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var=047377710;sed -n "/^03,$var/,/^49,/p" infile > newfile

For example, i have put the following code in a script call "ak"
f=tst.abc
p=$1
t=${p%????}
ext=${p#$t}
awk -F"," -v P="$p" -v c="${f%.*}.${ext}" -v n="${f%.*}.new"...

Try
xargs -d"\|" file | tr '|03,' '\n' | grep "^03,047316555"| tr '\|' '\n'

f=1234.abc
p=12345555
t=${p%????}
ext=${p#$t}
nawk -F"," -v P="$p" -v c="${f%.*}.${ext}" -v n="${f%.*}.new" '(NF==2){f=($2==P)?c:n}{print $0 > f}' "$f"# cat 1234.5555
03,12345555
16,936,x,x,120...

If your input file is having non variant data, I mean starting account data with id 30 and than 2 lines of data with id 16 and finishes with id 49 then I have a very simple solution for it.

xargs...

awk '
NR == FNR && $5 != 0 {
if ($4 > m1) {
m2 = m1
c2 = c1
m1 = $4
c1 = $1
} else if ($4 > m2) {
m2 = $4
c2 = $1
}
}
NR > FNR && ($1 == c1 || $1 == c2)
'...