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
    Tom Demyan
  • #2
  • #3
    Bob Beaman
View All

Related Models For Sale

Used Chevrolet Camaro
1,085 listings starting at $12,995
Used Chevrolet Corvette
481 listings starting at $9,900
Used Ford Mustang SVT Cobra
1 listings starting at $38,000
Used Ford F-150
551 Great Deals out of 10,128 listings starting at $3,490
Used BMW 3 Series
124 Great Deals out of 2,111 listings starting at $2,495
Used Chevrolet Silverado 1500
163 Great Deals out of 12,136 listings starting at $1,895
Used Jeep Wrangler
101 Great Deals out of 2,162 listings starting at $7,477
Used BMW M3
73 listings starting at $17,950

Used Cars For Sale

2018 Ford Mustang For Sale
145 listings starting at $30,838
2017 Ford Mustang For Sale
331 listings starting at $23,648
2016 Ford Mustang For Sale
112 listings starting at $22,995
2015 Ford Mustang For Sale
91 listings starting at $18,888
2014 Ford Mustang For Sale
97 listings starting at $14,888

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.