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  #1  
Old 12th February 2020, 01:25 PM
Versace Versace is offline
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Default Oxygen sensors

As my car has a lot of miles, with everything I´m replacing, I will replace the PRE-CAT Oxygen sensors as well.
Which ones to buy? Bosch?
Do I have to make some adaptations after the replacement? I´ve read about some "readiness codes"...
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  #2  
Old 25th February 2020, 05:51 PM
IT D3 IT D3 is offline
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I think the Bosch ones are OE but i'm not 100% sure on that. However they are a good quality replacement so you should be fine.

Probe Lambda Sensor BOSCH 0258007351 is the one you want.

I think fitment is quite involved so do report back on how much it costs to install them - it will help others.
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Old 1st March 2020, 07:14 AM
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I don't think Bosch make the plug and play ones anymore - or at least I couldn't find them.
The suggested replacement has a different plug with an adapter to modify the factory plug from what I recall.

NTK (NGK's brand in the case of O2 sensors) make a direct plug and play version that I have used without any problems on my S8 for around 5 years now.
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Old 1st March 2020, 08:02 AM
snapdragon snapdragon is offline
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https://www.autodoc.co.uk/spares-sea...ord=0258007351
The Hella one looks good value.
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Old 1st March 2020, 08:11 AM
MikkiJayne MikkiJayne is offline
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Quote:
Originally Posted by IT D3 View Post
I think fitment is quite involved so do report back on how much it costs to install them - it will help others.
The inlet manifold has to come out
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Old 1st March 2020, 11:08 PM
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Sorry - I was thinking D2 O2 sensors.
Just realised this is posted in the D3 engine section...

Is BFM 4.2 an inlet manifold out job for the O2 sensors?
A bit silly, they're pretty much a service item!
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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; 2nd March 2020 at 12:48 AM.
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Old 2nd March 2020, 08:26 AM
MikkiJayne MikkiJayne is offline
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Quote:
Originally Posted by 27litres View Post

Is BFM 4.2 an inlet manifold out job for the O2 sensors?
A bit silly, they're pretty much a service item!
One of them is. I seem to remember the engine has to come out for the other side. Two of the many reasons I don't work on D3s
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Old 2nd March 2020, 01:44 PM
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Inlet manifold out for the N/S pre cat sensor (in a RH Drive car)
and the LH (Drivers) Side one isnt accessible and requires engine out
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20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble
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Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble
Audi A8L D2 4.2 Petrol with LPG - Ebony Black
Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black
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Old 6th March 2020, 07:46 AM
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Quote:
Originally Posted by Architex_mA8tey View Post
Inlet manifold out for the N/S pre cat sensor (in a RH Drive car)
and the LH (Drivers) Side one isnt accessible and requires engine out
Which Engineer got a promotion for that idiocy?

...If I ever buy a D3, it will have 2 more cylinders (And probably 2 x the problems!)
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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)
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  #10  
Old 10th March 2020, 08:49 AM
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Quote:
Originally Posted by 27litres View Post
Which Engineer got a promotion for that idiocy?

...If I ever buy a D3, it will have 2 more cylinders (And probably 2 x the problems!)
I should imagine once the German engineer realised his error he offered himself for sacrifice!
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Confidence is the feeling you have before you know better . . . .
Audi A8 D2 3.7 Quattro Sport 1999 FL - Melange
2nd Place Winner - A8-Freunde Annual German Meet 2012 at Edersee
20" x 9" Bentley GTC Wheels with 385mm W12 Front Discs & Bentley Caliper Covers, Front Lowered on Coilovers, Xenons, Combined DRLs and LED Foglights to modified OEM front fog lamp position, Alcantara/Leather, Full Black Alcantara headlining + pillars and blind shelf, Bespoke Flat Bottomed Sports Steering Wheel, Dark Myrtle Wood, Autodim Mirrors, Bose, Blinds, Digital TV, Ski Hatch, Modified rear exhaust section for extra V8 Burble
Audi S8 D2 Final Edition 2002, Avus Silver with Red Leather Interior
Tiptronic with Sport mode button, Sony rear entertainment package, Bose sound system, Audi Navigation Plus, 20 inch Final Edition alloys, Full Cat Back Stainless Milltek exhaust, giving a great V8 burble
Audi A8L D2 4.2 Petrol with LPG - Ebony Black
Audi A8L D4 FL 4.0T Petrol twin turbo - Havana Black
Audi A2 1.6 FSi Sport - Dolphin Grey with Votex body kit and Red Leather Interior
and some other A8's A8L's and Mercs
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