Please or to access all these features

AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

If you have a car, do you check the fan belt regularly?

86 replies

HundredAcreOwl · 07/09/2025 22:54

Half fun, half serious.

Our older child, 30s, their car wouldn't start. They had to work when the help could come out (one of AA, RAC, Green Flag), so their housemate gave the person the car keys. All was sorted, it was the fan belt, but the person said they should have checked it regularly, implying it was their fault. Their car is serviced every year with the MOT.

AIBU You check your fan belt, or someone does, apart from regular services
AINBU You ignore the fan belt until it goes

Rather wish there was a third option - showing my age - who keeps a pair of tights in the car in case the fan belt goes?!

Edited to correct perspective, and add the tights...

OP posts:
New posts on this thread. Refresh page
KellySeveride · 18/10/2025 18:06

Whilst they’re still colloquially known as fan belts they no longer drive the fan. All ICE engines will however have this belt, also known as serpentine/auxiliary belt because without it your air con wouldn’t work, your power steering wouldn’t work, your alternator wouldn’t charge and on some engines your water pump wouldn’t work!

Important to get it changed if it starts squealing or chirruping because on cars with a rubber timing belt there’s a risk the fan belt snapping can also take out the timing belt and be catastrophic to your engine.

Routine replacement is often around 50-70k miles.

EBearhug · 18/10/2025 17:58

There has been a real dumbing down in recent years . 20/30 years ago people were much more car savvy and would know how to check basic items themselves / change a wheel etc.These days people are more clueless.

That's not entirely drivers' fault. When I got my first cars, they all came with a spare wheelchair. Now I get a bottle of gloop instead - obviously this doesn't stop me checking tyre pressure and thread depth, but it does mean i couldn't do much other than call the AA when I got a large hole in my tyre.

I did question a colleague yesterday who said he'd been helping another colleague check the oil in her car, and I even question if he meant just a normal dipstick check, because who needs help with that? (It's possible she is entirely capable of it - he's good looking and single.)

When I had battery problems, I can change that alone. I can't do the magic that was required which the AA did by plugging in a device and doing stuff to the electronic management system. And lots of car problems need that sort of thing these days.

Shade17 · 18/10/2025 17:36

BatchCookBabe · 18/10/2025 17:24

@HundredAcreOwl Are you posting from the 1980s? Cars have not had fan belts for more than 35 years! 😆

Not belt driven fans perhaps, but the aux or serpentine belt is still colloquially known as a fan belt and I think we know what someone is talking about when they refer to it as such.

BatchCookBabe · 18/10/2025 17:24

@HundredAcreOwl Are you posting from the 1980s? Cars have not had fan belts for more than 35 years! 😆

Doris86 · 18/10/2025 17:14

There has been a real dumbing down in recent years . 20/30 years ago people were much more car savvy and would know how to check basic items themselves / change a wheel etc.These days people are more clueless.

Drivers really do need to take some responsibility. Knowing how to check your tyres to see if they are within the legal limit for example. It is you as a driver who will get fined and points on your licence for having bald tyres. The argument that you had it serviced 9 months ago and they were ok then wouldn’t hold any water.

HundredAcreOwl · 18/10/2025 14:45

Thanks so much everyone. The main point was that someone from a recognised organisation blamed the car owner, my adult kid, and my adult kid really thought they were at fault. It bothered them a lot as the car means so much in terms of independance.Thanks, all, it's clear they weren't at fault.

I do make sure I can open the bonnet on a 'new' car, know where the dipstick, screenwash etc. are, but I do also rely on the regular servicing the car has.

OP posts:
TheActualDuck · 18/10/2025 13:35

Good grief, I don’t even know how to open the bonnet. It’s a hybrid, would they have a fan belt?

Shade17 · 18/10/2025 12:48

RealOliveTraybake · 18/10/2025 12:12

If you think mechanics are doing that, you're due a wake-up call

Mine do, it’s a very quick check and an easy potential upsell. You need to find better mechanics.

AcquadiP · 18/10/2025 12:34

HundredAcreOwl · 07/09/2025 23:36

Today I learned that some cars have chains, and that electric ones have neither -
thanks everyone!

Just for clarification, my car has a chain rather than a drive belt but neither are the same thing as a fan belt. I never check my fan belt, that's checked at servicing and I've never had an issue with it.

zingally · 18/10/2025 12:28

While I've heard of a fan belt, I wouldn't know where in the car it was, what it looked like, what the purpose is, what are the symptoms of it breaking down, or how to even begin to fix it.
That's what I pay a garage to do. Plus I'm a member of the AA for these sorts of events.
My car gets an in-depth service every year, at the same time as its MOT.

wombat1a · 18/10/2025 12:16

Haven't seen a car since around 80/90s with a fan belt, almost all have an electric fan instead.

