particle filter and brake fluid change

[pschaars]

I have a 944 and have been coming to Pelican for a while. My Dad is the lucky one with a 2007 911 C4. He bought the car in October and the dealership called a couple days ago saying the car is supposed to come in already. Their reason is the brake fluid needs to be change.

I am curious as to how hydraulic fluid has gone bad in three months. Actually, how does it go bad at all? This is a new one for me and was curious if any of you chemistry suave guys have any ideas for this.

Also reading through the maintenance schedule, it needs a new particle filter which seems to differ from the fuel, air and oil filters since those all get their own replacement dates. What is the particle filter? When does the flux capacitor get changed? is that two years from manufacturing too?

Apparently these cars have come a long way since my '90 S2 but I just wanted to make sure these are actually beneficial services and not just an ignorance fee.

Thanks for your help.
-Pete

[HarryD]

Originally Posted by pschaars

I have a 944 and have been coming to Pelican for a while. My Dad is the lucky one with a 2007 911 C4. He bought the car in October and the dealership called a couple days ago saying the car is supposed to come in already. Their reason is the brake fluid needs to be change.

I am curious as to how hydraulic fluid has gone bad in three months. Actually, how does it go bad at all? This is a new one for me and was curious if any of you chemistry suave guys have any ideas for this.

Brake fluid, by it very nature, absorbs water from the air. For cars ont he street, typically you flush the fluid every 1-2 years. What does the owners manual say for a change interval?

Also reading through the maintenance schedule, it needs a new particle filter which seems to differ from the fuel, air and oil filters since those all get their own replacement dates. What is the particle filter?

I think this is a filter to remove particles from the cabin air (someone with a newer car can correct me, if needed).

When does the flux capacitor get changed? is that two years from manufacturing too?

We normally coordinate these changes with a supernova event.

Apparently these cars have come a long way since my '90 S2 but I just wanted to make sure these are actually beneficial services and not just an ignorance fee.

It is always wise to know what you are paying for.

[911pcars]

I would agree with Harry regarding the particle filter being a cabin air filter. Inserted in the HVAC system, it filters air as it circulates through the vent system.

I'm sure the PAG filter is going to be expensive (?). For an alternate source, try Denso, USA. They carry a full line of cabin AFs. They might have one for your Dad's ride.

Sherwood

[kees]

Originally Posted by 911pcars

I would agree with Harry regarding the particle filter being a cabin air filter. Inserted in the HVAC system, it filters air as it circulates through the vent system.

I'm sure the PAG filter is going to be expensive (?). For an alternate source, try Denso, USA. They carry a full line of cabin AFs. They might have one for your Dad's ride.

Sherwood

Particle filter is a pollen filter and it is as Harry and Sherwood said a cabin air filter.

No, it's not that expensive (+/- 25 USD).

[pschaars]

thanks everyone! I appreciate the good insight. I will let my dad know and do a brake fluid change on my 944