The 2007 Commander shares the WK platform with the Grand Cherokee and brings typical Chrysler transmission/electrical gremlins plus some engine-specific nightmares, particularly catastrophic 3.7L failures and transfer case drama.
3.7L V6 Catastrophic Engine Failure (Dropped Valve Seats)
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: Sudden loss of power and horrible metallic noise, Misfire codes on multiple cylinders, Coolant mixing with oil, Complete engine seizure in worst cases
Fix: The 3.7L PowerTech is notorious for valve seat recession and dropping seats into cylinders, destroying pistons, cylinder walls, and valves. Requires full engine replacement or rebuild with updated heads. 18-25 labor hours for used engine swap, 30-40+ for proper rebuild.
Estimated cost: $3,500-7,000
545RFE Transmission Overdrive Failure and Cooler Line Leaks
Common · high severityTypical onset: 90,000-130,000 mi
Symptoms: No 5th gear/overdrive, stuck in 4th, Harsh 4-5 or 5-4 shifts before failure, Red fluid pooling under vehicle from cooler lines, Limp mode with P0750 or P0735 codes
Fix: Overdrive solenoid pack and clutch failures are endemic. Cooler lines at radiator corrode and blow out. Solenoid replacement 4-6 hours if caught early; full rebuild 12-16 hours. Cooler lines 2-3 hours but often discovered after fluid loss causes transmission damage.
Estimated cost: $800-1,200 for cooler lines; $2,800-4,200 for rebuild
Transfer Case (NV140/NV145) Chain Stretch and Failure
Occasional · high severityTypical onset: 100,000-150,000 mi
Symptoms: Grinding/rattling from center of vehicle on acceleration, Jumping out of 4WD or unable to engage, Metal shavings in transfer case fluid, Vibration at highway speeds
Fix: Chain stretches, eats the case, and grenades if ignored. Requires transfer case rebuild or replacement. 8-12 labor hours. This was recall-covered for some VINs but many missed the window.
Estimated cost: $1,800-3,200
TIPM (Totally Integrated Power Module) Failure
Common · medium severitySymptoms: Fuel pump relay cycling causes no-start or stalling while driving, Wipers/windows/locks operate on their own, Gauges going haywire, Multiple electrical gremlins with no pattern
Fix: The TIPM is Chrysler's Achilles heel 2007-2016. Fuel pump relay is most dangerous (stalling in traffic). Dealer reflash helps temporarily but module replacement is the real fix. 2-3 labor hours but part is expensive.
Estimated cost: $800-1,400
Front Lower Control Arm Bushing Failure
Common · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Clunking over bumps from front end, Wandering steering and poor highway tracking, Uneven/cupped tire wear on inside edge, Alignment won't hold
Fix: Rear bushings on lower control arms deteriorate, causing alignment issues. Requires full control arm replacement (bushings not sold separately for most applications). 3-4 labor hours per side, alignment adds 1 hour.
Estimated cost: $600-900 both sides with alignment
Rear Differential Pinion Seal and Bearing Failure
Occasional · medium severityTypical onset: 90,000-140,000 mi
Symptoms: Gear oil dripping from front of differential, Whining or howling from rear on deceleration, Vibration at 40-60 mph that changes with load
Fix: Pinion seal leaks are common but if ignored the bearing goes and takes out gears. Seal replacement 2-3 hours, full rebuild if bearing damaged 6-10 hours. Fluid service every 30k helps prevent this.
Estimated cost: $400-700 for seal; $1,400-2,200 for rebuild
Ignition Switch Failure (Recall 11V220000)
Occasional · high severitySymptoms: Key won't turn or turns but no crank, Engine shuts off while driving, Accessories cut out intermittently, WIN (Wireless Ignition Node) communication faults
Fix: Covered under recall but many owners never got it done. Switch overheats and fails. 1.5-2.5 labor hours including steering column disassembly. Check if recall was completed before buying.
Estimated cost: $300-500 if not recall-covered
4.7L V8 Valve Seat Cracking (Less Common Than 3.7L)
Rare · high severityTypical onset: 120,000-180,000 mi
Symptoms: Cylinder misfire that progressively worsens, Loss of compression on one or more cylinders, Metallic ticking that becomes knocking
Fix: The 4.7L can also drop valve seats but far less frequently than the 3.7L. Requires head removal and machine work or replacement. 14-18 labor hours for both heads.
Estimated cost: $2,500-4,000
Buy the 5.7L Hemi or 4.7L V8 only, avoid the 3.7L entirely, and expect $2k-3k in deferred maintenance on any high-miler—solid truck otherwise if you wrench or have a trusted indie shop.
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.