Discovery 2017

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  • Villager
    Member Since: 16 Jun 2023
    Location: Blackburn
    Posts: 2
    United Kingdom 

    Most Reliable Engine

    Hi all,

    Long time D4 owner here (I'm on my third) thinking of switching to an early D5 but worried about tales of catastrophic engine failure. Sounds like both the 2 and 3 litre diesels can go pop even at low mileage. I suppose my question is are the petrol engines any more reliable? I don't do huge miles so could live with the lower mpg if it meant I was less likely to have a 5 figure bill.

    TIA

    Dean
  • JonM
    Member Since: 30 Jun 2016
    Location: North Yorkshire
    Posts: 598
    United Kingdom 
    2022 Discovery SDV6 HSE Carpathian Grey

    I've seen very few reports of problems with the petrol engines, but there are very few D5s running on petrol so is the lack of problems due to the rarity rather than reliability?

    MY2022 D5 HSE D300 - with extra nice bits added
    MY2019 D5 HSE 3.0 SDV6 - sold to a dealer for a crazy price!
  • 747_JK
    Member Since: 26 Jun 2018
    Location: England
    Posts: 412
    United Kingdom 
    2022 Discovery SDV6 HSE Lux Santorini Black

    Had my D5 3.0litre diesel for 4 years and 9 months, 50,500 miles, and not a single mechanical issue in all that time, bar a battery which needed replacing after 3 1/2 years. Engine has always purred very smoothly. But I wouldn't think of owning one without an extended warranty...

    Hope I've not blown my luck for the last week of ownership now.....

    As for engine issues, I was plagued with them with my first 2010 D4. Engine failed in first year of ownership and both engines smoked so badly on start-up that it became quite a well known car over on the Disco4 website. And as LR wouldn't fix it, I ran it with stickers in the rear window apologising to other road users and blaming LR. Them were the days!

    https://www.disco4.com/forum/is-problem-wi...55820.html

    MY23.5 D5 3.0 MHEV Metropolitan Edition – Santorini Black – Ebony Windsor Leather – 21” Style 5025 gloss black wheels – 21” full size spare tyre – Black roof rails – Black side mouldings - Williams Ceramic Coat. [Gone: D5 HSE @ 50,795miles: (now LH68 BYW)]
  • DieselRanger
    Member Since: 12 Oct 2017
    Location: God's Country, Colorado
    Posts: 768
    United States 
    2017 Discovery Td6 HSE Silicon Silver

    Lots of the Si6 engines here in the US - exact inverse of the sales in UK/EU. That engine has been around a long time here in multiple JLR vehicles and seems to do very well.

    My 2017 Td6 (the single-turbo VVT Lion engine, not the twin-scroll SDV6 - we never got that here) has had absolutely zero issues in nearly 75,000 miles with hard off-roading, long road trips, mountainous roads, and very high altitude (>6,000 ft elevation up to nearly 13,000 feet). When I talk with my local service center, they echo that these two engines have been the best they've ever seen from Land Rover.
  • Aldo
    Member Since: 23 Jul 2019
    Location: Cheshire
    Posts: 119
    United Kingdom 

    I’d say the risk of a 3.0 D5 is no worse than a D4, both can suffer crank issues, initially more reported on the D4’s which I guess are depleting as owners upgrade or the D4’s come to the end of their trusty lives.
  • discus
    Member Since: 22 Aug 2019
    Location: North
    Posts: 160
    United Kingdom 

    The SDV6 is a great engine in the D5. Mine hasn't had an issue in all the years I have owned it. As far as I am aware, Land Rover usually steps in with goodwill to fund the new engine if you are in the small minority that have a crank issue, but I don't know at what age/mileage/number of owners that stops happening.
  • Popsdosh
    Member Since: 06 Nov 2021
    Location: Cambs
    Posts: 138
    United Kingdom 

    Aldo wrote:
    I’d say the risk of a 3.0 D5 is no worse than a D4, both can suffer crank issues, initially more reported on the D4’s which I guess are depleting as owners upgrade or the D4’s come to the end of their trusty lives.

    Exactly the same engine in a pre ingenium D5 as a D4 so I think its still a potential longer term issue as they get older. Oddly enough Ford now using the Lion again however with a redesigned crank. Which was not made available to JLR. Still plenty of D4 giving up and being a significant end of life reason.


    Last edited by Popsdosh on 26th Jun 2023 6:17 am. Edited 1 time in total
  • Popsdosh
    Member Since: 06 Nov 2021
    Location: Cambs
    Posts: 138
    United Kingdom 

    discus wrote:
    The SDV6 is a great engine in the D5. Mine hasn't had an issue in all the years I have owned it. As far as I am aware, Land Rover usually steps in with goodwill to fund the new engine if you are in the small minority that have a crank issue, but I don't know at what age/mileage/number of owners that stops happening.
    Up to 7 years with D4 with a full JLR service history and help from the dealer dealing with CS .
  • Ian_S
    Member Since: 18 May 2021
    Location: South
    Posts: 89
    United Kingdom 

    Popsdosh wrote:
    Exactly the same engine in a pre ingenium D5 as a D4 so I think its still a potential longer term issue as they get older. Oddly enough Ford now using the Lion again however with a redesigned crank. Which was not made available to JLR. Still plenty of D4 giving up and being a significant end of life reason.
    People have claimed, without any evidence, that later production of the JLR engines did get a better crank. However I think this was after D5 started. You'd like to think it might have come with the increase in HP when the MY2019 was introduced with the SDV6 engine, and it went from 250 to 300 bhp. Would certainly be nice to know for definite.
  • Villager
    Member Since: 16 Jun 2023
    Location: Blackburn
    Posts: 2
    United Kingdom 

    Thanks all.

    What's the lowest replacement engine cost one could expect, if using an independent rather than a main dealer?
  • nebc100
    Member Since: 08 Mar 2019
    Location: Altlinster
    Posts: 408
    Luxembourg 
    2018 Discovery Td6 HSE Lux Namib Orange

    Just wanted to make a small comment…

    The D5 engine is not QUITE the same as the D4 engine.

    There are differences in the EGR and exhaust systems… and possible small other differences.
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