Tl* the contact owns a 2005 Chevrolet impala. While driving 15 MPH, the acceleration decreased and the vehicle stalled. The battery warning indicator illuminated. The contact had to maneuver to the side of the road. After five minutes, the contact restarted the vehicle but the failure recurred. The vehicle was left on the side of the road until the next day. The vehicle was driven to an…
2005 Chevrolet Impala engine problems
severe 42 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
42
Recalls
0
Avg fix
$3,100
2crashes
3fires
1injury
When does it fail?
Of the 42 engine complaints filed for the 2005 Chevrolet Impala, here's the actual mileage breakdown — failures cluster heaviest at 150,000+ mi.
0-25k
25-50k
50-75k
75-100k
100-125k
125-150k
150k+
Each bar shows the share of total complaints filed at that mileage range. Peak failure window highlighted. Some owners report problems earlier; some make it well past 150,000 miles symptom-free. Maintenance habits and driving conditions shift the curve as much as mileage alone.
What stands out
Owners have filed 42 engine complaints with NHTSA against this vehicle, but no formal recall covers the issue — the federal record reflects what manufacturers have admitted, not everything owners are reporting.
No new NHTSA engine complaint has been filed on this vehicle in over 10 years — the issue may be aging out of the active population.
The failure pattern owners describe
Buyer takeaway: 2005 Impalas show a pattern of catastrophic engine and transmission failures across multiple systems—stalling, overheating, fuel leaks, and hard transmission shifts recur even after repairs. Multiple owners report replacing engines, transmissions, and cooling components multiple times on the same vehicle with issues returning, making long-term ownership costly and potentially unsafe.
Owners describe an Impala prone to sudden stalling at any speed, often in traffic, sometimes requiring multiple restart attempts—and one case ended with another vehicle hitting the Impala in an intersection. Battery warning lights and power loss are common companions to the stalling. The transmission shifts hard, shudders at stops and turns, and has failed completely in multiple cases; one owner had a second transmission installed and experienced the same problem again.
Coolant system failures dominate the complaints. Engines overheat repeatedly, temperature gauges malfunction wildly or freeze, and water pumps, radiators, head gaskets, and intake manifold gaskets fail and must be replaced—often multiple times on a single vehicle. One owner replaced the head gasket and water pump three times each before giving up. Dex-Cool coolant turns to brown sludge, clogging systems. Fuel filters fail, spraying gasoline on the underbody; fuel smells during operation and leaks occur. Speedometers stop working or read wildly inaccurate. Ignition switches fail; engines develop rod knock and seizure; one vehicle caught fire after overheating. The costs mount fast—transmission replacements alone run thousands, cooling system work hundreds, and labor adds up after the third or fourth repair for the same failure.
Same Chevrolet Impala engine reports on nearby years: 2006 · 2007 · 2008
Failure modes owners describe
Engine stalling and power loss
Vehicle stalls or loses power abruptly during normal driving, at traffic lights, during acceleration, or at various speeds. Power loss has resulted in loss of control and collision. Multiple restart attempts sometimes required before vehicle restarts.
When: Various mileages from 49,000 to 294,000 miles; reported across different driving conditions
Symptoms owners cite: Sudden stall at low and highway speeds; Loss of power without warning; Battery warning indicator illuminates; Multiple restart attempts required; Acceleration decreases before stall; Engine shuts off in intersection
Codes mentioned: C1218, P1811
Repairs/costs cited: Ignition switch replaced in one case but failure persisted; body control module replacement suggested; throttle plate carbon buildup cleaned in another case
Recalls/TSBs owners mention: NHTSA recall campaign 14V400000 (Electrical System) issued; Chevrolet told some owners the problem was not covered and no assistance offered
Transmission hard shifting and shudder
Transmission exhibits harsh shifts between gears, shuddering, jerking, and delayed acceleration response. Some owners report transmission fluid low or transmission solenoid issues. Multiple transmission replacements reported on the same vehicle.
When: 95,000 to 170,000+ miles; recurring after transmission repair/replacement
Symptoms owners cite: Hard shifting between gears; Shuddering at stop lights and during turns; Delayed acceleration from complete stop; Violent jerking when accelerating; Transmission shifts better when air conditioning is on; Sluggish pull from red light
Codes mentioned: P1811
Repairs/costs cited: Transmission replaced; transmission fluid topped with additive; transmission solenoid replacement suggested as alternative to full transmission replacement; second transmission installed with same shifting problems recurring
Engine overheating and coolant leaks
Engine coolant system fails repeatedly with overheating, leaks, and gauge malfunctions. Coolant system components (radiator, water pump, hoses, head gasket) fail and require replacement. Dex-Cool coolant turns to corrosive sludge causing system damage and clogging.
When: 62,000 to 175,000+ miles; some failures occur early in ownership
Symptoms owners cite: Temperature gauge reads hot or fluctuates wildly; Vehicle overheats while driving; Coolant leaks; Whistling noise after long drives; Fuel smell when heat turned on; Engine catches fire; Dex-Cool turns from orange to brown corrosive sludge
Repairs/costs cited: Head gasket replaced three times in one case; water pump replaced three times in one case; radiator replaced; plastic elbow from water pump to radiator replaced ($300); intake manifold gaskets leak; heater core clogged; hoses deteriorate
Recalls/TSBs owners mention: Warranty company refused to pay for coolant diagnostics; Chevrolet stated vehicle was not recalled and offered no assistance; some owners told problem was coolant-related but issue recurred
Fuel system failure and fuel leaks
Fuel filter fails causing fuel spray onto vehicle underbody; fuel smell during operation; fuel gauge drops rapidly during driving; fuel loss when car is running; fuel gasket missing.
