This service bulletin provides information for maintenance cleaning of the fuel injectors and gasoline detergent additive.
full bulletin at NHTSA ↗2007 Pontiac Grand Prix engine problems
severe 13 complaints filed with NHTSA · avg repair $3,100 · see engine across all vehicles →
Failure mileage
Complaints
13
Recalls
0
Avg fix
$3,100
1crash
2fires
1injury
When does it fail?
Of the 13 engine complaints filed for the 2007 Pontiac Grand Prix, here's the actual mileage breakdown — failures cluster heaviest at 75,000-100,000 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
No new NHTSA engine complaint has been filed on this vehicle in over 7 years — the issue may be aging out of the active population.
Is there a fix? Manufacturer service bulletins
The manufacturer has issued service bulletins covering engine on this vehicle — documented repair instructions, service campaigns, or warranty extensions sent to dealers. A TSB isn't a recall (it's not a free safety remedy), but it's the manufacturer acknowledging the issue and how to fix it.
This bulletin provides information on identifying Non-GM Engine Calibrations for Gasoline Engines using the Tech 2 or GDS 2.
full bulletin at NHTSA ↗This service bulletin provides guidelines and diagnostic/repair information to technicians regarding vehicle engine oil consumption.
full bulletin at NHTSA ↗This service bulletin provides technicians with information to help identify the differences between what is considered a fluid leak, and what is considered fluid seepage.
full bulletin at NHTSA ↗This technical bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should be used to reduce carbon build-up.
full bulletin at NHTSA ↗Source: NHTSA manufacturer communications. Bring the bulletin number to your dealer or shop.
The failure pattern owners describe
Owners report the 2007 Grand Prix stalls without warning at operating temperature—sometimes at highway speeds—even after replacement of the crank position sensor, ignition control module, ignition coils, spark plugs, and thermostat. One owner had the ignition module replaced twice in a week without resolution. Power steering and brakes fail when the engine stalls, creating a documented safety hazard. Multiple owners experienced stalling that could not be reproduced during dealer diagnostic testing, leaving the root cause unidentified.
A separate persistent issue involves codes P0300 (random misfire) and P0420 (catalyst system efficiency) that reappear repeatedly despite replacement of the vehicle computer, ignition coil module (twice), catalytic converter, five sensors, all six fuel injectors, fuel pump, and three major tune-ups. Check engine lights cycle off temporarily but return within days with identical codes.
Two owners reported engine fires—one following a 25 mph collision, another at 65 mph highway speed with smoke under the hood. One owner's engine stalling was traced to a failed engine fuse that failed again about two years later. An owner at 133,000 miles reported oil leaking from the engine with low oil warning illuminated. A cooling fan failed at 176,019 miles after headlight recall repair was completed.
Same Pontiac Grand Prix engine reports on nearby years: 2005 · 2006 · 2008
Failure modes owners describe
Engine stalling at operating temperature
Engine shuts off without warning when warm, even after crank position sensor and ignition control module replacement. Occurs at any speed including highway speeds (55 mph). No check engine light precedes stall. Loss of power steering and brakes during stall creates immediate safety hazard.
When: At operating temperature; multiple instances across different speeds
Symptoms owners cite: Engine stalls without warning; Hard to steer when stalling; Hard to brake when stalling; No warning lights before stall; Occurs when warm at any speed; Stalling at highway speed
Repairs/costs cited: Crank position sensor replaced; ignition control module replaced twice; ignition coils and wires replaced; spark plugs replaced; thermostat replaced; electrical system work per recall 14V400000 performed but parts unavailable to complete repair
Recalls/TSBs owners mention: Complaint filed with Pontiac customer service; recall 14V400000 (electrical system) referenced; repair parts unavailable
Random misfire code P0300 and catalyst system code P0420
Persistent misfire codes that return repeatedly despite extensive replacement of engine components. Check engine light cycles on and off but always returns with same codes. Codes temporarily clear after parts replacement but reappear within days. Multiple shops and dealers unable to identify root cause.
