The 2011 Impala on the W-body platform with the 3.5L V6 is generally reliable for a fleet-grade sedan, but suffers from specific chronic issues including transmission cooler line failures, engine oil consumption problems requiring major internal work, and front suspension wear that's worse than typical for the platform's age.
Transmission Oil Cooler Line Failure
Common · high severity
Typical onset: 70,000-130,000 mi
Symptoms: Transmission fluid puddle under engine bay, driver's side, Pink or red fluid mixing with coolant in overflow tank, Transmission slipping or delayed engagement after cooler breach, Overheating transmission temp gauge reading
Fix: Replace transmission oil cooler lines (both recommended even if one failed) and flush contaminated coolant or ATF depending on breach direction. If coolant entered transmission, full transmission flush or rebuild may be required. 2-3 hours labor for lines only, 8-12 hours if transmission internals contaminated.
Symptoms: Burning through 1+ quart of oil every 1,000-2,000 miles, Blue smoke from exhaust on startup or acceleration, Fouled spark plugs, misfires on multiple cylinders, Low oil pressure warning at idle when severely depleted
Fix: Requires engine disassembly to replace piston rings, often all pistons done at once. Many techs recommend short block replacement instead given labor overlap and wear on other components at this mileage. 18-24 hours labor for ring job, 16-20 hours for short block swap.
Estimated cost: $3,200-5,500
Front Lower Control Arm Bushing Deterioration
Common · medium severity
Typical onset: 60,000-110,000 mi
Symptoms: Clunking noise over bumps from front end, Steering wander or vague on-center feel, Inner tire wear on front tires, Vibration through steering wheel at highway speeds
Fix: Replace both front lower control arms as complete assemblies (bushings not separately serviceable on most aftermarket parts). Alignment required after replacement. 2.5-3.5 hours labor both sides plus alignment hour.
Estimated cost: $450-750
Intake Manifold Gasket Seepage
Occasional · low severity
Typical onset: 90,000-140,000 mi
Symptoms: Small coolant leak visible below intake manifold, rear of engine, Slight coolant smell from engine bay after driving, Slowly dropping coolant level without external puddles, White residue or dampness on rear cylinder head near firewall
Fix: Replace upper and lower intake manifold gaskets. Access requires removing intake manifold, throttle body, fuel rail. Not a fast job due to tight engine bay on W-body. 4-5 hours labor.
Estimated cost: $550-850
Ignition Lock Cylinder / Key Tumbler Failure
Occasional · medium severity
Symptoms: Key won't turn in ignition or turns with excessive force, Key gets stuck in ignition, won't release, Ignition cylinder rotates but doesn't engage starter, Dashboard warning 'Service Theft Deterrent System'
Fix: Replace ignition lock cylinder assembly, which requires steering column disassembly and special tools to release retaining pin. Must reprogram passlock system to new cylinder. 2-3 hours labor including programming.
Estimated cost: $350-600
Transmission Mount Collapse
Common · low severity
Typical onset: 70,000-120,000 mi
Symptoms: Loud clunk when shifting from Park to Drive or Reverse, Excessive vibration at idle in Drive with brake applied, Visible engine/trans movement when revving in Park, Shudder during acceleration from stop
Fix: Replace transmission mount (and often recommend engine torque strut mount at same visit). Simple job, mount visible from underneath. 1-1.5 hours labor for trans mount alone.
Estimated cost: $180-320
Owner tips
Check transmission cooler lines every oil change for seepage or rust — catching early prevents transmission contamination that costs thousands
Monitor oil consumption religiously after 80k miles; if burning more than 1 quart per 3,000 miles, budget for major engine work
Replace transmission mount and torque strut together around 70-80k mi as preventive — cheap insurance against damaging other drivetrain components
Use Dexos1-spec synthetic oil to help mitigate oil consumption issues on engines not yet showing symptoms
Decent fleet-car value if under 80k miles with documented maintenance, but budget $1,500-2,000 for likely repairs in the first year; avoid high-mileage examples showing oil consumption.
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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Every control module on the 2008-2013 Chevrolet Impala — where it lives, replacement time, and what it takes to program a replacement. Modules marked dealer / factory tool won't work after a part swap alone — budget for programming.
Electric Power Steering Control Module (EPSCM)2.8 hr R&Rdealer / factory tool +0.4 hr▸ programming details
📍 Integrated with steering column assembly, below instrument panel
🔧 Tech 2 or GDS2/MDI with GM SPS2
⚠️ Steering column must be removed for access. VIN programming and steering angle sensor calibration required.
⚠️ Sensor ID relearn required after replacement or tire rotation. BCM stores sensor IDs.
Aftermarket tool coverage varies by software version and vehicle build — treat "aftermarket tool" rows as "usually possible" and verify against your tool maker's coverage list before promising a customer. Spot a wrong location or hour? Tell us — corrections ship fast here.
This defect can affect the safe operation of the airbag system. Until this recall is performed, customers should remove all items from their key rings, leaving only the ignition key. The key fob (if applicable), should also be removed from the key ring.
General Motors LLC (GM) is recalling certain model year 2005-2009 Buick LaCrosse, 2006-2011 Buick Lucerne, 2000-2005 Cadillac DeVille, 2006-2011 Cadillac DTS, 2006-2014 Chevrolet Impala, and 2006-2007 Chevrolet Monte Carlo vehicles. In the affected vehicles, the weight on the key ring and road conditions or some other jarring event may cause the ignition switch to move out of the run position, turning off the engine.
Consequence: If the key is not in the run position, the air bags may not deploy if the vehicle is involved in a crash, increasing the risk of injury. Additionally, a key knocked out of the run position will cause loss of engine power, power steering, and power braking, increasing the risk of a vehicle crash.
Remedy: GM will notify owners, and dealers will install two key rings and an insert in the key slot or a cover over the key head on all ignition keys, free of charge. The recall began on September 23, 2014. Owners may contact General Motors customer service at 1-800-521-7300 (Buick), 1-800-458-8006 (Cadillac), and 1-800-222-1020 (Chevrolet). GM's number for this recall is 14299.
SUSPENSION:FRONT:CONTROL ARM:LOWER ARM · 12V377000
2012-08-03
General Motors (GM) is recalling certain model year 2008-2012 Chevrolet Impala police vehicles because the front lower control arms may fracture. This safety recall does not include non-police Chevrolet Impala vehicles.
Consequence: A broken control arm can result in the loss of control of the vehicle, increasing the risk of a crash.
Remedy: GM will notify owners, and dealers will replace both front lower control arms, free of charge. The safety recall began on August 21, 2012. Owners may contact the Chevrolet owner center at 1-866-694-6546.
Fuel economy (EPA)
City
19mpg
Highway
29mpg
Combined
23mpg
Fuel
Regular Gasoline
Capability & size
EPA class
Large Cars
Wiper blades
9th generation (2006-2013). Sedan body style, no rear wiper.
Size-standard part numbers — verify your connector type before buying. Rear blades are model-specific; check the package's vehicle list.
Fuel economy figures are EPA data via fueleconomy.gov (median across matching trims). Performance figures are compiled estimates for the 2011 Chevrolet Impala 3.5L V6 and can vary by trim.
🔧 Database maintained under the daily editorial review of Chris Hackleman · Master Technician · 20+ years and Jeff Moore · Master Mechanic · 20+ years.