The 1999 Mercury Cougar with the 2.5L Duratec V6 is Ford's CD170 platform—shared with the Contour/Mystique—and suffers from several expensive drivetrain and body integrity issues that make it a risky used buy. Transmission cooler failures and premature engine wear dominate the repair history.
Transmission Oil Cooler Failure / Contamination
Common · high severity
Typical onset: 70,000-120,000 mi
Symptoms: Transmission slipping or erratic shifting, Pink or milky transmission fluid (coolant cross-contamination), Overheating transmission, burnt smell, Sudden loss of forward gears
Fix: The internal radiator-mounted trans cooler corrodes and allows coolant into the ATX fluid, destroying clutches and valve body. Requires transmission rebuild or replacement, radiator replacement, and external cooler install. 8-12 labor hours for full repair.
Estimated cost: $2,200-4,000
Premature Engine Bearing and Piston Failure
Occasional · high severity
Typical onset: 90,000-150,000 mi
Symptoms: Knocking or ticking noise from bottom end, especially on cold start, Low oil pressure warning light at idle, Metal shavings in oil or filter, Sudden loss of power, engine seizure
Fix: The Duratec 2.5L has known issues with main and rod bearing wear, often traced to oil sludge buildup or poor PCV ventilation. Requires complete teardown—short block replacement or full rebuild with pistons, rings, bearings, and machine work. 16-24 labor hours.
Estimated cost: $3,500-6,500
Head Gasket Failure (Both Banks)
Occasional · high severity
Typical onset: 80,000-130,000 mi
Symptoms: White smoke from exhaust, sweet smell, Coolant loss with no visible leaks, Overheating or fluctuating temp gauge, Oil milky on dipstick or cap
Fix: V6 head gaskets fail due to cooling system neglect or thermostat sticking. Both heads must be pulled, decked if warped, and new gaskets/bolts installed. Timing components often replaced simultaneously. 12-16 labor hours.
Estimated cost: $2,000-3,500
Door Latch and Handle Mechanism Failure
Common · medium severity
Symptoms: Door will not open from inside or outside, Handle pulls but latch does not release, Door ajar warning stays on with door closed, Power lock cycling or intermittent operation
Fix: Plastic latch actuators and cable clips break inside the door. Subject to NHTSA recall but parts still fail post-fix. Requires door panel removal and latch assembly replacement per door. 1.5-2.5 labor hours per door.
Estimated cost: $250-450
Transmission Mount Collapse
Common · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Clunking on acceleration or deceleration, Excessive engine/trans movement visible from engine bay, Vibration at idle in Drive, Difficulty shifting into gear
Fix: The rear transmission mount is hydraulic-filled and prone to tearing, allowing excessive drivetrain movement. Replace mount; access is tight and requires subframe support. 2-3 labor hours.
Estimated cost: $300-500
Brake Light Switch and Wiring Faults
Occasional · medium severity
Symptoms: Brake lights stay on continuously, draining battery, Brake lights do not illuminate when pedal pressed, Cruise control inoperative, Gear selector locked in Park
Fix: Recalled switch above brake pedal or corroded connector pins cause intermittent faults. Replace switch and inspect harness for chafing near pedal bracket. 0.8-1.2 labor hours.
Estimated cost: $150-280
Fuel Pump and Filter Clogging
Occasional · medium severity
Typical onset: 80,000-130,000 mi
Symptoms: Hard starting, extended cranking, Stalling at idle or under load, Loss of power on acceleration, surging, Check engine light with fuel trim codes
Fix: In-tank pump fails or filter (integrated into pump module on late '99s) clogs from sediment. Requires fuel tank drop and module replacement. 2.5-3.5 labor hours.
Estimated cost: $450-750
Front Suspension Lower Control Arm Bushing Separation
Occasional · medium severity
Typical onset: 70,000-110,000 mi
Symptoms: Clunking over bumps from front end, Steering wander or pulling to one side, Uneven tire wear on inside edge, Alignment will not hold specs
Fix: Pressed-in bushings in the stamped steel lower control arms tear from road salt and stress. Replace control arms as assemblies (bushings not serviceable separately on most aftermarket parts). 2.5-3.5 labor hours both sides.
