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Import CAT requirements. VOSA information.

General chat on all things Mx/Roadster
Phil H
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Import CAT requirements. VOSA information.

Postby Phil H » Thu Sep 07, 2017 10:33 pm

This will probably refer to Eunos Roadster imports and I will keep this as brief as possible, but it may be of interest and use to some on here.

There always seems to be questions regarding the requirement of a catalyst on some MX-5's, typically early 90's and imports, well hopefully I have the answer as far as current legislation goes.

My 1993 V Spec broke down some time ago. It was recovered by the AA and when I investigated it turned out to be the CAT had collapsed/broken up internally and blocked the exhaust, subsequently stopping the car. I took the CAT off, hooked out all the bits and refitted the empty shell and the car was fine.

When it went for MOT it had an advisory that the CAT was not working, but it passed the emissions test OK. On the next MOT this year it was again advised that the CAT was not working but it still passed. I asked the tester if I could fit a De-Cat pipe and he said it was a bit of a "grey area" as the manual stated that if fitted the CAT should be in place even though it only needed a Basic Two Gas test and not a full CAT test.

I decided to contact the VOSA help department to see if I could get any information, but was not confident of getting a reply. However to my surprise, I received a reply the next day giving me the current information. I have copied the reply below so that it may help others on here, but basically 92 to 95 vehicles only require a CAT test if there is a VDS identifying number in the emissions data available to the tester. This is taken from the 4th to the 9th digits of the VIN number. To me it would appear that NA6C and NA8C which are import numbers are not listed so do not need a CAT even if originally fitted.

Anyway a copy of the VOSA reply to me is below and will let you all inwardly digest and come to your own conclusions. Hopefully this will be of help and give a definitive answer. By following the inserted links the VDS codes and test data can be accessed. Any MOT testers on here with a view?





Hi Philip



There is no confusion.



Spark ignition cars first used on or after 1 August 1992 are subject to a Basic Emissions Test (BET) regardless of whether a catalytic converter is fitted or required. In the event that the BET is failed, it becomes necessary to reference both the MOT Inspection Manual, Section 7.3 and the In Service Exhaust Emission Standards for Road Vehicles publication (Emissions book). The MOT Inspection Manual is available on-line at http://www.motinfo.gov.uk/htdocs/ and the Emissions book at https://www.gov.uk/government/uploads/s ... dition.pdf



For vehicles first used between 1 August 1992 and 31 July 1995, if there is an exact match for the vehicle in the Emissions book, then a full cat test must be carried out. Where this is the case, the vehicle must have a catalytic converter fitted or it will fail, regardless of the result of the emissions test.



If there is not an exact match in the Emissions book, then the vehicle will be subject to a non-cat emissions test (two gas test). Where this is the case, the vehicle is not required to have a catalytic converter fitted for MOT purposes, regardless of whether one was originally fitted.



I am unable to provide an answer specific to a particular vehicle as you have not provided any details of such. However, assuming you have the relevant Vehicle Identification Number (VIN), you can easily check for yourself using the link to the Emissions book and referencing page 70 of Section 1 (page 86 of the pdf). The Mazda VDS number is the 4th to 9th digits of the VIN.



Regards



Technical Standards Team|





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Re: Import CAT requirements. VOSA information.

Postby Speedy » Thu Sep 07, 2017 11:33 pm

:text-goodpost: :text-thankyouyellow:

I have also said to my Mot tester because an import has a NA6CE or NA8CE Vin No they do not qualify for a full cat test and he is happy with that.
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Re: Import CAT requirements. VOSA information.

Postby Mazda Mender » Thu Sep 07, 2017 11:51 pm

Thanks phil.
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Re: Import CAT requirements. VOSA information.

Postby storm » Fri Sep 08, 2017 12:06 am

Thanks for the help Phil. Will be getting my Eunos retested tomorrow and will point this out to the tester as he failed it on emissions (HC) even though it passed on the cat.

He insisted that all cars had the same test after august 92 (mine is December 92) but i have found that if the vehicle is not specified in the annex of the vosa document (link below) then the emissions levels are allowed to be higher till august 1995 models. This should allow my vehicle to pass. I don't blame the tester though, so many rules to remember.

Document available here
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/542070/in-service-exhaust-emission-standards-for-road-vehicles-18th-edition.pdf
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Re: Import CAT requirements. VOSA information

Postby storm » Fri Sep 08, 2017 11:25 am

Update.

Retook the test this morning, rest of the issues were fine (fog light switch, number plate, headlight beam height) but as my 1992 (J-reg) mk1 was imported in 1999 (according to the dvla V5) they were trying test the emissions on my eunos as a 1999 car.

Luckily i had the information this time to proove my car was an NA6CE (JDM import) and not an NA18B2/C2 (UK spec) car even though some genius at the dvla has put my car down as a mazda MX5 and not a Eunos roadster.

They spent a few minutes looking for my engine number but i just stepped in and explained my car is not stated in the Annex of the document (https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/542070/in-service-exhaust-emission-standards-for-road-vehicles-18th-edition.pdf) it must be tested as it is for all cars between 8/92 and 8/95 which means NO fast idle test (class is "data hot found"). To be honest it has to have a CO reading of .30 or below and mine was at .34 but that wasn't the point. Luckily a young tester spoke up and fought my case a bit,... butbtge main guy didn't like being proven wrong by some randon (now i know how Wayne feels). Its not like i was rude, i did it all with humility and a smile (usually gets you further in life).

Point is, 8/92 - 8/95 Imports like mine are EXEMPT from the fast idle tests and have to meet the standards set on page 10 & 11 of the document (link above) unless stated in the annex (current "mazda" starts on page 79).

Thank you Mazda Menders for tour help, a donation will be made shortly :handgestures-thumbup:

My car passed, the end.
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1. A car is only worth what someone is willing to pay for it, 2. Resale wont save your life in an accident, 3. Genius has limits, stupidity has none, 4. Never argue with an idiot, they will bring you down to their level & beat you with experience, 5. Growing old beats the alternative -- dying young!
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Re: Import CAT requirements. VOSA information.

Postby Nigsy » Fri Sep 08, 2017 1:28 pm

Thanks Phil. I used this same post off the OC forum, to get my '94 thru the test - just the other week.

Young lad said "you learn something every day".

Your post has saved me twice now. :text-thankyouyellow:
Phil H
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Re: Import CAT requirements. VOSA information.

Postby Phil H » Fri Sep 08, 2017 8:33 pm

Glad this has been of help. I went through it when I changed both my V5's to Eunos rather than MX5. It was back in about 2014, so I was a bit concerned it might of been out of date, but still seems ok though the MOTinfo link seems to have stopped working.

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