what speaker are you planning to change to?

I send my Vios for service at Toyota SC and the staff said time to change my stock maintanence free battery after he heard some cranking sound when switching on the engine. Later he uses an electronic device to check the battery and the indicator show as "Replace Battery"

But my car only 1.5 years new and I have not encountered any sign of needing to turn the ignition more than 2 times to start my engine.

How often you guys change your car battery ?

Mine same like yours...2nd gen with FB battery. After changing to new battery, I could feel better performance and engine smoother.

Currently at the Toyota SC and they told me that replacing the spark plugs outside could very well void the warranty if there are any knocking issues. So I asked them how much are the iridium plugs and they quoted me RM79 each so for a Vios I would need 4, will be above RM300.

i'm also thinking to change the headlamps... Considering between Philips X-treme power (3400K) and PIAA (3800K), i saw some 5000K, looks... Ah beng bluish

thinking only... between RM140 - RM180 for a pair of bulbs is

14" ori sport rims sure can fit 185/60 r14... but i heard the steel rim cannot...

jz change 185/60/14 michelin xm2
the shop say the original steel rim can fit...
rm175 for the tyre+balancing+allignment

currently using denso iridium, acceleration & power definitely improve, better lifespan for the plugs which u will only change it max every 100,000km & save up your $ 

Better change outside as sc will be more ex le...BUT nowadays there was a lot imitation in the market so be kful when buying it 

mine G with foglamp also feel that it's a bit dark at night
also thinking of changing to better bulbs... thinking between Philips/PIAA... both also very expensive RM140/RM180

Philips xtreme power is 3400k
PIAA Xtreme force is 3800k
both also yellowish, lower K, more yellowish
i think installation the same, plug and play H4...