Estimated cost: $400-650
Owner tips
Change transmission fluid every 30k miles and install an external cooler immediately to avoid the catastrophic radiator-cooler failure
Use synthetic oil and change every 5k miles—the Duratec 2.5L is intolerant of sludge buildup; inspect PCV valve annually
Inspect door latches during any door panel work; preemptively replace if plastic shows cracks
Replace coolant every 2 years with proper Motorcraft Gold to prevent head gasket and bearing corrosion issues
Hard pass unless it's extremely cheap and you have receipts for a recent trans rebuild and full engine refresh—these are money pits after 100k miles.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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FEDERAL MOGUL IS RECALLING 6,903 AFTERMARKET BALL JOINT ASSEMBLIES SHIPPED BETWEEN NOVEMBER 9, 2007 AND MARCH 26, 2008, WHICH MAY HAVE BEEN PACKAGED WITH INCORRECT NUTS. THE PART NUMBERS PACKAGED WITH INCORRECT NUTS ARE: K7147, K7329, K8683, AND 104353. THESE PARTS WERE MADE FOR USE ON THE VARIOUS VEHICLES LISTED ABOVE.
Consequence: THE NUTS INCLUDED IN THE PACKAGING FOR THESE BALL JOINT ASSEMBLIES ARE MISSING THE INTENDED PREVAILING TORQUE (SELF-LOCKING) FEATURE. IF THE INCORRECT NUT WAS TO BECOME LOOSE, THE JOINING MEMBERS MAY LOOSEN LEADING TO A SEPARATION OF THE BALL JOINT. THIS MAY RESULT IN LOSS OF VEHICLE CONTROL, POSSIBLY RESULTING IN A VEHICLE CRASH.
Remedy: FEDERAL MOGUL WILL NOTIFY OWNERS AND REPLACE THE PARTS FREE OF CHARGE. THE RECALL BEGAN ON MAY 22, 2008. OWNERS CAN CONTACT FEDERAL MOGUL AT 877-489-6659.
SERVICE BRAKES, HYDRAULIC · 06E022000
2006-03-13
CERTAIN AFTERMARKET BRAKE HYDRAULIC MASTER CYLINDERS SOLD AS REPLACEMENT BRAKE CYLINDERS FOR CERTAIN FORD, DAIMLERCHRYSLER, AND JEEP PASSENGER VEHICLES. THESE BRAKE CYLINDERS WERE SOLD UNDER THE BRAND NAMES OF NAPA, RAYBESTOS, AIMCO, AC DELCO, CARQUEST, BENDIX, AND WAGNER. ONLY PRODUCTS THAT WERE MANUFACTURED FROM JULY 27, 2005 THROUGH JANUARY 17, 2006 (DATE CODES 0529 THROUGH 0602) ARE SUBJECT TO THIS RECALL. WHEN SUBJECT TO VERY COLD TEMPERATURES, AN INTERNAL SEAL IN THE MASTER CYLINDER COULD LOSE FLEXIBILITY AND MAY CAUSE BRAKE FLUID TO LEAK.
Consequence: LOSS OF BRAKE FLUID CAN LEAD TO A DECREASE IN BRAKE LINE PRESSURE AND AN INCREASE IN STOPPING DISTANCE, WHICH CAN RESULT IN A VEHICLE CRASH.
Remedy: AFFINIA (BRAKE PARTS, INC.) WILL REPLACE THE SUBJECT BRAKE HYDRAULIC MASTER CYLINDERS FREE OF CHARGE. THE RECALL BEGAN ON MARCH 20, 2006. OWNERS CAN CONTACT AFFINA GROUP CUSTOMER SERVICE AT 1-800-323-0354.
