can the maps on the multimedia system be updated on the myvi 1.5SE??

how?, can update ownself or need to go perodua sc?

cancelled because of the increase in price or because of the need to wait till next year for the non-multimedia?
So, you getting the multimedia SE?

Same story, I have cancelled my booking of the non-multimedia SE... Cant wait d...

Mine is auto. Since there may be a slight difference with the manual, why don't you go try it? If the air filter box is at the same/similar level with the front strut bar after installing then I can be very sure that the air filter box will hit the bar when you accelerate because the current front strut bar design for existing MyVi when installed in the 1.5, it is too far out that's why it will come to contact with the air filter box easily since there's not much gap in between. I've seen the custom made one by Ultra Racing for mine, slightly slimmer if I'm not mistaken and it doesn't curve out so much giving it more gap from the air filter box.
If I'm not mistaken, Ultra Racing did revised their design for certain bars along the way for the MyVi. From what I heard, the very first front strut bar from Ultra Racing for the MyVi was a lot thicker and they revised the design to make it less bulky later on. So perhaps it might be a similar case for your rear anti-roll bar provided that you bought it quite a long time ago.

anyone know the rear speakers of the old myvi is how many inches?

Yup... Can fit... Already change mine to american sound 4inch front and 6 inch rear... Both also 2 way...

For those LB owner who want to change your HU the casing is out... Check it out...
Mudah LB HU casing

Not just that... The coolant, the brake fluid level and the power steering oil... Monitor their level... If go below minimum level just topup... I cannot help you crop the above things i said bcos i use handphone to online

The engine area not recomend to wash with water... They are some speacialist car wash that can do it... But to DIY if dont know about engine, better dont touch it... Just wipe with wet cloth can edy... Cheers...

Wash the engine bay after it has cold down. Not when it is still hot.

Same thing for the disc brake areas.

Why my brake area turn rusty edy?

Are you referring to the brake disc that gets rusty?
As the disc is made from cast iron, having some surface rust is quite normal especially if the car is not used for a long period. However, the surface that are in contact with the brake pads will not rust; due to the abrasion from the brake pads.