How many miles is too many!?


Mar 29, 2012
Hi guys,

I've always wanted a 99-04 mustang. We'll i found the exact one I'm looking for the only issue is the milage on the car. It appears to be very well kept but it has 130k+ miles. How strong are the 4.6L? Any common issues/replacement/service intervals to look for?
  • Sponsors(?)


Nov 20, 2011
i got mine knowing nothing about mustangs, wish i got a pi motor or paid more for a cobra now, but the 4.6 is used in crown vic police cars and taxi's that are constantly beat on and they depend on them, got mine with 140k cus it was a good price and all it needed was motor mounts, hit 150k and the rear main seal just broke so i gotta replace that. overall, to they seem to be strong and durable, if its what you want then its worth it.


Mar 29, 2012
That makes sense Ford would do that, but i didnt put that together. I live in a city and havve been in many crown vic, old cop car turned to cabbies. Seeing how they drive them and the tough miles they put on them is a bit more assuring


SN Certified Technician
Aug 14, 2009
Houston Texas
The timing chains gave way on my 2000 GT at 145k miles. This set off a cascade failure that created a boat anchor. Some model years are more prone to this problem. It's also affected by maintenance (quality of oil).

Some ppl report no visible signs of wear on the timing chain adjuster at 150k and others report all plastic gone and down to metal. The plastic is important because it ends up clogging the oil pick up.

An oil filter cutter offers a way to screen for this failure.

Broken motor mounts is another common issue.


chicks make me feel inadequate
Founding Member
Jul 30, 2002
South Texas
As stated, the lowly 2v 4.6, while not the shining gem of the modular family power-wise (2v, 3v, 4v, 4.6-5.4-6.8), is an extremely durable engine. Police departments and taxi companies can attest to that. I see plenty of oil field company trucks with these engines as well and they all take a beating.

As with any engine, seals, gaskets and hoses don't last forever so expect some leaks on a 10+ year old car. Other than that mileage doesn't really phase them. I've changed the plugs on an old 2v 5.4 with 255,000+ miles and the thing was still running well. In the 10 years i've had my 'o2 the ONLY things i've replaced were the driver's window and a leaking ABS control module. Maintenance stuff aside that's literally ALL i've replaced. Not bad for 10 years and 75k


man bewbs please...
Mar 23, 2007
Pacific NW
I would rather buy a car with 130K highway miles than one with 25K city miles. It all depends on how it was used and serviced. It may be that at 130K it is just getting broke in, or it may already be worn out. How was it driven, how was it serviced, those are the two biggest questions that need to be answered.


Founding Member
Dec 11, 2001
Olathe KS
My 97 GT just ticked over 200k and I wouldn't hesitate to take it across the country. In fact, last fall I took it to Colorado and got 27+mpg in the mountains. The car still feels solid with this many miles, I even have AC! (knocks on wood).

I did replace the chain guides around 175k miles. They had some moderate wear, but it was just as much an excuse to swap in PI cams as checking the guides. ;) If you maintain the car well, and take care of issues before they become a big problem, the car will last nearly forever. It is when people decide to stop maintaining that the major issues crop up. In police and taxi service, it is common for these engines to rack up 3-400k miles.

I personally think maintenance is more important than driving the car hard. Nearly every time I drive the car, it gets spun to red line at least a couple times. I somewhat regularly go to the track and it still runs stronger than ever.



Mar 29, 2012
I agree with maintance over miles, high highway over low city miles. My Grand cherokee has 223k and drives great but i also take good care of her. But some cars are just built like sh*t and wont get over 150k even if they are maintained to the T.

As Bullitt said how it was driven also.... concerns me? Being a sports car i think a lot of people tend to beat on them. I think the occational rev is good, clean out that carbon ;) but I had a friend who worked for Cadillac he told me horror stories about the northstar engines being all gouped up because its a race engine and the 90year old owner never went over 30mph!


Active Member
Jun 12, 2006
Palm Harbor, FL
Mine is about to tick over 150k miles. Been boosted since 130k. Major issues for me, been through 2 clutches, motor mounts, rack bushings, intake manifold, rear carrier bearings, blown out spark plugs and 3 frozen rear caliper brackets.

