The last of the New Edge Mustangs before the retro S197 arrived, offered as a base V6 or the GT with a 4.6L 2-valve V8. Money mostly goes to intake manifold cracks, ignition components, and worn suspension bushings, with the V6 cars being cheaper but less desirable.
AI-drafted profile
This failure-mode list was drafted by AI and cross-checked against this car’s real NHTSA complaint data. It has not yet been verified by our mechanics or owners, and it deliberately shows no cost figures: we never publish a dollar amount we can’t source. Own one? Your cost submissions below are what turn this into a verified teardown.
The ownership timeline
this car: 1,900 mi
When things typically happen, in miles. Click a row for the detail.
Bands are typical windows, not predictions. Steel rows are federal complaint clusters (25th-75th percentile of owner-reported failure mileage, median marked). Condition-driven items don’t appear here: inspect for those regardless.
What this car is known for
tap a row for the detail
Rear frame rail / torque box rustInspect for itcost pending›
What you’ll notice: Flaking or perforated metal around rear frame rails and floor, especially on northern cars.
Unibody rear frame rails and torque boxes rust in salt states and are structurally important.
Condition-driven: inspect, don't assume · applies only if found
AI-drafted, unverified · cross-checked against NHTSA complaints · submit what you paid below to verify it
Plastic intake manifold coolant crossover cracks (4.6L)Down the roadcost pending›
What you’ll notice: Coolant leak at the front of the intake, overheating, or coolant loss with no obvious puddle.
The composite intake manifolds on 4.6L 2V engines are known to crack at the coolant crossover, a very common failure on these years.
Typical window: 60k-120k miles
AI-drafted, unverified · cross-checked against NHTSA complaints · submit what you paid below to verify it
8.8 rear axle whine and clunkDown the roadcost pending›
What you’ll notice: Whine on decel, clunk on takeup, or leaking pinion/axle seals.
The solid 8.8 rear axle develops bearing whine and worn clutch packs (Traction-Lok) with age and abuse.
Typical window: 80k-150k miles
AI-drafted, unverified · cross-checked against NHTSA complaints · submit what you paid below to verify it
Rough idle / stalling from IAC and dirty throttle bodyDown the roadcost pending›
What you’ll notice: Erratic idle, surging, or stalling at stops, often tied to the many speed-control complaints.
The idle air control valve and throttle body gum up on these Modular and V6 engines, causing unstable idle and cruise/speed control complaints.
Typical window: 50k-120k miles
AI-drafted, unverified · cross-checked against NHTSA complaints · submit what you paid below to verify it
Coil-on-plug and plug wire failure (V6) / misfireDown the roadcost pending›
What you’ll notice: Misfire, hesitation under load, check engine light with random misfire codes.
Aging ignition components (coils, plug boots) cause misfires common at this mileage on both engines.
Typical window: 70k-130k miles
AI-drafted, unverified · cross-checked against NHTSA complaints · submit what you paid below to verify it
Worn front control arm bushings and strutsDown the roadcost pending›
What you’ll notice: Clunking over bumps, vague steering, uneven front tire wear.
Front control arm bushings and strut mounts wear out and are a routine service item on these cars.
Typical window: 80k-140k miles
AI-drafted, unverified · cross-checked against NHTSA complaints · submit what you paid below to verify it
PPI checklist
AI-drafted for this chassis. Hand it to your inspector.
- 01Pressure test the cooling system and inspect the intake manifold crossover for coolant seepage (4.6L)
- 02Watch a cold start and idle for surging or stalling, then verify cruise control engages and holds
- 03Scan for stored misfire and speed-control related codes
- 04Put it on a lift and check rear frame rails, torque boxes, and floor pans for rust perforation
- 05Grab the front wheels at 6-and-12 to check control arm bushings and ball joints, and inspect strut top mounts
- 06Drive it and listen for rear axle whine on decel and clunk on throttle takeup
- 07On GT cars, feel for clutch chatter and check clutch cable/quadrant engagement point
Ask the seller
- ·Has the intake manifold been replaced or cracked (4.6L GT)?
- ·Any history of overheating or coolant loss?
- ·Has the car lived in a salt-belt state, and can I see underbody photos?
