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ybl405



Member Since: 30 May 2024
Location: London
Posts: 7

United Kingdom 2017 Range Rover Vogue TDV6 Barolo Black
Best alternator brand for L405 2017 3.0 diesel

Hi folks

Battery was flat after a month abroad.

AA chap said my battery is healthy but told me my alternator was playing up based on his tests.

Might also explain the intermittent HDC fault/service light that pops up 20% of the time .

Any advice on the best brand alternator?

thanks

Post #693623 30th May 2024 12:14pm
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MikeO



Member Since: 02 Jan 2018
Location: The Cotswolds
Posts: 516

Scotland 2009 Range Rover Vogue TDV8 Buckingham Blue

Denso is OEM I think and recommended. 2016 Skoda Octavia VRS Estate
<gone>2009 FF Vogue TDV8 Buckingham Blue</gone>
<gone>2015 BMW 520D SE (not my favourite car)</gone>
<gone>2009 D3 HSE Galway Green</gone>

Post #693636 30th May 2024 2:36pm
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JDGeorgia



Member Since: 11 Oct 2023
Location: Atlanta GA
Posts: 148

United States 2006 Range Rover HSE 4.4 V8 Buckingham Blue
Re: Best alternator brand for L405 2017 3.0 diesel

ybl405 wrote:

AA chap said my battery is healthy but told me my alternator was playing up based on his tests.
Might also explain the intermittent HDC fault/service light that pops up 20% of the time .


If you are getting HDC Faults and the battery is not charging - Please, please, please check your ground/earth straps. The alternator may be fine or a bit stressed because of a bad 'earth'. The Earth points live behind the front wheel arch liners and if you are in a climate that uses salt on the roads... they will get eaten alive.

This is my L322 - but a similar issue. I went through 3 starters and 2 alternators in 6 months along with random cascading faults. My Indy said they would not replace a 4th starter under warranty - because my drivetrain was not grounded to the body/battery. I ran a ground lead from an old Jeep project from the lug under the bonnet down to a mounting bolt on the starter. The alternator produces the most current - the starter requires the most. My current battery says production date of 10/18 and same starter/alternator for 6 years. Also got rid of the random cascading faults.
These things have a million sensors and they all work off of a 'signal voltage' - if the signal is wrong - faults start cascading...
Click image to enlarge


You can have all the juice in the world, but if the circuit is not complete... it will do no good.

Best of luck with it - JDW 2006 L322 HSE LUX 4.4NA Jag V8 Buckingham Blue/Ivory - 'Col Reb'
Rolled Yahtzee Aug 2023 222,222Miles
2016 L405 HSE TD6. Santorini Black over Almond. - 'Donna the Diesel'
Only L405 IN THE KNOWN UNIVERSE with an L494 Shift Lever Fitted!
97K at purchase Sept of 2023

Post #694217 10th Jun 2024 3:57pm
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