Not much considering I fixed them all correctly the first time. I've had the car almost 7 years and 100k miles now. It is my daily driver, I change the oil regularly and same with all other fluids..fix something the right way and it'll last a long time for you!


Mar 11, 2012
Dayton, VA
Mustangs last forever... I got mine with 109k on it and it had about 140k when it was totaled and still ran amazing, people could never believe it had that many miles on it. No leaks anywhere and the only one I fixed was an axle seal(they are kind of bad for that). If it hasn't been treated like :poo: it's probably good to go a hell of a lot more miles and even if it has been it still probably is unless you're real unlucky. A lot of my miles were pretty hard miles, I had fun with that car. I worked with another tech at our Ford dealer that had an 03 with about 220k pretty much same story all around.

One big big suggestion though is to replace the spark plugs when you get it... They blow them out a lot and nobody I know has ever seen one blow out a factory plug so I don't know if people change them hot or just don't torque them right or what... I do know that mine blew one out and made me afraid to mess with them and then it blew another one and so then I replaced them all after that and never had another problem.


Oct 27, 2011
Hi guys,

I've always wanted a 99-04 mustang. We'll i found the exact one I'm looking for the only issue is the milage on the car. It appears to be very well kept but it has 130k+ miles. How strong are the 4.6L? Any common issues/replacement/service intervals to look for?
As far as the Modular engines the 4.6 is a very good engine. As the other guys have said it all depends on how it was drove before you owned it. The engine itself is powerful and you can make some serious power with it, but as a stock engine the magic number of HP is 450 mostly because of the rotating assymbaly (aside from the crank rated to 600HP).

As a stock engine N/A it will come to about 250HP even with high milage. Some problems you may run into are things like the CATs will get plugged up after a long time on high octane gas. Also you might run into a problem with your MAF getting dirty and not reading correctly. Even more so if you have a cold air intake. The bigest problems that this year model had, but mostly in the F-150s were that the spark plugs would blow out of the head. That was due to the fact that when the heads were machined and assembled, some how the spark plug ports werent threaded correctly. Thats about the extent for problems you may run into on easy run Modular engines. Harder run engines of course you could have more problems.

If you are into the power gain and want to beef up your poney power then the best 2 ways are: 1. Purchase a Kenne Belle 2.1 L intercooled supercharger kit. This kit does not come with everything you need so if you puschase it you will need a complete parts list to make it all work. This supercharger is manufactured ti fit and be completely compatible with your stock engine aside from a few extras but nothing major. 2. Bolt ons such as heads, stage 1 cams, intake manifold, and headers ect.

Any more questions just ask.


Aug 15, 2012
too many miles happens when a rod/bearing lets go or a piston breaks up. lol. my dad has a 94 tbird 4.6 with 260k and its still a champion. the trannys suck but the motor is nice


