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Honda Jazz Mk4 2020 - / Windscreen mould!
« Last post by Nicksey on Today at 12:40:36 PM »
Anyone else seeing a mould develop along the bottom edge of the windscreen, just under the glass?

After 8 months of ownership from new, I had to have the windscreen replaced due to delamination (our dealer had replaced 2 others for the same reason)... and now I am seeing mould 16 months later!

Always clean using Autoglym products, and quality screen wash products.
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Honda Jazz Mk4 2020 - / Re: Bad omen?
« Last post by ahavoja on Today at 10:05:13 AM »
I think that theoretically, if the HV battery's capacity drops to half, then the petrol engine would just run half shorter time to charge it, and the car would remain in EV mode half shorter period of time, until the engine starts charging the HV battery again.

But as battery gets older, its internal resistance increases as well. Higher internal resistance means that the battery heats up more, both when it is charged and when it is discharged. This will cause an efficiency drop. Basically the car puts more electrical energy into the battery while charging, but the battery doesn't give as much energy out while the battery is discharging, for example when accelerating.
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Honda Jazz Mk4 2020 - / Re: Bad omen?
« Last post by Benny Ng on February 15, 2025, 11:55:48 PM »
My understanding is that many folks prefer to lease their cars nowadays (even on this forum).

So (now playing the devil's advocate here): Why on earth would they ever be concerned about how well any car ages above the lease time?

I have never leased a car in my life (and don't intend to do so, ever!). Yet, I have bought a e:HEV Jazz with the firm conviction of "doing the right thing"!

For the record: The Jazz's HV battery holds a meagre 0,7 kWh and simply serves as a buffer in the car's propulsion system.
So, should the HV battery eventually degrade to 80% of its original capacity would simply mean that the average consumption would go down by a few MPG (or up by 0.x L/100km).
This isn't an "earth-shattering event" that would render the car completely worthless!

Please, let us keep some perspective here, thank you.


Jazz’s battery is 0.86kWh.
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Honda Jazz Mk2 2008-2015 / Re: Front and rear windscreen washers not working
« Last post by BobJazz on February 15, 2025, 09:02:41 PM »
Good evening all,
I know it's been a while and apologies for not updating the forum.
In the end, it turned out to be a malfunctioning washer pump. Replaced by an indie garage for £115 (£75 for the pump, £35 for the labour).
Unfortunately the bill at the mechanic turned out to be quite high as they found the off side front road spring and anti-roll bar link needed replacing too...
Thanks for the help!
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Honda Jazz Mk2 2008-2015 / Re: Advice needed! Cylinder 3 spark plug hole dethreaded
« Last post by take5 on February 15, 2025, 08:46:29 PM »
enjoyed the video - very informative from what appears to be a very decent mechanic.
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Honda Jazz Mk2 2008-2015 / Re: Advice needed! Cylinder 3 spark plug hole dethreaded
« Last post by pebbles on February 15, 2025, 06:34:28 PM »
There are a couple of YouTube videos showing what's involved in sorting a stripped out plug hole thread on the Jazz , or Fit as it's called in the States.

Apparently it's a common problem on around 2010 models especially in the States due to the higher mileages.

Also I think the Time-cert is more common in the States than a Helicoil insert.

It's a bit of a mare job that's for sure , but doable



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Off Topic (Non-Honda) / NOCO Jump Starters - On Offer @ Amazon
« Last post by ninanina on February 15, 2025, 05:53:48 PM »
Amazon currently have the Noco jump starters on offer eg. GB20 £64 & GB40 £80 plus others

When I purchased my GB40 I paid £110

I’ve had my GB40 for a couple of years and I just charged it up for only the second time ever and it still had over half charge

Since I’ve had my GB40 I haven’t needed to use it but it’s there for peace of mind!

These are bargain prices for Noco jump starters at the moment and I don’t think you will find them cheaper ever!
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Honda Jazz Mk2 2008-2015 / Re: Advice needed! Cylinder 3 spark plug hole dethreaded
« Last post by Kuruuvi on February 15, 2025, 05:48:01 PM »
The other option maybe to swap it with lower mileage engine as it will serve you for many years even if the cost is slightly higher now. You could get a low mileage engine for about £200.
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Honda Jazz Mk4 2020 - / Re: MPG for those interested
« Last post by Enfrance on February 15, 2025, 05:33:27 PM »
My Lord,  :) thank you for all that. It’s very interesting and I have seen the row of green leaves while sitting at some lights. I will take your advice and do a 30 minute trip and see if it helps.

The various choices for driving modes should be fun

Like everyone on here I keep a note of all of my mileage and fuel, old habits die hard, so it will be interesting to see how it turns out.

I will report back when I have something positive to offer.
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Honda Jazz Mk4 2020 - / Re: MPG for those interested
« Last post by Lord Voltermore on February 15, 2025, 03:37:24 PM »
I’ve had my 2021 Jazz for just 24 hours and am very pleased with it but, the mpg being quoted on the dash is only 37.3 which isn’t as good as the 2019 Civic 1 litre I traded in. Despite its age it has only 915 miles on the clock so it must have sat in the drive of the disabled previous owner for long periods of time. I’m a complete novice to hybrid driving so any guidance would be very helpful.

So is there a golden rule for achieving decent mpg and what are the best settings on the car for doing so?

I fit the apparent demographic for the Jazz being 85 but thankfully quite fit. The heated steering wheel was a seller for me.
It may be because  the dealer recently  reset the trip meter  to zero  or it reset itself when they ,or you, put some petrol in the car. If shortly after this reset  the car is held up in traffic  with the engine running , but not moving very far, or you sit in the car learning its  'clever tricks, or its in a workshop being serviced,  the computer will register  quite a lot of petrol being used  by the engine but very  little distance covered.  This will be converted to a very bad, and misleading , MPG figure.
To illustrate  this you may have noticed the little row of green eco  performance trees displayed . Its the computers assessment of how economically you drove on that trip.  ;D In normal driving I get lots  of green leaves.   But if I start the car briefly to move it on the drive or check something on the  display etc  I get bare trees.  The computer is most unimpressed with how much gas I guzzled on that 'trip'.   :P

If you swop the trip meter between A  and B you may see a different, more typical  MPG displayed. But even this one may not be great if, as the mileage suggests, the previous  owner only did short journeys.As  Kremmen says  short distances with the engine cold  will see MPG at its worst.   


When I took delivery of my brand new car  with very few miles on the clock( ,and those mostly stop/ start on and off the ship , into the dealers yard ,pre delivery inspection  etc ) , the mpg displayed  was similar to yours.  It remained a terrible  average for the first  50 miles or so  when it rapidly improved to my more typical 66 mpg.     
Main advice for good mpg is drive it with a  gentle throttle. Try to get a 'feel' for when the car is happy.  Sometimes just   easing back on the throttle a little  brings good improvement in mpg with little loss in speed.
Some find using Econ mode helps by stifling throttle response a bit. Some prefer using B mode rather than D mode   But check out then pros and cons of each on this site and see how you get on.

Heated steering is great. Heated seats even better.. Using these  for the  first few miles on a cold engine instead of cabin heating improves mpg. 
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