Skip advert
Advertisement

Porsche 911 petrol engines subject of internal emissions cheat device investigation

Porsche has begun an internal investigation into possible emissions defeat devices fitted to petrol engines in the 911 and Panamera.

Porsche has opened up an internal investigation into alleged illegal software used in Porsche 911 and Panamera models built between 2008 and 2013. The investigation was proactively reported to Germany’s Federal Motor Transport Authority (KBA) by Porsche themselves and is ongoing. 

The illicit software is alleged to illegally switch exhaust filters depending on the internal engine modes, similar in execution to the devices found in diesel engines supplied to Porsche by Audi. If proven, this adds to the long list of illegal conduct that has been making headlines since the VW emissions scandal first blew up in September of 2016. 

Advertisement - Article continues below

Since then, numerous criminal investigations into emission cheat devices have been undertaken by authorities across the world, but this is one of only a few found in a petrol engine, not to mention one that’s being proactively investigated internally rather than covered up. In addition to Porsche’s internal investigation, the KBA has also started its own investigation into Porsche’s claim of internal misconduct. 

Porsche UK responded to the investigation stating: “Porsche is routinely and continuously reviewing technical and regulatory aspects of its vehicles. The company also conducts reviews of potential issues. This is an expression of a functioning system of internal control measures and our corporate culture. 

In such reviews, Porsche has identified topics that it has now – as in other instances – pro-actively brought to the attention of the regulators. These topics mainly relate to specific hardware and software used in certification testing. In certain cases such components may also have differed from parts used in series vehicles. 

Based on our current investigative results, these topics only relate to vehicles that were developed years ago. There is no evidence that vehicles from current production are affected.

Porsche is continuing its review and is coordinating closely with authorities.”

Skip advert
Advertisement

Recommended

Porsche tuner Ruf is back with a surprise 1000bhp B8 engine, and that’s not a typo
RUF boxer-eight
News

Porsche tuner Ruf is back with a surprise 1000bhp B8 engine, and that’s not a typo

Long-standing German Porsche tuner and manufacturer Ruf has announced a new boxer eight-cylinder engine, and it’s already up and running
9 Jul 2026
Best Porsches – from Boxster to Carrera GT, there's a Porsche for everyone
Best Porsches
Best cars

Best Porsches – from Boxster to Carrera GT, there's a Porsche for everyone

Not all the best Porsches are 911s and not all the best 911s are GT3s, though as you’re no doubt expecting, there are plenty of both peppering this li…
30 Apr 2026
Ex-Porsche man returns home after stint at Ferrari and McLaren
Michael Leiters
News

Ex-Porsche man returns home after stint at Ferrari and McLaren

Michael Leiters, the ex-McLaren CEO named as new boss of Porsche
17 Oct 2025
Skip advert
Advertisement

Most Popular

This 900bhp Lotus Emeya has Bugatti specs, but carrying passengers reveals a problem
Lotus Emeya
Opinion

This 900bhp Lotus Emeya has Bugatti specs, but carrying passengers reveals a problem

A well-engineered electric performance car can be an impressive thing to drive but carrying passengers is very different from a petrol-powered equival…
2 Oct 2026
Aston Martin DBX S review – beating the Ferrari Purosangue to the top of the class
Aston Martin DBX S front
Reviews

Aston Martin DBX S review – beating the Ferrari Purosangue to the top of the class

Lots of tweaks and upgrades inside and out keep Aston Martin's SUV at the top of its game in DBX S-form
2 Oct 2026
Kia EV4 GT review – a budget Hyundai Ioniq 5 N?
Kia EV4 GT
Reviews

Kia EV4 GT review – a budget Hyundai Ioniq 5 N?

Kia says the EV4 GT is its first ever hot hatch. It’s not the last word in engagement, but a practical daily with an enthusiast’s flair
1 Oct 2026