Mar 16, 2009
Atlanta Georgia
I have 150k and i have cams gears longtubes, 4.30's and nitrous revving to 6500 at the track... theyre pretty stout motors, but maintenance is key
Thread starter Similar threads Forum Replies Date
B is 29,000 miles too many? 2005 - 2014 S-197 Mustang -General/Talk- 31
StreetDreamsGT Buying a stang, is 160k too many miles? And help with a cut wire. Fox 5.0 Mustang Tech 14
nine2oneGT How many miles is too many?? SN95 4.6L Mustang Tech 7
M Too many miles to start modding? 1996 - 2004 SN95 Mustang -General/Talk- 20
M is this too many miles Fox 5.0 Mustang Tech 3
TheCrazy1 Too many miles to supercharge? SVT Tech Forum 6
9 Too many miles..? 1996 - 2004 SN95 Mustang -General/Talk- 2
B How many miles is too many? 1996 - 2004 SN95 Mustang -General/Talk- 14
abouttobeglue 75000 too many miles for cams? SN95 4.6L Mustang Tech 8
A How Many miles is too many miles to s/c?? SN95 4.6L Mustang Tech 2
Nvidia When is too many miles "too much"? Fox 5.0 Mustang Tech 4
1994Vib.RedGT how many miles is too much for a used intake 1994 - 1995 Specific Tech 4
B How many miles are too high to start modding? SN95 4.6L Mustang Tech 7
EXTRPR50 150K TOO MANY MILES? Fox 5.0 Mustang Tech 13
92j3ieje8 How many miles is an oil change needed for a v6 o4 mustang? 1996 - 2004 SN95 Mustang -General/Talk- 0
S how many miles can I get out of a 2007 4.0 liter engine? 2005 - 2014 S-197 Mustang -General/Talk- 3
P For Sale 1996 Vortech Supercharged Cobra Convertible 80K Miles for sale - many upgrades - $10,500 SN95 Mustangs For Sale (1994-04) 1
M How many miles can a 4.6 last?? 1996 - 2004 SN95 Mustang -General/Talk- 1
Deborah Vaughn Expired 2008 Mustang Gt 4.6l V8 / 11,103 Miles / With Many Upgrades S197 Mustangs For Sale (2005-14) 0
Mustang5L5 How Many Miles Are On Your Fox Mustang? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 40
jdetten12 How Many Miles Out Of A 98 Gt Can You Get 1996 - 2004 SN95 Mustang -General/Talk- 4
B How Many Miles Can I Expect From Goodyear F1 Supercar Tires? 2005 - 2014 S-197 Mustang -General/Talk- 3
J 02 V6 (how Many Miles Can I Expect To Get From The Motor)? SN95 V6 Mustang Tech 2
motley 1990 Mustang GT 63k original miles AFR heads and many other upgrades Fox Body Mustangs For Sale (1979-93) 0
Legacy5.0 The official "How many miles does your Fox have?" thread... 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 63
prae_21 How many miles did fellow GT owners get from their stock Pirelli 18" tires? 2005 - 2014 S-197 Mustang -General/Talk- 13
C KENNE BELL SUPERCHAGED 99 COBRA!!!!MUST SELL ASAP!!!15,000 OBO!!!59K MILE!!!MANY MODS SN95 Mustangs For Sale (1994-04) 8
CBus 06 GT How many miles on your S197, total and yearly 2005 - 2009 Specific Tech 59
B How many Miles on your 5.0 when you picked it up? 2010 - 2014 Specific Tech 86
B How many miles you do with full tank?? 1996 - 2004 SN95 Mustang -General/Talk- 24
D tire suggestions and how many miles did you pirrelli's last? 2005 - 2009 Specific Tech 16
NotQuik how many miles... 2005 - 2014 S-197 Mustang -General/Talk- 18
juiced_94gt How many miles during break in before I can drive on the freeway??? 1994 - 1995 Specific Tech 11
fiveoho how many miles are on your 99-04? 1996 - 2004 SN95 Mustang -General/Talk- 198
xtweakerx how many miles before re-charging or replacing filter 2005 - 2009 Specific Tech 3
BlueOvalStangGT OFFICIAL: How many miles are on your 94-95 Mustang? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 49
9 How many miles on your S197? 2005 - 2014 S-197 Mustang -General/Talk- 59
jmoore16 Poll for GT500 Owners? How many miles so far? 2007 - 2014 Shelby GT500 Tech 18
S how many miles are fords 5.0s good for? Fox 5.0 Mustang Tech 15
badstang123 How many miles do you have on your CHP or DSS Longblock? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 1
1987stangman How many miles have you got off your stock Fox clutch? Fox 5.0 Mustang Tech 15
94GTMOOSE how many people have recently had there car hit 100,000 miles. 1994 - 1995 Specific Tech 28
B how many miles will a 5.0 last?? 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 60
berns82 How many miles do you drive weekly? 1996 - 2004 SN95 Mustang -General/Talk- 12
L How many of you are running modded motors wit HIGH Miles? Fox 5.0 Mustang Tech 12
cryptic How many miles, 1996 - 2004 SN95 Mustang -General/Talk- 40
T How Many Miles 1994 - 1995 Specific Tech 25
QU!CK How Many Miles On Your Gears? SN95 4.6L Mustang Tech 19
dmaxstang Curious, How many miles do you have now? 2005 - 2014 S-197 Mustang -General/Talk- 30
slvrbullit302 How many miles.... 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk- 27
Similar threads