run and it sort of worked ok but it was not really pulling very well on inclines then it all turned sour. Anyway it cost me over £200 only for the car to go back to major fault (red) in the space of two months. I can't be bothered to argue with them as it's too much like hard work. Taken it to another garage now and the DPF is apparently severely clogged up so....I just think Halfords wanted their pound of flesh for all the time I'm guilty of wasting for them. Sort of revenge really I suppose. Just goes to show you cannot trust even the big company's anymore. Funnily enough I won't ever go there again and I fact have decided I will never shop at any Halfords for anything ever again, bicycle, tool or otherwise....you've had your last penny off me. Hopefully soon we'll have an electric car and well....I can repair electrics....