EU6 DPF Problems Model by Model

[DisillusionedSport]

It transpires that a technical notice was sent out to JLR's dealers and National Sales Offices around 18 months ago which summarised the position on EU6 DPF performance for each chassis type. The letter confirms that Evoque, DS and E-Pace diesels are particularly susceptible to problems stemming from insufficient heat in the exhaust, being caused by the lack of a "close-coupled" exhaust architecture where key components are spaced too far back from the engine.

It was widely believed that the D8 exhaust architecture was to blame for higher than normal diesel dilution, shortened service intervals and an assortment of other DPF and EGR faults, following the leaking of a service compliance notification (JLRP00100) two years ago. The latest document confirms this interpretation was correct, and that engineering "challenges" resulted in some diesel cars that were unsuitable for "urban" and "rural" journey patterns. Sales staff were told to identify unsuitable driving styles in the pre-sale qualification process and point these potential customers at petrol-engined cars or, where petrol wasn't available, at different JLR models.

Most customers experiencing unexpected oil dilution and DPF problems with Evoque and DS Ingenium diesels are familiar with the standard dealership responses: "your car is performing normally" and "your driving style is to blame." But it transpires that JLR dealerships knew something that they should have made customers aware of before they bought certain JLR diesel SUVs. The technical letter states that people thinking about an Evoque, Disco Sport or E-Pace diesel should have been asked about their driving style BEFORE sale, not AFTER their cars started to go wrong. It might be much easier now to prove that misbehaving cars were "not of satisfactory quality", "not fit for purpose" or "not as described" instead of it being automatically a case of, "No, the car's fine, Madam, you are just not driving it correctly".

JLRP00100 - https://www.discosportforums.co.uk/download/file.p...

Letter - https://www.discosportforums.co.uk/download/file.p...

Thanks are due to the RRS and DS forums for locating and hosting the files.

[smudger911]

Thank you for taking the time to collate the information and post the relevant headlines / latest info..

I know of several Evoque and DS owners who are choosing to ignore the early service warnings (oil dilution), one chooses to ignore the warnings and carries on driving, the others reset the oil service indicator for another 10,000 miles. I suspect there will be a good number of these vehicles coming to market post their lease / pcp deals with iffy turbos and soon to-be knackered engines due to diluted oil / oil starvation.

[DisillusionedSport]

Another issue on DS and Evoque is steering bolts shearing due to salt corrosion, which apparently kills the power steering. JLR refused to issue a voluntary recall in the UK, presumably because it would be far too expensive to repair across the fleet (somebody suggested 3 grand a pop because the steering column has to come out). In Canada there's a mandatory recall for the same issue.

Nice cars to own when they don't go wrong but DPFs, balancer shafts, turbos, EGR valves and/or coolers have all been reported multiple times and none of these items is what you would call cheap.

[DisillusionedSport]

Link below finds a detailed guide to the diesel dilution and DPF clogging issue specific to D8 chassis cars. Uses layman's language to explain "hardware and architecture differences between model lines" with diagrams of the different systems and links to official scientific papers confirming that SCRF catalysts don't regenerate properly, even in the controlled conditions of a laboratory. This system was never going to work which is presumably why they decided to increase diesel dilution to 10%.

https://www.dropbox.com/s/d0bcrd7sve4l598/D8%20Dil...