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S70 / V70 front seat swap to 850

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

S70 / V70 front seat swap to 850

Postby t5rrr » 28 Mar 2010, 02:24

I recently swapped front seats from a junkyard 98 V70 into my 94 855. My 855 front seats had a nasty black dye applied, some seams tearing and the driver power seat recline was not working when I bought the car.

Passenger side was cake, driver side had some challenges, so here goes...

Here's a step by step of the passenger seat (manual type):

remove seat bolts
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Detach seatbelt and remove the bracket
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unplug harness of seat heater and remove seat from car
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Prep V70 seat
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Remove seatbelt bracket from V70 seat
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Bolt in 855 seatbelt bracket into V70 seat
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Remove V70 seatbelt latch
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Remove 855 seatbelt latch and install into V70 seat
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Install prepped V70 seat into 855 and bolt everything in and replace the side cover before replacing height adjustment handles.
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One thing to note is the V70's height adjustment handles have a plastic tab on the inside that needs to be wedged slightly to remove the handle, I broke the first one trying to force it out with a screwdriver :o Have to hit the junkyards again to get another handle.
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Wagon Brigade >> 94 855 NA | 97 Subaru Impreza OBS | 07 Suzuki SX4
Previous Bricks >> 90 240 GLE 2.0 | 98 S70 T5A 2.0 | 03 XC90 T6 2.9
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Re: S70 / V70 front seat swap to 850

Postby t5rrr » 28 Mar 2010, 02:34

On to the driver side powered seat

Unbolt seat, remove seatbelt, unplug harness and remove from car
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Driver seatbelt bracket is riveted so time to break out the heavy tools!
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Used air hammer to chisel the rivet off
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Adapt the 855 seatbelt bracket into the V70 seat, I had to rearrange some washers from V70 seat's original seatbelt bracket to work with the 855 bracket so it'll stay firmly in place.
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855 seatbelt latch has wiring harness that I cut and spliced into the V70 seat (for the seatbelt warning light)
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Install prepared V70 driver seat into 855 and plug in control harness (note the airbag lockout tag)
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Remove and store the airbag lockout tag
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Install seatbelt into bracket and cover
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Enjoy fruits of labor
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Wagon Brigade >> 94 855 NA | 97 Subaru Impreza OBS | 07 Suzuki SX4
Previous Bricks >> 90 240 GLE 2.0 | 98 S70 T5A 2.0 | 03 XC90 T6 2.9
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Re: S70 / V70 front seat swap to 850

Postby heat391 » 28 Mar 2010, 15:05

Just a couple quick questions, since the '94s didn't have the side airbags, what did you do with the wiring for the seat's airbag?

Do you know if it is possible to wire the airbags into the sis system?
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Re: S70 / V70 front seat swap to 850

Postby t5rrr » 28 Mar 2010, 18:03

To my understanding the side airbags are mechanically actuated, hence the red stopper gizmo to prevent the side airbags from deploying during transportation.

During the swap I did not notice additional wiring or harness that was on the V70 that my 855 did not have.
Wagon Brigade >> 94 855 NA | 97 Subaru Impreza OBS | 07 Suzuki SX4
Previous Bricks >> 90 240 GLE 2.0 | 98 S70 T5A 2.0 | 03 XC90 T6 2.9
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Re: S70 / V70 front seat swap to 850

Postby Ozark Lee » 29 Mar 2010, 02:03

T5rrr, you are correct. The triggers for the SIPs bags are pyrotechnic and they are triggered by force alone, it is not electrical. Good job on this. The thing that always had me flummoxed from looking at VADIS was the difference in the seat belt mounts and you solved that problem.

...Lee
'94 850 N/A
'96 850 N/A
'96 Platinum Edition Turbo
'98 S70 T5
'99 V70XC - RIP Killed by a drunk driver.
Previous: 1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe
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Re: S70 / V70 front seat swap to 850

Postby 850 Turbo1 » 29 Mar 2010, 05:26

t5rrr wrote:To my understanding the side airbags are mechanically actuated, hence the red stopper gizmo to prevent the side airbags from deploying during transportation.

During the swap I did not notice additional wiring or harness that was on the V70 that my 855 did not have.



Thanks so much for the writeup...I will probably be doing this soon enough!

