(T) Lambda Sensors

Looking at new Lambda sensor on a 1994 899 Cinq.
Has anyone had any issues/experience with NGK Lambdas or other non-OEM makes?

Sorry, given them up for lent.

Seriously, its normally poor wiring that lets down an aftermarket sensor.

Cheers

D

Have there been any issues with different resistance heaters in the Lambda sensors?
For example, recent Alfas have issues with NGK Lambda sensors, which seam to have a heater resistance of 4ohms verses the 8ohms of the OEM Bosch Lambda.

The Cinq obviously has a much earlier ECU design and may not be so bothered about such issues.

recent alfas use 6 wire sensors & a larger voltage switching range...still have enormous problems with the connections on them though

i have used the non-oem lambda ensor before, one lasted 1 year and 1 lasted 9 months ~~

Not good at all, i would much pay the 50 quid and get a oem one.

Not just the very late Alfas. The early 156 for example which just has one single 4-wire Lambda sensor, doesn't like the 4ohm NGK sensors at all.


The very late 156 with sensors in the manifold have issues with poor connector design.

Alfa dealer should be well aware of this issue & its modification.

Yes I know about that.

But back to Cinq Lambda sensors...


ycminq, what make were the Lambda sensors you had problems with?

ebay , 20 quid posted type .... i.e. the cheapest one u can find there .

David gave me his old bosch one and it ran perfect !!!

after a little thought, a more appropriate answer would be get a lambda sensor that gives u connector to the ecu to the lambda sensor, don't get ones where you need put together yourself. So the NGK and the BOSCH should be fine.

Hope this isn't too off topic - I'm planning to use an extended cable for a post-cat lambda sensor on an MPi Seicento when I change my exhaust.

FIAT seem to supply NTK (not NGK?) & the OEM part was NTK too, anyone know if there are any differences other than length between the varying 4 wire sensors used on different FIAT models?

I'm asking 'cos there seem to be a lot of different options available on Ebay that are OEM branded (NTK) with a proper plug, not just self assembly & obviously the length won't be an issue to me as I'll be needing to extend it anyway?

I just paid over £70 at my local dealer to replace one & the MPi Sei has 2 sensors so if I can get away with £25 or less for the other I'll be well chuffed!!!

EDIT: After re-re-re-reading this I've realised that the resistance of the heater is an issue, wonder if this means that mine has a resistance of 4Ohms not 8 like the Bosch?

If the white wires are the heater connections, the black=signal & grey=earth - Does it matter which way round the heater wires are connected?

NTK and NGK both the same, www.ngkntk.co.uk

I have used [still using] a universal lambda from ebay, I think it was about £30, as my original failed. They dont come with a connector so you have to make sure that the wires are joined 100%, you cant use solder as they are [I think] stainless steel wires, whatever they are made from, they are bloody hard to cut!!

From the minute I started my car after fitting, it has been great in that dept, by the mid summer it will be a year old, so perhaps too early to say how it will be then.

I suppose, that if there is a problem elsewhere, it can make a new sensor fail if the wrong type of emissions go past it!!

Mine failed due to silicon in the fuel.