FUEL SYSTEM, GASOLINE · 04V421000
2004-08-30
ON CERTAIN PASSENGER VEHICLES, CONTAMINATION OF THE FILTER IN THE FUEL DELIVERY MODULE (FDM) CAN REDUCE, AND EVENTUALLY BLOCK, THE FLOW OF FUEL TO THE ENGINE.
Consequence: THIS MAY CAUSE ENGINE HESITATION, LOSS OF POWER, SURGING, AND OTHER SIMILAR SYMPTOMS. OVER TIME, THE FILTER MAY BECOME SUFFICIENTLY BLOCKED TO CAUSE THE ENGINE TO STALL, WHICH COULD RESULT IN A CRASH.
Remedy: THIS ACTION IS DEEMED A SAFETY IMPROVEMENT CAMPAIGN AND IS NOT BEING CONDUCTED UNDER THE SAFETY ACT. ALL OWNERS WILL BE NOTIFIED OF THE PROBLEM, AND DEALERS WILL REPLACE THE FDM WITH A NEW DESIGN AT NO CHARGE IF THE OWNER REPORTS THAT THE VEHICLE EXHIBITS ANY OF THE IDENTIFIED SYMPTOMS. THE FREE REPLACEMENT WILL BE AVAILABLE FOR A PERIOD OF 10 YEARS FOLLOWING THE ORIGINAL PURCHASE OF THE VEHICLE, WITH NO MILEAGE LIMIT. THE CAMPAIGN BEGAN ON APRIL 16, 2004. OWNERS SHOULD CONTACT FORD AT 1-800-392-3673.
ELECTRICAL SYSTEM · 01V230000
2001-07-09 · EA01001
ON CERTAIN MY 1996-1998 PASSENGER VEHICLES BUILT AT THE KANSAS CITY, CUAUTITLAN ASSEMBLY PLANTS OR ON MY 1999 PASSENGER VEHCLES BUILT AT THE AUTOMOTIVE ALLIANCE INTERNATIONAL ASSEMBLY PLANTS, THE ROUGH SURFACE OF THE HEATER BLOWER RESISTOR'S STAINLESS STEEL BLADES CAN DAMAGE THE COPPER SURFACE OF THE WIRING HARNESS CONNECTOR. THE DAMAGE COULD, OVER TIME, CAUSE INCREASED RESISTANCE IN THE CONNECTOR AND, DUE TO SUBSEQUENT TERMINAL RELAXATION, RESULT IN AN OPEN CIRCUIT CONDITION.
Consequence: THE OPEN CIRCUIT COULD LEAD TO ELECTRICAL ARCING THAT COULD MELT THE CONNECTOR HOUSING MATERIAL CREASING THE POTENTIAL FOR A FIRE.
Remedy: DEALERS WILL INSTALL A NEW HEATER BLOWER RESISTOR AND A NEW WIRE JUMPER HARNESS. OWNER NOTIFICATION BEGAN AUGUST 29, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT FORD AT 1-800-392-3673.
VEHICLE DESCRIPTION: PASSENGER VEHICLES EQUIPPED WITH 2.5L V6 ENGINES. THE BATTERY CABLE WAS MISROUTED AND ITS ATTACHMENT TO THE ALTERNATOR CABLE WAS UNDER-TORQUED. IF MISROUTED, THE CABLE COULD CONTACT THE POWER STEERING LINE AND THE INSULATION COULD WEAR, RESULTING IN AN ELECTRICAL SHORT.
Consequence: THE SHORT COULD POTENTIALLY RESULT IN A FIRE, STALLING, OR A NO-START CONDITION.
Remedy: DEALERS WILL INSPECT THE BATTERY CABLE TO THE ALTERNATOR FOR DAMAGE AND, IF IT IS DAMAGED, WILL REPLACE THE CABLE. ADDITIONALLY, THE ROUTING OF THE CABLE WILL BE CORRECTED, AS NECESSARY, AND A ROUTING CLIP WILL BE ADDED. ALSO THE TORQUE ON THE ALTERNATOR ATTACHMENT OF THE CABLE WILL BE CHECKED AND, AS REQUIRED, WILL BE TIGHTENED TO SPECIFICATION. OWNER NOTIFICATION BEGAN MARCH 22, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT FORD AT 1-800-392-3673.
EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH · 01V032000
2001-02-06
VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE BRAKE LAMP SWITCH TERMINALS COULD OVERHEAT.
Consequence: THIS COULD CAUSE EITHER A LOSS OF BRAKE LAMP FUNCTION OR CONTINUOUSLY ILLUMINATED BRAKE LAMPS, INCREASING THE RISK OF A CRASH.
Remedy: DEALERS WILL INSTALL A NEW STOP LAMP EXTENSION HARNESS WITH BRONZE TERMINALS AT THE BRAKE LAMP SWITCH CONNECTOR, AND ALSO INSPECT THE BRAKE LAMP SWITCH FOR SIGNS OF OVERHEATING AND REPLACE, AS REQUIRED. OWNER NOTIFICATION BEGAN MARCH 22, 2001. OWNERS WHO TAKE THEIR VEHICLES TO AN AUTHORIZED DEALER ON AN AGREED UPON SERVICE DATE AND DO NOT RECEIVE THE FREE REMEDY WITHIN A REASONABLE TIME SHOULD CONTACT FORD AT 1-800-392-3673.
SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS · 00V075000
2000-03-09
VEHICLE DESCRIPTION: PASSENGER VEHICLES NOT EQUIPPED WITH THE ANTI-LOCK BRAKING SYSTEM (ABS). A PRESSURE CONSCIOUS REDUCING VALVE (PCRV) IN THE REAR BRAKES MAY BE SUBJECT TO CORROSION AND RESULT IN MALFUNCTION, WHEN OPERATED IN AREAS THAT USE SALT COMPOUNDS ON THE ROADWAY FOR DE-ICING OR DUST CONTROL.
Consequence: IF BOTH PCRV'S MALFUNCTION, VEHICLE HANDLING COULD BE ADVERSELY AFFECTED DURING BRAKING AS A RESULT OF THE REAR WHEELS LOCKING, INCREASING THE RISK OF A CRASH.
Remedy: DEALERS WILL INSTALL IMPROVED PCRV'S IN THE REAR BRAKE SYSTEM. THIS RECALL WAS EXPANDED IN SEPTEMBER 2000 TO INCLUDE 1999 AND 2000 FORD CONTOUR, MERCURY MYSTIQUE AND COUGAR VEHICLES.
LATCHES/LOCKS/LINKAGES:DOORS:LATCH · 99V226000
1999-08-18
VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE DOOR LATCH MAY HAVE BEEN MANUFACTURED WITH A LATCH PAWL THAT HAS A COATING WHICH WILL SWELL IN HIGH HUMIDITY CONDITIONS. THE LATCH PAWL MAY THEN STICK IN THE OPEN OR UNLATCHED POSITION.
Consequence: THE DOOR WOULD NOT LATCH WHEN CLOSED. IF THE VEHICLE IS DRIVEN IN THIS CONDITION, IT COULD POTENTIALLY RESULT IN THE DOOR OPENING WHILE THE VEHICLE IS IN MOTION.
Remedy: DEALERS WILL INSTALL A REVISED SIDE DOOR LATCH.
VEHICLE SPEED CONTROL · 99V194000
1999-07-20
VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE ACCELERATOR CABLE MAY HAVE BEEN MANUFACTURED WITH A BURR ON OR NEAR THE END OF THE CABLE SLEEVE INTERIOR. THIS BURR COULD FRAY THE CORE WIRE RESULTING IN THE ACCELERATOR NOT RETURNING TO IDLE WHEN THE ACCELERATOR IS RELEASED.
Consequence: THIS CONDITION CAN RESULT IN THE THROTTLE STICKING, BINDING, OR CAUSING HIGH ENGINE RPM.
Remedy: DEALERS WILL INSTALL A REVISED ACCELERATOR CABLE THAT HAS A FLARED CONDUIT SLEEVE END AND MOLDED ON END FITTING.
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