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850 Odometer Fix

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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BlackBart
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850 Odometer Fix

Post by BlackBart » Fri Sep 27, 2019 11:18 am

Has anyone been through this process of replacing broken odometer gears? I recently discovered my replacement gears in a hidden parts stash.

Looks like a lot of very careful steps.

https://www.matthewsvolvosite.com/odome ... o-850.html


ex-1984 245T wagon
1994 850T wagon
2004 XC70 wagon BlackBetty
Is it time for a 1964 122 wagon?

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Re: 850 Odometer Fix

Post by Klausc » Fri Sep 27, 2019 12:12 pm

Been there, done that. I prefer lifting the entire dash so I don't have a problem with the fitting at the right side of the center console.

There are a lot of steps, but none very difficult. You will need some small torx tools, a T10 and T8? First, get the correct odometer reading from the instrument cluster using OBD. Port A-7.

Remember to keep the key out of the ignition and lower the steering wheel and pull it back as far as possible.
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Re: 850 Odometer Fix

Post by BlackBart » Fri Sep 27, 2019 1:16 pm

Thanks - I'll check on T8 size. Is a 1/4" socket or a screwdriver the better tool? I have a 1/4" flex driver for tight spots.

I've seen something about being able to look up the odometer reading there. Can you add the miles back on to the odometer?


ex-1984 245T wagon
1994 850T wagon
2004 XC70 wagon BlackBetty
Is it time for a 1964 122 wagon?

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Re: 850 Odometer Fix

Post by erikv11 » Fri Sep 27, 2019 5:44 pm

It's funny, it used to be that a big chunk of active members on the forum had done the odo gears, now with the P80s retiring it is probably very few.

You're not lifting the entire dash - just the top dash pad. But I agree, remove the dash pad don't bend it. At this vintage bending it may crack it. It may crack anyway, go easy on the dash pad and support it when lifting.

Socket ratchet, screwdriver, it doesn't really matter. These fasteners are all easy to access and lightweight.
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'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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Re: 850 Odometer Fix

Post by ZionXIX » Fri Sep 27, 2019 9:30 pm

You can replace the broken gears and manually turn the odometer to correct the mileage. It could take a while thought.



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Re: 850 Odometer Fix

Post by BlackBart » Sat Sep 28, 2019 7:13 pm

...20.......25.......30......35.......


ex-1984 245T wagon
1994 850T wagon
2004 XC70 wagon BlackBetty
Is it time for a 1964 122 wagon?

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Re: 850 Odometer Fix

Post by erikv11 » Sat Sep 28, 2019 11:22 pm

Are you using a drill with a pencil eraser in the chuck? Or even better yet a drill press, just go easy on the pressure.


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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Re: 850 Odometer Fix

Post by abscate » Sun Sep 29, 2019 6:29 am

A Dremel might run faster?
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Re: 850 Odometer Fix

Post by erikv11 » Sun Sep 29, 2019 11:20 am

Heck yeah.


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

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BlackBart
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Re: 850 Odometer Fix

Post by BlackBart » Sun Sep 29, 2019 11:44 am

“Your car has 750,000 miles?!”


ex-1984 245T wagon
1994 850T wagon
2004 XC70 wagon BlackBetty
Is it time for a 1964 122 wagon?

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