Real general time frame would be about 5 years but this really should be done by inspection. Look at the belt for uneven wear, signs of fraying, normal wear, checking or cracking of the belt. Take a look at a new belt for comparison and most auto stores have a display of what to look for.
Question edited for clarity.
Question moved to model category.
You have a leak, you just need to find it.
Look for leaks in the hoses. Do a pressure test.
The most common reasons a Volvo S40 has a coolant leak are loose hose connections, a broken radiator, or a failed water pump.
They make a cd player cleaner you can buy about any audio store , I would give that a shot first. Looks like a cd with small brushes on it. The laser is probably dirty.
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Jan 13, 2021 - SA 16 DTC P245700. D13 VOLVO 2016. Driver sent me the code. SA 16 DTC P040100 - Answered by a verified Technician.
1 answer · Top answer: On your question. These faults are both related to egr flow. This is usually caused by a biased ...
JustAnswerhttps://www.justanswer.com > Truck Repair
May 23, 2021 - The code is usually caused by a plugged up EGR valve cooling system, defective EGR valve, or the EGR sensor being bad. The shop needs to start ...
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volvofaultcodes.comhttps://p245700.volvofaultcodes.com
P245700 DTC Fault Code. Code Meaning. Coolant efficiency of the exhaust gas recirculation system is below the threshold value. Type Of Malfunction. No subtype ...
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Question edited for clarity.
Question moved to model category.
This is a strange code that doesn't appear to have one definitive reason, it's a bit of "you have a bit of a problem, but we aren't sure". Just Answer dot com mechanic says it is the MAF Sensor.
https://p1004-volvo.autotroublecode.com/http://p1004.engine-trouble-code.com/
JustAnswerhttps://www.justanswer.com > volvo > iq32q-99-s70-v...
Feb 12, 2022 - On newer vehicles, the P1004 is for the short runner valve which is internal to the intake manifold and makes sure there is even air ...
1 answer · Top answer: HI This is 100% unrelated to your original question. I will answer this as a courtesy, but ...
Year of vehicle may help you get an answer as there were many radio changes. Mine has BlueTooth and many don't etc etc etc.
Why not pop into your Volvo Dealership for help.