2007 Pontiac G6

The 2007 Pontiac G6 was a mid-size sedan, coupe, and convertible known for its sporty styling and relatively affordable price. Engine options included a 2.4L inline-4 (169 hp, 162 lb-ft of torque), a 3.5L V6 (217-224 hp, 219-220 lb-ft of torque depending on the trim), and a 3.9L V6 (240 hp, 241 lb-ft of torque). Transmission options were a 4-speed automatic (available on I4, 3.5L V6) and a 6-speed automatic (available on 3.9L V6 and some 3.5L V6 models). People generally liked the G6’s styling and handling, but disliked its interior quality and some reliability issues.

Engine

2.4L I4

• Excessive Oil Consumption
  • Description/Symptoms: Burning oil at a higher than normal rate. Blue smoke may be visible from the exhaust. Can lead to low oil levels and potential engine damage.
  • Solution: Could be caused by worn piston rings, valve stem seals, or a faulty PCV valve. Replacement of affected components or engine rebuild.
  • Estimated Cost to Fix: $800 - $3000+
  • Recalls: None Found

3.5L V6

• Intake Manifold Gasket Failure
  • Description/Symptoms: Engine misfires, rough idle, coolant leaks (external), or coolant loss (internal, causing white smoke from exhaust).
  • Solution: Replacement of the intake manifold gasket.
  • Estimated Cost to Fix: $300 - $700
  • Recalls: None Found
• Catalytic Converter Failure
  • Description/Symptoms: Check engine light on (typically P0420 code), reduced engine performance, rattling noise from the exhaust system, failed emissions test.
  • Solution: Replacement of the catalytic converter.
  • Estimated Cost to Fix: $500 - $1200+
  • Recalls: None Found

3.9L V6

• No Issues Found

Transmission

4-Speed Automatic (4T45E)

• Rough Shifting/Slipping
  • Description/Symptoms: Harsh or delayed shifts between gears, slipping out of gear, or failure to shift at all.
  • Solution: Could be caused by low transmission fluid, worn valve body, or internal damage. Transmission flush and fluid change, valve body replacement, or transmission rebuild/replacement.
  • Estimated Cost to Fix: $150 - $3000+
  • Recalls: None Found

6-Speed Automatic (6T70)

• No Issues Found

Suspension

• Front Strut Mount Failure
  • Description/Symptoms: Clunking or popping noise when turning the steering wheel or driving over bumps, poor handling, uneven tire wear.
  • Solution: Replacement of the front strut mounts.
  • Estimated Cost to Fix: $300 - $600
  • Recalls: None Found
• Rear Coil Spring Failure
  • Description/Symptoms: Sagging rear suspension, clunking or squeaking noises from the rear, uneven tire wear, poor handling.
  • Solution: Replacement of the rear coil springs.
  • Estimated Cost to Fix: $300 - $500
  • Recalls: None Found

Electrical

• Ignition Switch Failure
  • Description/Symptoms: Engine stalls, loss of power, difficulty starting the car, accessories not working.
  • Solution: Replacement of the ignition switch.
  • Estimated Cost to Fix: $150 - $400
  • Recalls: 09V112000 - Ignition Switch May Move Out of the Run Position
• Power Window Motor Failure
  • Description/Symptoms: Window moves slowly or not at all, grinding noise when operating the window, window falling into the door.
  • Solution: Replacement of the power window motor.
  • Estimated Cost to Fix: $150 - $400
  • Recalls: None Found

Exterior

• Headlight Condensation
  • Description/Symptoms: Moisture buildup inside the headlight housing.
  • Solution: Removal and resealing of the headlight lens, replacement of the headlight assembly.
  • Estimated Cost to Fix: $100 - $400
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof not opening or closing properly, leaking, or making excessive noise.
  • Solution: Repair or replacement of the sunroof motor, tracks, or seals.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found
• Steering Wheel Controls Malfunctioning
  • Description/Symptoms: Audio controls, cruise control, or other buttons on the steering wheel not working.
  • Solution: Clock spring replacement, switch replacement
  • Estimated Cost to Fix: $150-$500
  • Recalls: None Found

Summary

The 2007 Pontiac G6 has several common issues, ranging from relatively minor electrical and interior problems to more serious engine and transmission concerns. While some issues, like strut mount and coil spring failures, are typical for vehicles of this age, others, like ignition switch and excessive oil consumption, can be more costly to address. The severity of the issues varies, with some requiring immediate attention and others being more of a nuisance. Potential buyers should be aware of these potential problems and factor them into their purchasing decision and budget. The ignition switch recall is important to check if it has been done. The cost to repair these issues could range from a few hundred dollars to several thousand, depending on the specific problem and the extent of the damage.