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  I'm thinking of replacing my Honda Legend with a Toyota Prius - but how long will the Prius' batteries last? 8 Nov 2010 (Ask HJ)
  I own two Honda cars which, at 18 years old, are now coming to the end of their economic lives. So I now need a new or secondhand car to replace one of...
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  Can I reverse the emissions fix by disconnecting the battery? 19 Apr 2017 (Ask HJ)
  My SEAT had the "fix", which has ruined the performance and fuel consumption and will likely lead to EGR failure in the future. Can I reset it by disconnecting...
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  Will the battery go flat if I stow away my MG GS for a month? 22 Feb 2017 (Ask HJ)
  Will my MG GS be okay being stowed away for a month or will the battery go flat and will I lose the radio code?
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  What's causing mu car to screech at start up? 22 Oct 2013 (Ask HJ)
  My Nissan X-Trail makes an awful screeching noise when it starts up, yet rights itself once I get moving. Can you tell me what’s going on?
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  How should I change the battery on a modern car? 21 Apr 2012 (Ask HJ)
  Can you please provide me with appropriate advice and guidance on what precautions are advised and methodology applied when replacing the battery on modern...
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  How do 'green' electric cars generate heat for their occupants? 6 Dec 2010 (Ask HJ)
  Another aspect of heating battery driven cars (apart from battery capacity mentioned in your column) is that it is energy that would have to be generated...
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  Can a MHEV be left for a month without starting ? 15 Apr 2024 (Ask HJ)
  I have a BMW X3 MHEV Hybrid, 2021 model. I am planning to be away for 4 weeks. Is it okay to leave it on the drive unused for 4 weeks? Will it drain the...
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  What do I need to do to my car if leaving it parked for six weeks? 29 Jul 2023 (Ask HJ)
  I have a Volkswagen Golf 2.0 TDI and will be going abroad for between 4 to 6 weeks with my car parked on my driveway. No one else will be in the home when...
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  What is a good trickle charger to use during the winter? 15 Jul 2023 (Ask HJ)
  Can you please suggest a trickle charger for winter use which can remain connected to the starter battery of my 2013 2.2 TDCi Ford Transit Custom?
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  Can I buy a solar panel tricker charger for a Toyota eCVT? 10 Oct 2022 (Ask HJ)
  My mother-in-law is 82 and every other week her hybrid Toyota e-CVT is going flat in the Autumn. Yes, maybe a new battery is in order (it's coming up...
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  Will the repeated use of rapid chargers damage an EV battery in the long term? 31 Jan 2020 (Ask HJ)
  For EV owners who do not have off-street home charging and are thus forced to use public EV charging, will repeated use of high Kw rapid chargers damage...
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  Battery light on Ford Focus dash 3 Jun 2015 (Ask HJ)
  The battery light has come on my dashboard, then when driving the car the handbrake light also came on (obviously the handbrake is off), then the odometer...
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  Why does my daughter's Ibiza refuse to start? 13 Feb 2014 (Ask HJ)
  My daughter's car often won't start because the battery is flat. She does a few short town-based journeys each week, and a monthly motorway trip home....
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  Problem starting after being left for a few days 6 Jan 2013 (Ask HJ)
  After seven days of not using my car (normally its used daily), it wouldn't start today. Not only this, but there are no electrics, nothing! I opened...
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  Starting issues with an Audi A4 24 Mar 2012 (Ask HJ)
  I have an Audi A4 TDI 96 plate. I've had the battery and starter motor changed and still can't start it. When the key is in the ingition all the lights...
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  Do EVs generate heat from the batteries to warm the cabin? 31 Dec 2023 (Ask HJ)
  Maybe a bit of a strange question: I have a Smart ForFour EV and I notice it has a cooling system the same as a conventional petrol/diesel car. I guess...
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  Should I worry about the cost of battery replacement on a Tesla? 18 Jun 2020 (Ask HJ)
  I'm thinking of buying a Tesla but wonder if a PHEV would be more flexible on longer journeys. I'm also concerned about Tesla’s depreciation and cost of...
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  Hyundai i30 autostop 25 Jan 2014 (Ask HJ)
  I bought this car with 13,000 miles on the clock, 9 months after 1st registration. It has now done just over 15,000. It took me a little while to realise...
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  Are the new London buses with electric motors as green as they claim to be? 23 Nov 2013 (Ask HJ)
  Although you don't cover buses, I thought you may have some thoughts about the new double-decker London bus featured on a recent ‘Top Gear’ programme....
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  BMW 1 Series - No charge 21 Jan 2010 (Ask HJ)
  I have a 2008 BMW 118d owned from new with 30,000 miles. In the last few weeks the clock has lost the time three times, the low battery light has come...