Author Topic: High mileage mk 4 Jazz  (Read 20503 times)

coldstart

  • Approved Member
  • *
  • Posts: 823
  • Country: ch
  • Fuel economy:
  • My Honda: MY24 Jazz Adv
Re: High mileage mk 4 Jazz
« Reply #15 on: August 02, 2026, 09:07:34 PM »
Is it too simplistic to say that if a hybrid runs in EV  mode for maybe 25% of the time, if the car has done a total of 56K miles the ICE itself has only done the equivalent of  42K miles?
I think it is more important, that the Honda e:HEV drive train mostly keeps the ICE at predefined "optimal" load levels. This cannot be compared with a conventional ICE car, where the engine has to provide power at all times - probably even mostly under less than optimal conditions.


Nicksey

  • Approved Member
  • *
  • Posts: 763
  • Country: gb
  • Fuel economy: 70 mpg
  • My Honda: Honda Jazz Hybrid EX Style
Re: High mileage mk 4 Jazz
« Reply #16 on: August 03, 2026, 04:26:51 PM »
Today our 72' plate EX with 42,360 miles had it's 4th service (of it's 5 year plan).
We did decide to have the AC checked/cleaned/re-gassed, as we use it constantly at the moment and I also wanted to see how the condenser was holding up. They charged me £89, and everything was good. Something else less to stress about further down the line.
I had asked prior to the service about the brake simulator, but as it is still showing no recall for my car it wasn't deemed necessary at this time. Fair do.
Everything else checked out, the engine oil/filter and transmission fluid (along with the wiper solution) were all replaced. The electric battery passed on all points, and is still at optimum performance. The TOYO tyres I replaced the YOKOs with have done 11,000 miles and are only just shading under the 6mm mark at each corner. Brake wear is at 35%, which is phenomenally good for a 40k + mileage car.
So, I am happy and the car is good for another years driving.

gusgeds

  • New Member
  • Posts: 4
  • Country: gb
  • My Honda: Jazz Advance
Re: High mileage mk 4 Jazz
« Reply #17 on: August 03, 2026, 06:41:44 PM »
Really no problem with the recommended C5 0w/20 lubricant. I choose to change mine every six months/5000miles with C5 508/509 spec oil which fulfils the C5 0w/20 requirement but with a very strong additive package, overkill probably, but my choice for hopefully a long trouble free life.

Lincolnshire Rambler

  • Approved Member
  • *
  • Posts: 359
  • Country: england
  • My Honda: Jazz mk4
Re: High mileage mk 4 Jazz
« Reply #18 on: August 04, 2026, 09:07:16 PM »
And at almost 75k miles the front discs show minimal wear , maybe 1mm at most . They dont look smooth and shiny as the vast majority of retardation is in Regenerative mode . So should last 10,000 s of miles yet .

nowster

  • Approved Member
  • *
  • Posts: 957
  • Country: gb
  • My Honda: 2021 GR3 Jazz EX i-MMD in Midnight Blue
Re: High mileage mk 4 Jazz
« Reply #19 on: August 07, 2026, 02:23:00 PM »
Nearly 64,000 miles in mine.

The engine is Atkinson cycle, which performs best at higher revs. This is the big win in efficiency. The battery is there to act as a energy sponge. The generator/motor combination allows for high torque at low speeds whilst running the ICE in its highest efficiency range.

That's compared with the VVT of earlier Jazzes which switch between Otto and modified Atkinson cycles depending on load.

And the drive train is amazing at climbing steep hills.

Brake pads last much longer due to regenerative braking. In fact you'll probably have the discs called out at a service for getting rusty before the pads need changing. (The way to fix that is to do a series of low speed firm braking operations: the regenerative system doesn't kick in below about 5mph.)

Jazzik

  • Approved Member
  • *
  • Posts: 1833
  • Country: pl
  • Fuel economy:
  • My Honda: Honda Jazz e:HEV EX(ecutive) 2021 - Premium Sunlight White Pearl, name: Miles (after Miles Davis)...
Re: High mileage mk 4 Jazz
« Reply #20 on: August 19, 2026, 01:35:20 PM »
In fact you'll probably have the discs called out at a service for getting rusty before the pads need changing. (The way to fix that is to do a series of low speed firm braking operations: the regenerative system doesn't kick in below about 5mph.)