- ·Was it modified or drag-raced, and is the clutch/rear axle original?
Federal defect investigations
NHTSA’s Office of Defects Investigation opens these before any recall exists. All investigations touching this model year are closed.
ENGINE AND ENGINE COOLING
VEHICLE SPEED CONTROL
led to recall 06V108000
VEHICLE SPEED CONTROL
Source: NHTSA ODI investigations file (public federal data).
What owners reported to NHTSA
130 owner complaints and 6 recalls on file for the 2004 FORD MUSTANG (public federal data). Failure mileages come from odometer readings owners filed with NHTSA.
failures cluster 8k-73k mi · median 42k (n=44)
failures cluster 37k-93k mi · median 70k (n=13)
failures cluster 30k-102k mi · median 71k (n=75)
failures cluster 75k-156k mi · median 90k (n=9)
failures cluster 8k-30k mi · median 15k (n=33)
failures cluster 3k-37k mi · median 6k (n=23)
6 recalls. Verify completion with a VIN check
- 09E025000 · EXTERIOR LIGHTING:HEADLIGHTS
DOPE, INC. IS RECALLING 42,540 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES
- 08E050000 · EXTERIOR LIGHTING:HEADLIGHTS
K2 MOTOR IS RECALLING 1,921 AFTERMARKET HEADLAMPS OF VARIOUS MODELS SOLD FOR USE ON THE ABOVE LISTED VEHICLES. THESE HEADLAMPS ARE MISSING THE AMBER SIDE REFLEX REFLECTOR WHICH FAILS TO CONFORM WITH THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES, AND A
- 09E012000 · EXTERIOR LIGHTING
SABERSPORT IS RECALLING 16,270 COMBINATION CORNER AND BUMPER LAMP ASSEMBLIES OF VARIOUS PART NUMBERS SOLD FOR USE AS AFTERMARKET EQUIPMENT FOR VARIOUS PASSENGER VEHICLES. THESE HEADLAMPS FAIL TO CONFORM TO THE REQUIREMENTS OF FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 108, "LAMPS, REFLECTIVE DEVICES
- 06E056000 · FUEL SYSTEM, GASOLINE
CERTAIN AFTERMARKET FUEL FILTERS SOLD UNDER THE PUROLATOR BRAND NAME, P/N F65277, SHIPPED FROM JANUARY 16 THROUGH JUNE 2, 2006, FOR USE ON THE ABOVE LISTED PASSENGER VEHICLES. DUE TO INCORRECT DESIGN, THE QUICK CONNECTORS MAY NOT FULLY SEAT WITH THE TUBE INTERFACE, EVEN THOUGH THE PERSON MAKING THE
- 06V108000 · VEHICLE SPEED CONTROL:ACCELERATOR PEDAL
ON CERTAIN MUSTANG COBRA PASSENGER VEHICLES, THE REAR SURFACE OF THE ACCELERATOR PEDAL MAY COME INTO CONTACT WITH FLOOR CARPETING DURING HEAVY THROTTLE APPLICATION. THE UNIQUE SURFACE PROFILE OF THE ACCELERATOR PEDAL MAY CATCH IN THE CUTOUT ON THE FLOOR CARPETING BEHIND THE ACCELERATOR PEDAL.
- 06E049000 · EXTERIOR LIGHTING
CERTAIN CK MOTORSPORTS COMBINATION HEADLIGHTS, CLEAR CORNER, BUMPER, AND SIDE MARKER LIGHTS SOLD AS REPLACEMENT LAMPS FOR USE ON THE PASSENGER VEHICLES LISTED ABOVE. SOME COMBINATION LAMPS THAT ARE NOT EQUIPPED WITH AMBER SIDE REFLECTORS FAIL TO CONFORM TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO.
33 manufacturer service bulletins on file with NHTSA for this model year.
ENGINE AND ENGINE COOLING (11) · POWER TRAIN (9) · ELECTRICAL SYSTEM (3) · VISIBILITY (3)
Own one of these?
Tell us what a job actually cost you. Submissions are reviewed and folded into the report as owner-reported data. Never auto-published. Have the actual invoice? Upload it here (that’s the gold standard).