When: 175,555 miles reported for one case; at various mileages
Symptoms owners cite: Fuel smell inside and outside vehicle; Fuel loss while engine running; Rough start and engine missing; Fuel gauge drops by lines while driving; Fire hazard due to fuel spill on underbody
Repairs/costs cited: Fuel filter replaced; fuel filter o-rings replaced; fuel line gasket missing ($280 to repair); serpentine belt tensioner broke and replaced; serpentine belt replaced ($300)
Instrument cluster malfunction
Speedometer fails or reads inaccurately; temperature gauge malfunctions; warning lights malfunction; instrument cluster loses power or reads inconsistently.
When: 39,000 to 294,000+ miles; some failures after one year of ownership
Symptoms owners cite: Speedometer stops working or reads inaccurately (reads 100 MPH at 30 MPH); Temperature gauge swings wildly or shows no reading; Warning lights illuminate intermittently; All lights on instrumental panel illuminate during stall
Repairs/costs cited: Temperature gauge repaired but warning light continued; speedometer replacement needed ($700); no repairs completed in some cases
Recalls/TSBs owners mention: Mechanics report knowing about 2004-2006 GM vehicle speedometer problem but no recall issued
Ignition and starting failure
Vehicle does not start on first attempt; requires multiple key turns; intermittent no-start condition; vehicle shuts down while driving due to ignition switch failure.
When: 115,000 to 129,000+ miles; recurring from January through June in one case
Symptoms owners cite: Vehicle will not turn on initially; Multiple start attempts required; Intermittent no-start condition; Vehicle shuts down while driving; Vehicle can be restarted but issue recurs
Repairs/costs cited: Ignition switch replaced in one case but failure persisted
Engine mechanical failure
Engine develops internal damage, rod knock, and mechanical failure requiring engine replacement. Engine block seizes after oil changes. Engine catches fire.
When: At 235 miles (rocker pivot arm), 96,542 miles (rod failure), early in vehicle life
Symptoms owners cite: Engine noise and rod knock; Engine block seizes; Rough running; Vehicle stalls at stop light; Engine fire; Loud boom before fire
Repairs/costs cited: Engine replaced at 12/27/11 (rod failure); entire engine replaced on second purchase; rocker pivot arm broken on new vehicle with 235 miles
Serpentine belt failure
Serpentine belt tensioner breaks and belt fails, creating squealing sound at startup and risk of complete belt failure.
When: 175,555 miles
Symptoms owners cite: Squealing belt sound at startup; Tensioner broken
Repairs/costs cited: Serpentine belt tensioner replaced; serpentine belt replaced ($300)
Synthesized from 42 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 4 most recent
The speedometer just stopped working, the transmission shift hard but when you shut off the engine and start it back up it stops shifting hard, and the car stalls. *kb
My complaint is about a 2005 impala. When I start the car in the morning and I turn on the heat I smell gasoline fumes inside the car. I call gm and I was directed to take the vehicle to superior Chevrolet. They told me the problem was with the coolant. It cost me $90.00. The problem returned a week later after I have had the file to case closed. The caseworker was ms glasko. *tr
My car just lost all power so I coasted to a stop. I smelled smoke and saw it coming from under the hood. The car started on fire and was a total loss. *tr
Had engine trouble with your 2005 Chevrolet Impala?
File a complaint with NHTSA → It's free, official, and how every report above got here — owner filings are the federal safety record this page is built on.
Common questions
How serious is the engine problem on the 2005 Chevrolet Impala?
It's a meaningful issue. 42 complaints have been filed and the failure mode causes operational problems for owners. Repairs average $3,100.
At what mileage does the engine typically fail?
Across the 31 complaints that reported odometer mileage, most engine failures cluster between 50,000 and 140,000 miles, with the median around 98,000. A quarter of owners report trouble before 50,000; a quarter make it past 140,000. Maintenance history matters more than the odometer alone — this is the reported failure window, not a guarantee.
What does it cost to fix?
Independent shops typically charge around $3,100 for engine repairs on this vehicle. Dealer pricing tends to run 20-40% higher. The exact figure depends on the specific failure mode, parts availability, and your local labor rates. If you're outside factory warranty, an extended service contract often covers this category.
Are there any recalls related to engine?
No active recalls currently cover engine issues on this vehicle. The complaints filed represent owner-reported failures that haven't risen to the level of a manufacturer-issued recall — but they're still worth knowing about before you buy or budget for repairs.
Related
Complaint and recall data sourced from the National Highway Traffic Safety Administration (NHTSA)
public records database. Verify the raw federal record at
nhtsa.gov/vehicle/2005/Chevrolet/Impala.
Severity ratings are derived from reported crashes, fires, injuries, and fatalities. Repair cost estimates are
independent-shop national averages and may differ in your area. Some links on this page are affiliate links.