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2008 Saab 9-3 Base 4dr Sedan

2008 Saab 9-3
Trim Info:
Front Wheel Drive, 4 Door Sedan, Compact
19 mpg city / 29 mpg hwy
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December 30, 2009, 3:04 pm

Henry S
 

Question: Does the Brake System need flushing?

I recently was told that there was a recommendation to flush the brake system and clean the fuel injectors before 25000 mi. True?


December 31, 2009, 6:03 pm

Ron W
Expert Mechanic

Well, some repair stations offer those services. I personally don't see a need unless it is specifically recommended by the factory, or you are having some issue that a service like that would help resolve.

Brake fluid is hygroscopic (means it absorbs water from the air), so changing it every few years is a good idea, but normally I would think about that when I was doing a brake service...not just by itself.

As for fuel injector service. build up of impurities can happen on the tips of the injectors, (normally the idle starts to get a little rough), but if you use Chevron (it has techron in it) fuel or another name brand fuel with cleaning additives, normally it's not much of a problem anymore. You can also buy techron (about $8) from autoparts stores and add it to your fuel tank once in a while (every six months or so). That will also help keep your injectors clean.


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January 1, 2010, 5:22 am

Henry S
 

Thanks. I thought so, but it good to hear your opinion. If my idle is rough I'll do the injectors, and if the brakes pads, rotors need service, I'll consider adding the flushing. One other question, I've heard that nitrogen air fills on tires makes them last longer, maintain their air, and offer better performance. Hyundai supplies that as standard on their models.

Is there any value to getting nitrogen air fill on new or old tires? What's the real reason?


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January 1, 2010, 9:52 am

Ron W
Expert Mechanic

Same kind of thing. Nitrogen is fine (in fact the atmosphere is almost 80% nitrogen.) It won't hurt anything to put it in your tires, but does it do much? I haven't seen much evidence (if there even is any) showing major benefits for using it. I know some places use it and believe it seals better and gives the tire a more balanced inflation, but I'm really not convinced. I still use plain old air (which is mostly nitrogen) in my tires as does most of the industry.


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