What you meant to ask is how often should the timing belt be replaced! And the answer is every 90,000 miles for b2000 model.Ok
from Mazda or you could try your local library they often have workshop books.
The 1986 Mazda B2000 typically features a speaker size of 6.5 inches in the front doors. Depending on any aftermarket modifications, the rear speakers can also vary but are often around the same size. Always check the specific vehicle configuration, as features may vary by trim level and options.
They are replaced when they go bad.
One week
The Honeywell filter should be replaced every 8- 12 months or as needed.
When they wear out.
about every 2 years
Although there is no set on how often your brakes should be replaced, I would just pay attention to your car. When you notice something wrong, I would call your auto body shop.
Fridge filters should typically be replaced every six months to ensure clean and safe drinking water.
Eyeglasses should be replaced typically every two years. Eyeglasses can break or if expiration is past then a new examination should be taken to get a new pair.
Whenever they get REALLY yucky, or ripped apart.
every 6 months i think