When: Weeks after purchase; ongoing for extended period
Symptoms owners cite: Check engine light illuminates; Check engine light flashes occasionally; Engine codes P0300 and P0420 persist; Rough running/misfire condition
Repairs/costs cited: Vehicle computer replaced; ignition coil module replaced twice; spark plugs replaced; catalytic converter replaced; five sensors replaced; all six fuel injectors replaced; fuel pump replaced; three major tune-ups performed; work performed under warranty and post-warranty; no permanent resolution achieved
Engine fire post-collision
Front end fire following 25 mph front driver's side impact. Fire department extinguished fire. Investigators unable to determine cause due to rear-mounted fuel tank location. Driver sustained concussion and back injury.
When: At 40,000 miles; immediately post-collision
Symptoms owners cite: Front end fire after collision; Smoke under hood
Repairs/costs cited: Vehicle towed; fire extinguished by fire department
Recalls/TSBs owners mention: Manufacturer made aware
Engine fire while driving
Smoke emitted from under hood while driving at 65 mph. Engine caught fire. Owner was able to pull over and exit safely before fire intensified. Owner self-extinguished fire.
When: At 116,300 miles
Symptoms owners cite: Smoke under hood; Engine fire
Repairs/costs cited: Vehicle towed to residence; not repaired
Recalls/TSBs owners mention: Manufacturer not notified
Engine stall due to failed engine fuse
Engine shuts off while driving, accompanied by steering and brake power loss. Issue traced to failed fuse in engine preventing power flow. Same fuse failed again in 2013, requiring replacement a second time.
When: First occurrence around 2011-2012; recurred in 2013
Symptoms owners cite: Engine shuts off; Wheel power loss; Brake power loss; Vehicle will not restart; Intermittent restart capability
Repairs/costs cited: Failed engine fuse replaced; same fuse failed and required replacement again approximately 2 years later
Engine stall with no diagnostic code or reproducible failure
Engine stalls at low speed without warning. Multiple dealer diagnostic visits unable to reproduce or identify failure. Stalling occurs repeatedly but diagnostic testing finds no fault. Problem unpredictable and intermittent, making diagnosis and repair impossible.
When: Multiple instances at 10 mph and 20 mph; mileage 53,973 to 58,300; another instance at 100,000 miles; another at 30 mph with unknown mileage
Symptoms owners cite: Engine stalls at low speed; No warning lights; Intermittent stalling; Cannot be reproduced during diagnostic
Repairs/costs cited: Dealer diagnostic performed multiple times; no failure found; repairs could not be completed
Recalls/TSBs owners mention: Manufacturer notified; no assistance offered
Oil leak from engine
Oil leaking from engine onto engine block detected during routine maintenance. Low oil warning light illuminated on instrument cluster. No recall available; manufacturer offered no assistance.
When: At 133,000 miles
Symptoms owners cite: Oil leaking from engine; Low oil warning light illuminated
Repairs/costs cited: Not repaired; vehicle not taken to dealer
Recalls/TSBs owners mention: Manufacturer notified; no assistance offered as vehicle not covered by recall
Cooling fan failure
Cooling fan failed after vehicle was repaired per headlight recall 15V519000. Failure occurred at 176,019 miles. Not diagnosed or repaired.
When: At 176,019 miles; after exterior lighting repair performed
Symptoms owners cite: Cooling fan failure
Repairs/costs cited: Not diagnosed or repaired
Recalls/TSBs owners mention: Manufacturer made aware
Synthesized from 13 NHTSA owner complaints — unverified consumer allegations, summarized for patterns. The verbatim filings appear below.
What owners are reporting 2 most recent
Random misfire code won't go away since weeks after purchasing my vehicle which was then under warranty. The dealership replaced the car computer & ignition coil module, spark plugs and the code temporarily went away good enough to pass emissions. They also performed the key recall the code keeps coming & no mechanic or dealership can tell me why but they keep taking my money for a temporary…
Tl* the contact owns a 2007 Pontiac grand prix. The contact stated that while driving at 30 MPH, the vehicle stalled. The vehicle was taken to a dealer to be repaired but the failure was unable to be determined. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 100,000.
Had engine trouble with your 2007 Pontiac Grand Prix?
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 2007 Pontiac Grand Prix?
It's a meaningful issue. 13 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 10 complaints that reported odometer mileage, most engine failures cluster between 51,605 and 116,300 miles, with the median around 98,590. A quarter of owners report trouble before 51,605; a quarter make it past 116,300. 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/2007/Pontiac/Grand Prix.
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.