What does ME7Sum say?
It probably isn't stock.
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\Kirsch's>me7sum stockaudi.bin
ME7Tool (v1.0.3) [Management tool for Bosch ME7.x firmwares]
Inspiration from Andy Whittaker's tools and information.
Written by 360trev and nyet [BSD License Open Source].
Attempting to open firmware file 'stockaudi.bin'
Step #1: Reading ROM info ..
Searching for EPK signature...OK
Searching for ECUID table...OK
EPK : '40/1/ME7.1/5/6005.01//22m/DstD1o/110700//'
Part Number : '8D0907551L '
Engine ID : '2.7l V6/5VT '
SW Version : '0001'
HW Number : '0261207004'
SW Number : '1037354145'
Step #2: Reading ROMSYS ..
Startup section: word[0x008000]+word[0x00FFFE]
@008038 Add=0x013225 CalcAdd=0x013225 ADD OK
Program pages: 8k page first+last in 0x0000-0xFFFF and 0x20000-0xFFFFF
@00803c Add=0xAC48D3 CalcAdd=0xAC48D3 ADD OK
All param page: word[0x010000]+word[0x01FFFE]
@01b9b0 Add=0x00971D CalcAdd=0x00971D ADD OK
Step #3: Reading RSA signatures ..
Searching for RSA offset #0...missing
Searching for RSA offset #1...missing
Step #4: Finding CRC table(s) ..
Searching for CRC table(s)...OK
CRC table(s) OK
Step #5: Reading Main Data Checksums ..
Searching for main data CRC pre block...missing
Searching for main data CRC/csum blocks...OK
Searching for main data CRC offsets...OK
Searching for main data checksum offsets...missing
Main CRCs:
1) 0x010002-0x013FFE @7a866 CRC: 3B8670EB CalcCRC: 3B8670EB CRC OK
2) 0x014252-0x017F4E @7a86c CRC: 1EDBA882 CalcCRC: 1EDBA882 CRC OK
3) 0x018192-0x01FBB0 @7a872 CRC: C8B26E0D CalcCRC: C8B26E0D CRC OK
Step #6: Reading Main Program Checksums ..
Searching for main program checksum..OK
ROM Checksum Block Offset Table @1e75a [16 bytes]:
1) 0x000000-0x00FBFF CalcChk: 47AE74F4
0x00FC00-0x01FFFF CalcChk: 28DFE26A CalcCRC: CC5B207C SKIPPED
2) 0x020000-0x0FFFFF
<fffe0> Chk: 90547AD3 CalcChk: 9CC2F998 ** NOT OK **
Step #7: Reading Multipoint Checksum Blocks ..
Searching for multipoint block descriptor #1...OK
1) <14224> 0x024000-0x02658D Chk: 0B08F804 CalcChk: 0B08F804 OK
2) <14234> 0x014000-0x014243 Chk: 00591FE7 CalcChk: 00591FE7 OK (i)
3) <14244> 0xFFFFFFFF-0xFFFFFFFF END
Multipoint #1: [2 blocks x <16> = 32 bytes]
Searching for multipoint block descriptor #2...OK
1) <1fbb2> 0x000000-0x003FFF Chk: 0FA0F5CF Boot: (whitelisted) OK
2) <1fbc2> 0x004000-0x007FFF Chk: 0F4716B3 Boot: (whitelisted) OK
3) <1fbd2> 0x000000-0x003FFF Chk: 0FF7275A CalcChk: 0FF7275A OK
4) <1fbe2> 0x004000-0x007FFF Chk: 0F68CD6E CalcChk: 0F68CD6E OK
Multipoint #2: [66 blocks x <16> = 1056 bytes]
*** Found 73 checksums in stockaudi.bin
*** WARNING! 1/1 uncorrected error(s) in stockaudi.bin! ***