My tan seats are not looking too great :(
1996 850 T5 Sedan
1996 850 T5 Platinum Edition Wagon
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Re: S70 / V70 front seat swap to 850

Postby michaelairllc » 08 Apr 2010, 20:35

This is a great fix for old seats. One thing I found is that you can swap out the lower part of the attaching seat rail with 4 screws and avoid any drilling for the seat belt swap out. Just be sure that the rails are in the same position on the gear when reinstalling (preferably all the way aft). I was curious why the seat belt coupler needed to be changed from one seat to another. Great info on Airbags.
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Re: S70 / V70 front seat swap to 850

Postby karmasai » 19 Aug 2011, 18:33

I'd like to know if I'm mistaken, but it seems like all first generation Volvo 70 series cars use the same seat mount points as the 93-97 850 for the front seats... am i right?

that being said, can this be done from a 2000 S70 or a 2002 C70 rather than a '98 S70? As for the S70 I know there are some engine differences between the 98 and 2000, but I'm not sure if there were any interior changes. As for the C70 I learned to drive on an 850 and now drive a c70, but there is a 15 year gap between my ownership of the two cars.
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Re: S70 / V70 front seat swap to 850

Postby Matty Moo » 06 Sep 2011, 09:15

Kickass write-up. Didn't know it existed until I needed it yesterday.

Bought a VERY nice set of charcoal seats out of a 99XC for my Platinum. Once I got them home and cleaned up, the seat belt mounting issue had me perplexed and contemplating doing something stupid. I probably sat there for an hour, pulled this up on my phone and had the fronts replaced in no time flat.

The only issue I have to figure out is the power situation to the passenger seat. My original seats were memory, and the XC seats aren't. The passenger side wiring is slightly off somehow...one harness is slightly different.
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1996 850 Platinum Wagon. ARD Green Tune, OBX.
1998 s70 ARD tune, EST exhaust, SE/R interior.
1999 s70 Plain Jane.
2007 Chrysler 300c
2012 Jeep Wrangler Unlimited
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Re: S70 / V70 front seat swap to 850

Postby Faust » 16 Jan 2012, 00:22

michaelairllc wrote:This is a great fix for old seats. One thing I found is that you can swap out the lower part of the attaching seat rail with 4 screws and avoid any drilling for the seat belt swap out. Just be sure that the rails are in the same position on the gear when reinstalling (preferably all the way aft). I was curious why the seat belt coupler needed to be changed from one seat to another. Great info on Airbags.


Could you explain that a little more? I have a pair of v70 seats to go in my 855, not sure I see the screws you mention. My 855 seats are not power, is there a difference?
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Re: S70 / V70 front seat swap to 850

Postby Faust » 19 Jan 2012, 23:04

I just tried this swap, I found the wiring quite different between my 855 seats and the v70. My 855 seats were both manual, the v70 seats were manual for the passenger, power for the driver's. I assumed I would find the power seat wiring when I removed the manual seat, not the case. So, I ended up swapping the skins from the v70 to the 855 seats.
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Re: S70 / V70 front seat swap to 850

Postby LamboSE5 » 29 Jan 2012, 14:50

Thanks a lot for this write-up. It will help me. Haynes has no pictures, and as usual isn't completely clear on the procedure.

I'm swapping driver (maybe passenger) seat(s) from a 1998 S70 T5 into another 1998 S70 T5. The only thing I'm worried about is having an SRS light on in the new T5 - I don't want that...

In the message on volvoforums where 'rspi" put a link to this tutorial, he said that the 850's and 960's have an "airbag trigger protector", which is that red 'lockout key' depicted in this writeup.
Now, In my Haynes Manual (which is for S70, V70, and C70) it mentions there is a red pin or something like that in order to avoid the same problem...I don't have the Haynes with me right now.

...So my question is; IS there something similar I have to do in regards to my S70 T5 when I swap these seats? Picture?

Again - thanks. Good Job
1998 S70 SE5. 200,000Kms
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Re: S70 / V70 front seat swap to 850

Postby turbozutek » 30 Jan 2012, 11:13

I'm a wee bit confused about the "Driver seatbelt bracket" - why bother swapping those parts? It looks a lot like you removed the rivet and then swapped in parts that were identical? Why not just leave the original V70 one in place and bolt the 850 seatbelt through it?

Chris...
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Re: S70 / V70 front seat swap to 850

Postby zrtyler » 07 Feb 2012, 22:16

Just sucessfully did this swap from a 98 V70 AWD I found at the junkyard to my 95 850 GLT.

Instead of a chisel I used a sawz-all with a metal blade attachment.

All the electronics and everything hooked right up, no splicing needed on my model.


Great write up and thanks for the hint on cutting the rivet! might have taken me longer if not for this post.
:D :D :D
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