flash programmer?

Asked by Jul 11, 2017 at 01:33 AM about the 2001 Ford Mustang

Question type: Maintenance & Repair

I put a 2003 engine and brain in a 2001
mustang. Ford dealer flashed my keys but
said he couldn't flash the computer because
the vin # didn't match or something but
could get it because purchased from u pull it
but said his computer wouldn't let him and
now after putting transmission,  engine,
computer & new fuel pump in he said i have
to spend another 500$ on a flash or
programmer or whatever it just don't sound
right to me. Can you explain it to me or tell
me what I need please

1 Answer


True the calabration code will be different from an 01 to an 03 but unless you changed the complete wiring harness it should still run on the 01 ECM that matches the vin. Unless you completely changed the power train from like a V6 to V8 then your going to either get the donor cars vin or pay to have the system completely reprogrammed.

Your Answer:

Ford Mustang Experts

  • #1
  • #2
    Bob Beaman
  • #3
View All

Related Models For Sale

Used Chevrolet Camaro
302 Great Deals out of 23,697 listings starting at $2,499
Used Chevrolet Corvette
175 Great Deals out of 15,758 listings starting at $4,500
Used Ford Mustang SVT Cobra
7 Great Deals out of 215 listings starting at $5,000
Used Ford F-150
3,006 Great Deals out of 225,100 listings starting at $1,400
Used BMW 3 Series
875 Great Deals out of 25,666 listings starting at $1,800
Used Chevrolet Silverado 1500
2,332 Great Deals out of 169,859 listings starting at $1,500
Used Jeep Wrangler
386 Great Deals out of 20,737 listings starting at $1,995
Used BMW M3
44 Great Deals out of 1,626 listings starting at $4,999
Used Honda Accord
944 Great Deals out of 73,528 listings starting at $999

Used Cars for Sale

2019 Ford Mustang For Sale
5 Great Deals out of 16,416 listings starting at $19,000
2018 Ford Mustang For Sale
78 Great Deals out of 4,901 listings starting at $17,991
2017 Ford Mustang For Sale
51 Great Deals out of 2,410 listings starting at $14,197
2016 Ford Mustang For Sale
51 Great Deals out of 2,258 listings starting at $11,900
2015 Ford Mustang For Sale
49 Great Deals out of 1,925 listings starting at $11,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.