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Premium Member
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285 Posts
Discussion Starter #1
Hi all,

Has anyone had any experience of the vehicle speed sensor going faulty after changing the gearbox oil?

Following a service and gearbox oil change my cars speedo no longer works. The garage I used is trusted and I supplied genuine parts and correct oils etc.

I've been back to the garage and he removed the under tray and checked for anything obvious. He ran a diagnostic that came back with no input being received from the vehicle speed sensor. He removed the sensor, cleaned it up and refitted it. The speedo did then work, although erratically before eventually giving up and sticking on 0 mph again. He was honest and said that he's not sure if it's the sensor itself or the wiggling of the wires that got it to give some sort of reading. Would a auto electrician be able to pinpoint the issue or would it be cheaper and easier to replace both the sensor and wiring?
 

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more torque than the mrs
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6,748 Posts
garage is at fault if it was working when you took it there and now its not they have somehow damaged the speedo sensor, tell them it needs sorting or you will get advice from trading standards..
 

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Premium Member
Joined
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285 Posts
Discussion Starter #4
He didn't remove the sensor when he changed the oil, it just stopped working after changing the oil. I went into the pit with him and he showed me where the sensor is located. He removed it, cleaned it up and fitted it again. I'd seen the thread with the smashed sensor so I made sure he checked for the little spacer. The only issue was there was a shallow groove worn into the face of the sensor. I've ordered a new sensor from a breakers yard for £46 delivered. A picture of the sensor should be below.



I just think the car is slowly giving up, I've replaced the clutch and DMF, air con doesn't work anymore, dash rattles, passenger window switch is intermittent and the passenger side folding mirror doesn't fold all the way in.
 

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Clutch pedal guru
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5,127 Posts
So is it sorted now then?
 

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more torque than the mrs
Joined
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6,748 Posts
pure bad luck mate mines not cost me anything in almost 3 years of ownership apart from service items, when i bought it the garage gave me 6months warranty had to use it 3 times in that time .touch wood its been a great motor..
my problems were
subframe click
clutch master cylinder click
sunroof blinds..
 

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Premium Member
Joined
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285 Posts
Discussion Starter #7
Still not sorted, not even getting a fault code anymore so looks like it properly died. Using a sat nav for a speedo until the sensor comes. Just got to be careful as the steering is very light and you can put it into reverse at any speed. The fuel gauge and trip computer are way out and the odometer doesn't go up either. I'm hoping that the sensor will mean it's a simple fix and I can get a couple of trouble free years before going back to VW.
 
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