If the timing belt/chain has broken then 99% of the time you are looking at a destroyed engine (and possible write-off).

If the alternator belt has gone then you should have seen a warning light come on at some point saying the battery was not charging.

RealOliveTraybake · 18/10/2025 12:12

Shade17 · 18/10/2025 11:23

On the contrary, “inspect condition of aux belt” is a pretty common component of a service.

If you think mechanics are doing that, you're due a wake-up call

HostaCentral · 18/10/2025 12:11

I had a timing chain blow a few years ago. The car had just had its annual service, and at 60k, should have replaced the chain. Garage had to cover the cost of a new engine. It made a fantastic noise I can tell you.

ShinyAppleDreamingOfTheSea · 18/10/2025 11:48

No idea where my fan belt is or what it does.
I put petrol in occasionally, although my DH does this mainly, plus checking tyres and other bits like that. It has a yearly MOT and service and I’ve got breakdown cover.

As long as I know how to operate things and who to contact when they go wrong, I don’t need to know how they work and have no interest in this. This applies to any machinery or electrical equipment.

Shade17 · 18/10/2025 11:23

RealOliveTraybake · 18/10/2025 10:37

Low mileage is detrimental to the condition of the auxiliary belt - you're much more likely to have a perished belt before it wears. An annual service won't cover this.

On the contrary, “inspect condition of aux belt” is a pretty common component of a service.

RealOliveTraybake · 18/10/2025 10:37

Thissickbeat · 08/09/2025 18:12

I've never checked mine. I do low mileage, drive sensibly and always get an annual service.

Low mileage is detrimental to the condition of the auxiliary belt - you're much more likely to have a perished belt before it wears. An annual service won't cover this.

PurpleChrayn · 09/09/2025 08:32

I never check anything on my car. It’s a leap of faith every time I drive it.

Snoozysnoozy · 09/09/2025 08:26

HelpMeGetThrough · 09/09/2025 08:08

I have a handle

🤣😂🤣

HelpMeGetThrough · 09/09/2025 08:08

Snoozysnoozy · 09/09/2025 07:42

Who has a belt driven starter?

I have a handle

HelpMeGetThrough · 09/09/2025 07:58

Arlanymor · 07/09/2025 23:06

My car doesn’t have a fan belt, it’s a chain.

Are you sure you aren’t confusing timing belt/chain and fan belt here?

Snoozysnoozy · 09/09/2025 07:42

Who has a belt driven starter?

CrystalSingerFan · 08/09/2025 23:11

Bjorkdidit · 08/09/2025 18:35

Why would anyone write all that about something they know so little about?

Welcome to the internet. (Or should I say the World Wide Web?)

No idea if the previous reply is useful, BTW.

BUT, my "Toyota Corolla mild hybrid does not have a traditional fan belt; the hybrid system uses electric motors and a battery, which eliminates the need for a belt-driven alternator and starter, replacing their functions and reducing components that require maintenance. The hybrid system takes over the roles of powering the vehicle's accessories that a fan belt would typically drive in a conventional car."

I do not work for Toyota. I pay a garage.

Alphabet1spaghetti2 · 08/09/2025 22:49

Car - never. Boat yes everyday. This car doesn’t have one. Timing belt gets changed at 120k miles. So far it’s not achieved 70k miles in six years.

Sundaymorningcalla · 08/09/2025 21:51

Arlanymor · 07/09/2025 23:54

Some engines are belt-driven, some have a durable timing chain. Mine has a durable timing chain, as is common with cars that have a 2.0 litre engine and above. But yes, fan belt engines will always be fan belt engines... as I said mine is durable - in the same way that my car has double vented brake discs and a dual mass flywheel. Other cars also have single vented brake discs and a single mass flywheel. These components are about the performance of the car and the spec you buy. I will never have that squealing noise that tells me my fan belt is about to go because I simply don't have one.

Timing chain and durable don't belong in the same sentence!

HundredAcreOwl · 08/09/2025 21:42

Mslongears · 08/09/2025 19:48

I don't, but I'm lucky enough to have a partner who knows everything there is to know about cars. Especially older ones, which we have many of. But I definitely wouldn't be expecting the majority to even know where to locate a fanbelt, let alone check it 😂

I'm interested in how old they are, and the manufacturers? I passed my test on a Mazda, light and short, next day was driving my mother's 1956 Riley with a huge sweeping front and back, taking up far more space, no power steering. Gorgeous cars, my father had several Rileys. At least one had the stick-out indicators rather than lights. And a running board!

OP posts: