Mk4 2021 Jazz Brake failure

[Lord Voltermore]

I think estimating numbers based on forum membership posts would be misleading.  At 0830 this  morning (UK time) the site already  showed 321 visitors on line  , but only 5 'users' . Many times more casual viewers than members able to post comments .  And even those visitors would be  a small proportion of total Jazz ownership . 
  But a fair number of those 321 visitors might be prompted to join the forum specially and make posts  if they have experienced a fault such a the brake simulator.  Certainly more than those who would join just to say " Nice car,I've had no problems",  So it could be argued that  any  faults  are disproportionately reported on forums.

I've tried an an alternative way of estimating  ,but this is equally dubious .
 Honda have sold approximate 310,000 Jazz  in the UK since 2002.  An average of about 13500 per year.  They currently have about 122 car dealerships in the uk ,so an average of about 110  Jazz sold  per dealership per year.    A dealership may therefore have sold about 300 mk4's over the period of 3 years when they may be susceptible to brake simulator failure.

One or two have reported on this thread that their dealership has admitted to repairing  a few actual failures,  but typically only 2 or 3.   Assuming the dealership is being totally honest ,which is by no means certain, this represents a failure rate of about 1%.     

[ColinB]

The reported crash does NOT seem to fit with others experience.

Maybe some other contributory factor?

Well, only with the failures reported on this forum.
How many VIN No. affected Jazz owners are there that aren't on this forum?
Quite a lot I imagine.

278 people on forum have given the car colour, maybe/maybe not all members but a reasonable number to give a reflection of failure rate in the general population - maybe someone can count number of failures and if car moving or static?

Was discussed last year. See post #525 ...
https://clubjazz.org/forum/index.php?topic=16448.525
... and the following posts.

[Nickvatman]

I am very confused as to why some people have said it has cost them over £1000 to rectify this fault.  My invoice from a main dealer, which of course Honda paid, was a few pence over £418. So either some dealers are taking the mick or some very spurious figures are being quoted. And yes it is a pity that Honda didn't put their hands up earlier. I moved to Honda after Kia said that a litre of engine oil per 2000 miles of driving was perfectly acceptable for an in warranty car.

[Kremmen]

What keeps niggling me is the Jun 4th accident post

By the time the post was made, the owner had had the accident, been paid out by insurance, bought a Yaris, and had time enough to make a decision he considered it was better. Then try and generate or find a joint civil action group

If that was me I'd have posted the same or next day with some follow up posts as it progressed to make others aware failure could happen while driving

The OP registered end of April so knew we were here

Apologies to the OP if this is wrong but it rang alarm bells when I looked closer

[aphybrid]

Like Kremmen the "accident" brake failure incident felt wrong to me and I noted it in my post;

"The reported crash does NOT seem to fit with others experience.

Maybe some other contributory factor?"

In fact very suspicious in my view.

[Kremmen]

My immediate reply was a good Yaris advert

I remember something similar on a Civic forum I was on and the site owner managed to track the post to a Ford link

[Jazzik]

DemoDave, the 'victim' of the brake feel simulator drama, was last active on this forum on July 8, 2025, at 9:10:27 PM, https://clubjazz.org/forum/index.php?action=profile;u=14541 but has remained silent.
I'm going to try to get a response from our Dave by stating that I don't believe his story.

Perhaps writing here that I think he made up a story on July 4, 2025, at 3:51:56 PM will be a reason for him to respond with some evidence of the cause of his accident. Assuming, of course, that the accident actually happened.

I'm anxiously awaiting!

[Spodric]

This thread has had over 3.72 million views !    Take note Honda executives.   Dont mess with your  reputation and customer goodwill  to impress your bosses /shareholders that you have saved a few bucks.   

I hadnt realised the citroen recall was due to 'shrapnel'    .Well done  Citroen for taking no further risks .

Re the Takata airbags - my recollection from listening to French radio while on holiday is that the French authorities have opened a criminal investigation following 3 deaths attributed to defective airbags.

On the point raised by DemoDave's post about his crash following sudden brake failure, I do believe that situation is plausible. His comment "... helplessly standing on a unresponsive brake pedal ..." is exactly what I felt at a mere 5-10 mph after I had managed to get my Jazz moving again along our street. It took enormous foot pressure on the brake pedal, that had almost dropped to the floor, to get a very slight retardation. It was a scary experience. No way was it driveable. Eventually the Jazz stopped, and then I managed to reverse it back into its parking space.

[TseuHi]

Perhaps Honda's brake simulator replacement policy here in Poland is fundamentally different from that of Honda UK.
In our case it went like this: I check the website for recalls and after entering the VIN I see:

"There is an outstanding recall/update on your vehicle:
Abnormal brake pedal feel and warning lamp 'on'

Yesterday our brake servo feel simulator was replaced.

Hey everyone, I'm from France and I got my car serviced yesterday for the exact same recall as mentioned above. But, even though I asked my dealership 3 times, by phone and then in person, they only replaced the master cylinder and assured me that this had nothing to do with the brake feel simulator.

Should I be worried? Because, on one hand, I suppose that my dealer doesn't choose what is to be replaced for a recall and that they follow Honda France / Europe procedures, and on the other hand, it's kind of strange that for the exact same recall title, they don't replace the same mechanical part in Poland and in France.

Again, should I be worried? 

[Marmoset]

Perhaps Honda's brake simulator replacement policy here in Poland is fundamentally different from that of Honda UK.
In our case it went like this: I check the website for recalls and after entering the VIN I see:

"There is an outstanding recall/update on your vehicle:
Abnormal brake pedal feel and warning lamp 'on'

Yesterday our brake servo feel simulator was replaced.

Does your VIN show anything on this page? https://auto.honda.fr/cars/owners/rappels-et-mises-a-jour.html

Hey everyone, I'm from France and I got my car serviced yesterday for the exact same recall as mentioned above. But, even though I asked my dealership 3 times, by phone and then in person, they only replaced the master cylinder and assured me that this had nothing to do with the brake feel simulator.

Should I be worried? Because, on one hand, I suppose that my dealer doesn't choose what is to be replaced for a recall and that they follow Honda France / Europe procedures, and on the other hand, it's kind of strange that for the exact same recall title, they don't replace the same mechanical part in Poland and in France.

Again, should I be worried? 

Does your VIN show anything on this page? https://auto.honda.fr/cars/owners/rappels-et-mises-a-jour.html

[embee]

I wonder whether there is just some confusion in terminology? Master cylinder vs Brake feel simulator,  possibly the same thing just different words depending on who you speak to?

[TseuHi]

Does your VIN show anything on this page? https://auto.honda.fr/cars/owners/rappels-et-mises-a-jour.html

My dealership must not have updated it yet. My car was serviced there yesterday for 4 hours for that precise recall, and what's showing on this page is exactly the same as for Jazzik :
Numéro NIV: JHMGRXXXXMSXXXXXX

A ce jour, des opérations en attente doivent être effectuées :

Abnormal brake pedal feel and warning lamp 'on'

I wonder whether there is just some confusion in terminology? Master cylinder vs Brake feel simulator,  possibly the same thing just different words depending on who you speak to?

I suppose that is an option..
I don't know if we can trust AI, but about what you just said, Gemini says :

On modern systems like your Jazz's, the master cylinder, electric servo motor, electronic control unit, and brake feel simulator are all contained within a single integrated brake module.

So, when the dealership replaced the "master cylinder," they undoubtedly swapped out the complete electric servo brake unit, which contains the brake feel simulator.

[canterhans]

My apologies if my question has been asked and answered before, but I don't really want to go through 64 pages to check.
I received the letter about the recall back in April. Consulted with the local dealer  and agreed that this would be handled at the next annual service which was due in September. Car went in last week and as I am currently away my wife handled this.
Now the letter received from Honda clearly mentions '.....repair, which is free of charge.."
The invoice (which only shows the MOT as a chargeable item as the car is still under the service plan), says:
"abnormal brake pedal feel and warning lamp 'on'. Mileage 24116 - all ok'. The mileage of the car when checked was actually 25115 (so possibly an error).
So it would appear the item was NOT repaired. Question: is it possible to check this and come to the conclusion that repair was not required? Have they just fobbed my wife off?
Thanks

[chicksee]

Sounds to me they fobbed her off. Mine is also a 2020 model and has been done and I’m pretty sure yours most certainly should be done.
I would either give the dealer another try or look elsewhere.

[aphybrid]

My apologies if my question has been asked and answered before, but I don't really want to go through 64 pages to check.
I received the letter about the recall back in April. Consulted with the local dealer  and agreed that this would be handled at the next annual service which was due in September. Car went in last week and as I am currently away my wife handled this.
Now the letter received from Honda clearly mentions '.....repair, which is free of charge.."
The invoice (which only shows the MOT as a chargeable item as the car is still under the service plan), says:
"abnormal brake pedal feel and warning lamp 'on'. Mileage 24116 - all ok'. The mileage of the car when checked was actually 25115 (so possibly an error).
So it would appear the item was NOT repaired. Question: is it possible to check this and come to the conclusion that repair was not required? Have they just fobbed my wife off?
Thanks

Why not just ask precisely - quoting the Honda letter if the recall notice was actioned - if necessary get it endorsed on dealer paperwork.