Our Jazz has a perfect brake disc cleaner on board:


Drive at a reasonable speed (on an empty road!) and activate the handbrake. You know, that lever with the red LED in the picture.
The handbrake works on all four wheels. If you use this trick every now and then, your discs (yes, the rear ones too!) will stay beautifully shiny and free of rust.

By the way, it serves not only as a handbrake but also as an emergency brake. Should something serious happen to the driver, the passenger (provided one is present and informed, of course) can bring the car to a halt using the same lever.


If nothing goes right, go left!

sebastiand

  • Approved Member
  • *
  • Posts: 43
  • Country: es
  • My Honda: Jazz e:HEV (2026, Elegance, Sunlight White Pearl)
Re: High mileage mk 4 Jazz
« Reply #21 on: August 21, 2026, 07:00:29 PM »
In fact you'll probably have the discs called out at a service for getting rusty before the pads need changing. (The way to fix that is to do a series of low speed firm braking operations: the regenerative system doesn't kick in below about 5mph.)

Our Jazz has a perfect brake disc cleaner on board:


Drive at a reasonable speed (on an empty road!) and activate the handbrake. You know, that lever with the red LED in the picture.
The handbrake works on all four wheels. If you use this trick every now and then, your discs (yes, the rear ones too!) will stay beautifully shiny and free of rust.

By the way, it serves not only as a handbrake but also as an emergency brake. Should something serious happen to the driver, the passenger (provided one is present and informed, of course) can bring the car to a halt using the same lever.
I tried it today. Couple of times. Cool featured.

I used it a few times to go from 70kmph to 40-60. I got a few times the release parking healing warning (that I managed to read in one of the attempts because I was releasing before being able to read)

Sent from my Pixel 9 using Tapatalk


Lord Voltermore

  • Approved Member
  • *
  • Posts: 3231
  • Country: gb
  • Fuel economy: 66.6 mpg
  • My Honda: 2024 advance
Re: High mileage mk 4 Jazz
« Reply #22 on: August 22, 2026, 10:18:51 AM »
I think all mk4 drivers  should try this at least once even if your discs dont need cleaning.

The button is also your emergency brake,  in the unlikely event of not being able to use the foot brake.(eg complete hydraulic failure, maybe the brake pedal siezing or dropping off, or your leg trapped, or some sort of medical emergency.) Its not as obvious as using a conventional handbrake lever  , so familiarity with the system makes it more likely you , or a front seat passenger (even non drivers who have been 'initiated')  will react more quickly  and be able to stop the car in an emergency.

You just need to pull the button up with a finger ,and keep it pulled up.  . For a second or two the braking affect is quite slight.  Maybe to give the driver time to react if a curious passenger unexpectedly pulls on the switch.    But braking quickly becomes more powerful perhaps reaching a more rapid stop than you are comfortable with. If so just release the switch a bit.  With a bit of practice you can actually control the rate of braking  by easing off on the switch slightly which could help you come to a more controlled stop - if you have room. But not a 'skill' that has any practical use in normal driving. ;D 

It also gives reassurance that the car has effective independent  duplication of its braking systems  . In the event of hydraulic failure or non function of the foot pedal, the electrical systems would still be able to apply either partial hydraulic braking, or if there are no hydraulics at all  it can still apply the powerful electric rear parking brakes . In the event of complete  electrical failure the hydraulic brakes should still be working, albeit without (electric) power assistance.

In the most unlikely even of both systems failing at the same time I think you must accept your fate  is sealed ;D

I really like an electric handbrake.  Especially coupled with the cars 'brake hold' function.   But no more 'handbrake turns'  :(
« Last Edit: August 22, 2026, 10:22:55 AM by Lord Voltermore »
My IQ test came back negative

Tags:
 

anything
Back to top