Currently reading: BMW raises CO2 figures for entire range
Increase in emissions is matched by a reduction in economy following WLTP testing
Sam Sheehan
2 mins read
20 March 2018

BMW has increased the CO2 outputs of its entire range following retesting with the new Worldwide Harmonised Light Vehicles Test Procedure (WLTP).

The largest increase in CO2 was seen with the BMW 520d SE Automatic, which is now rated at 119g/km, a growth of 17g/km – or a 14% jump compared with the previous New European Driving Cycle (NEDC) test results.

Every model has also seen a reduction in economy, with the aforementioned 520d variant falling from 72.4mpg to 62.7mpg. The figure changes to this model will enforce a 3% rise in tax for company car drivers.

Even cars at the entry-level have been affected, with the 116d SE rising from 94g/km of CO2 and 78.5mpg to 111g/km and 67.3mpg respectively. The 116d SE Automatic now produces 116g/km and 64.2mpg, up from 99g/km and 74.3mpg.

BMW said that the number adjustments are attributed to the WLTP tests, which are widely regarded as being considerably more stringent than the outgoing NEDC process due to the incorporation of more accurate real-world driving scenarios.

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Prior to the WLTP’s introduction in September 2017, it was estimated that CO2 emissions would increase by up to 15% showing that BMW’s largest jumps place it towards the maximum expected changes.

BMW drew no links to its recent recall of 11,700 vehicles, which was due to an internal investigation that found its cars were producing higher emissions in real-world driving than lab tests. In an official statement released in February, BMW said engineers noticed “that correctly programmed software was wrongly used in a few models that were not compatible”.

Although the company informed authorities of its findings, no prosecutions have followed at this stage. Germany’s Federal Motor Transport Authority (KBA) said that it didn’t consider the software used in affected models to be a ‘defeat device’.

BMW has already confirmed that it will halt the F80 M3 this August because it will require a new particulate filter to pass WLTP tests, something a spokesman told Autocar wouldn’t be financially viable for a model so far into its production life-cycle

BMW has also slightly raised prices across its range. A spokesman said that the changes are routine.

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20 March 2018

  Theirs a surprise NOT!, almost all Cars never match the quoted mpg, I usually deduct 20%, gives a more realistic attainable figure.


21 March 2018

...exactly Peter no surprise.

I cant understand why posters here are getting so het-up about this.

If you have benefitted from a lower tax bracket due to unrealistic figures - Happy Days!

Anyone who has ever taken these NEDC figures literally is a fool, and I suspect many are just making a meal of this to look outraged and 'shocked' as one poster wrote.

Clearly NEDC figures could never be realistic since they were NOT real world figures and measured in the laboratory (not even a head wind to punch against!!)....a test that is frankly impossible anyway since everyone drives differently and experiences differing driving conditions.

I dont know what everyone expects given that the rules for testing were concocted by a bunch of Euro beaurocrats who know nothing about anything.

No. the NEDC numbers were purely useful as a benchmark to measure cars against each other given that they were all tested in the same way....NOT to be taken literally.

If the EU creates a flawed system, it opens itself to be taken advantage of by clever engineers. Just in the same way as accountants find legal loopholes in tax regimes.

There are a lot of very smart people out there and a lot of dim witted losers working within governing bodies - not least the EU.

I said a year ago when all the indignant masses jumped on the VW bandwagon, not to be too hasty, as it was likely that all brands were culpable....and so it has ben seen....just that some brands have managed to keep relatively below the radar by making largesse offers and declarations to the regulators.

I dont think this will result in a greater tax bill as I dont think our government will have the where withall to back date this. You would only pay more tax if you were daft enough to buy the same vehicle again.

All in all a bit of a non-event.

20 March 2018

You state the 520D has the biggest increase, of 17g/km or 14%increase, then mention the 116D with the same 17g/km increase, which is 18% increase.


Pedantry maybe, but when talking numbers, with corresponding impact on company car tax, the numbers matter.

20 March 2018

Bread and butter 520D now officially10mpg worse than before.. 

I cant wait for the VW group figures.. 

20 March 2018
Surely it's time for the government to act. This represents tax fraud on a massive scale. These cheats and the dieselgate scandal have cheated the UK exchequer out of hundreds of millions of pounds and the UK consumer has been deceived to the tune of thousands of pounds each.

Why isn't the UK government following the lead of other countries in suing the motor manufacturers?

20 March 2018
Perhaps even more shocking still is the likelihood that even these figures are optimistic at the best of times.

20 March 2018

Where is their mea culpa?

20 March 2018

VW has just raise the CO2 and lowered the mpg figures of its Caravelle, Shuttle and California. They stopped all deliveries of them since December and can only now by ordered again. Some of them will now carry an extra £300.- in VED.

20 March 2018
thesecretdriver wrote:

VW has just raise the CO2 and lowered the mpg figures of its Caravelle, Shuttle and California. They stopped all deliveries of them since December and can only now by ordered again. Some of them will now carry an extra £300.- in VED.


Exactly the same vehicle, but the customer pays more tax. What larks!

20 March 2018

According to BMWs own website those new values are not WLTP values though. They are NEDC values backwards calculated from WLTP through an EU tool called CO2MPAS.

Based of an EU paper released late last year the WLTP CO2 values for the 520d SE Auto could be anywhere up to 143g.

BMW website: The values for fuel consumption, CO2 emissions and energy consumption shown were determined in a standardised test cycle according to the European Regulation (EC) 715/2007 in the version currently applicable

715/2007 is the old NEDC legislation......


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