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by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: Jul 2013
Posts: 3,732 Likes: 79
Talk Morgan Addict
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Talk Morgan Addict
Joined: Jul 2013
Posts: 3,732 Likes: 79 |
Glad it's fixed, can't beat an Italian tune up 
Red Leader 
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Joined: Mar 2013
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Has a lot to Say!
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OP
Has a lot to Say!
Joined: Mar 2013
Posts: 1,016 Likes: 2 |
As a post-script to this, my new Bosch Lambdas are now installed - a bit fiddly to use their universal connector to rejoin the OEM harness plug to the wiring for the new sensor - and the car is running better than ever now. It always frustrates me that components wear with a slow decline such that you never really notice until they finally give out and they are replaced. Clearly this original O2 sensors had been sub-optimal for a while, as the car is utterly brilliant again now and the old O2’s are now consigned to the bin. That’s 85 GBP very well spent as far as I am concerned and I think something that everyone should consider when their engines begin to do weird things....
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Joined: Aug 2013
Posts: 1,562
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Aug 2013
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Joined: Jun 2012
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Talk Morgan Expert
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Talk Morgan Expert
Joined: Jun 2012
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They are in the Alternative Parts List that is on a sticky at the top of this forum. ( Bosch p/n 0258986615. LS615. 4 wire)
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Joined: Mar 2014
Posts: 1,738 Likes: 56
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Mar 2014
Posts: 1,738 Likes: 56 |
As a post-script to this, my new Bosch Lambdas are now installed - a bit fiddly to use their universal connector to rejoin the OEM harness plug to the wiring for the new sensor - and the car is running better than ever now. It always frustrates me that components wear with a slow decline such that you never really notice until they finally give out and they are replaced. Clearly this original O2 sensors had been sub-optimal for a while, as the car is utterly brilliant again now and the old O2’s are now consigned to the bin. That’s 85 GBP very well spent as far as I am concerned and I think something that everyone should consider when their engines begin to do weird things.... Thanks to this thread I too have replaced my Lambda sensors (on my 2012 car) and having now been on a fairly long test drive, I am relieved to report that my intermittent (fluffy) misfire seems to have been cured. It was the type of misfire on low throttle opening/steady speed motoring with enthusiastic acceleration being absolutely fine. ![[Linked Image]](https://www.tm-img.com/images/2022/05/08/Lambda.jpg) My old sensors on the left and one of the new ones on the right. I can't spot any obvious problem with the old ones but I guess something was on the way out. As R1NGA says, £85 very well spent!
Andy
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Joined: Aug 2013
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Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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Posts: 1,562 |
Is that a simple plug / socket on top of the sensor for the cable to connect ?
Thanks
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Joined: Mar 2014
Posts: 1,738 Likes: 56
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Mar 2014
Posts: 1,738 Likes: 56 |
Is that a simple plug / socket on top of the sensor for the cable to connect ?
Thanks
No, not that simple. You need to cut the existing plug off the old sensor and splice the new sensor to it using a connecting block supplied with the kit. A bit fiddly actually. I guess you could always buy the sensor assembly direct from MMC which would be a plug & play solution but quite costly I imagine (if they are even available).
Andy
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Joined: Aug 2013
Posts: 1,562
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Aug 2013
Posts: 1,562 |
Is that a simple plug / socket on top of the sensor for the cable to connect ?
Thanks
No, not that simple. You need to cut the existing plug off the old sensor and splice the new sensor to it using a connecting block supplied with the kit. A bit fiddly actually. I guess you could always buy the sensor assembly direct from MMC which would be a plug & play solution but quite costly I imagine (if they are even available). Thanks Bunny. If it was straight forward I would just do it, but I think I will wait for symptoms of failure first. I dont get on with connectors !
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