Hello, new to this site so don't know if this subject has been explored before much on here. Have what I define as a 'part time' problem (apparently a fairly common problem) with my Peugeot Boxer 2003 2.0 HDI. After driving for a while the speedo needle behaves at odd times as if with a mind of its own e.g. showing 80 when actually doing around 40 etc. also sometimes when engine hot and vehicle is stationary speedo needle will still move often when clutch is depressed. (Electrical connections all seem o.k.) It seems to point to a 'not uncommon problem' as described by local Pug garages and another mechanic as a faulty electronic speed sensor 'sender' unit (a small white nylon unit plugged in a socket on the lower rear of the gearbox /diff case) The unit has a 3 terminal electrical connector block on to send the signal to the speedo and a small nylon drive spline that goes into the gearbox casing. My first main question is this, on the off chance anyone else has experienced the same problems on a Boxer (or C: Ducato) and succesfully cured it by replacing this sender unit. Interestingly the Peugot dealers I have spoken to have stated computor says I need part no 616083 at £115.00 !! for the Boxer and the spline drive unit is not even included (use the old one) However what looks like an identical unit. part 616070 although computor says it is primarily listed for the Peugot car range and is around £40.00 ! (around £14.95 on ebay) Peugot dealer said it might be the same up to me to try it (no refund of course if not suitable)oh: A Peugot breaker has also offered a recycled one at £24 and he claims both listed items above do the same job just use the correct nylon spline drive bit ? Doesn,t look too difficult a job to replace this unit. if the lower priced one does the same job I dont feel like paying for the dearer option. ?? Any feedback from others having had this speedo problem most appreciated.