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D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again |
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Thread Tools | Display Modes |
#1
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2002 S8 o2 sensor
Chaps,
looking to replace the pre cat o2 sensors as I don't think they have ever been done I think its these https://www.autodoc.co.uk/bosch/1149541 anyone confirm 100%? thanks |
#2
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Looks like that's a generic 4-wire sensor so you have to splice the connector.
This one is the correct part cross referenced by the original number (077906265J), and is the same price. |
#3
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cheers MK
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#4
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well they arrived and look like the correct part but looks like you need the arms of Mr tickle and the hands of a newborn to get to them.
Anyone any tips or links to a guide for this job ? |
#5
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MJ is no doubt the expert on doing this, but it can be done by mere mortals as well. I did mine a couple of years ago, once I managed to find out where they were. Not sure of the correct procedure, but removed the driver side one from below. The passenger side I got to from above, but that resulted in some blood loss and bruising.
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2001 A8 D2 FL 3.7 Q - LPG Conversion, Engine: AKC, Gearbox:FBB, Colour:LY5X Aqua Blue pearl effect, Interior:WJ light beige/dark beige valcona leather with burr walnut inserts My DIY jobs - Replaced alarm horn, Replaced Coolant Temp sensor, Updated RNS-D firmware, Installed Reversing Camera and Digital TV, Dashcam Installation, Retrofitted Rear Blinds, Auto-Dimming Rear View Mirror, Chrome Boot Struts Sold! 2008 S8 D3 5.2 V10 - Engine: BSM, Gearbox:KLW, Colour:LY7F Suzuka Grey Pearl Effect, Interior:Black/Black with Silver/Black valcona leather with carbon atlas inserts, Bang & Olufsen, Heated windscreen, Soft-close doors, TV, DAB, AMI, Quad Zone, Auto Boot, Auto dim Mirrors, Keyless entry, PDC with rearview camera, AFS II Headlights My DIY jobs - Fan Jet Windscreen Washers, Retrofitted Electric Side Blinds |
#6
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Dropping the exhausts is probably the best solution, but it's a bit of a faf I would imagine.
If they're not generating codes, I'd be tempted to leave them. They are only used to check CAT efficiency and don't directly effect fueling in any way. The fronts are way more important.
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Cheers Marty ____________________ Current: 2001 Audi S8 - Brilliant Black with Black interior, C5 RS6 rims (whenever I actually put them on...), Solar Sunroof, Tinted side and rear glass, RNS-D, Grom, Bose, clunky old phone in arm rest! 2002 Audi S8 - Project Replacement head coming arrived thanks to MJ Silver with Black interior. All features as the '01, with the 'S' mode auto shifter. Dodgey rear tint (need to find a way to get rid of that). Family: 2009 Volvo XC90 V8 R Design - has a louder more obnoxious exhaust than the S8, sounds great! Love this thing - Q7 was double the price, and certainly not double the car! Sold: 1997 Audi A4 - Hamilton's Club Sport, Achat Grey (will miss the old girl) |
#7
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its the fronts we are talking about no?
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#8
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Sorry, my mistake!
The descriptions of the job made me think you were doing the rears! The fronts are quite doable. I did mine with an offset O2 socket from memory, with a couple of socket extensions. Definately fiddly, but I got to both from above. I think I only removed the engine cover and inlet pipe. I thought Bosch had stopped making the sensor with the correct plug, for a sensor with a generic plug and a new plug for the harness (seriously, Bosch?). Michaela would be replacing these quite often, so she should know. I ended up with NTK sensors on mine.
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Cheers Marty ____________________ Current: 2001 Audi S8 - Brilliant Black with Black interior, C5 RS6 rims (whenever I actually put them on...), Solar Sunroof, Tinted side and rear glass, RNS-D, Grom, Bose, clunky old phone in arm rest! 2002 Audi S8 - Project Replacement head coming arrived thanks to MJ Silver with Black interior. All features as the '01, with the 'S' mode auto shifter. Dodgey rear tint (need to find a way to get rid of that). Family: 2009 Volvo XC90 V8 R Design - has a louder more obnoxious exhaust than the S8, sounds great! Love this thing - Q7 was double the price, and certainly not double the car! Sold: 1997 Audi A4 - Hamilton's Club Sport, Achat Grey (will miss the old girl) Last edited by 27litres; 29th December 2018 at 08:54 PM. |
#9
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Would be smart if I replace those aswell when i have my engine out of the car
It sucks that I need 4 of those
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A8 d2 W12 swb |
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