2007 Buick Allure

The 2007 Buick Allure (also sold as the LaCrosse in the US) is a comfortable, mid-size sedan known for its smooth ride and spacious interior. Engine options included a 3.8L Series III V6 (200 hp, 230 lb-ft torque), a 3.6L DOHC V6 (240 hp, 225 lb-ft torque), and a 3.8L Supercharged Series III V6 (240 hp, 280 lb-ft torque). All engines were paired with a 4T65E 4-speed automatic transmission. Owners generally appreciate the car’s quiet cabin and comfortable seats. Common dislikes include its somewhat bland styling and average fuel economy for the segment.

Engine

3.8L Series III V6

• Intake Manifold Gasket Failure
  • Description/Symptoms: Coolant leaks externally from the intake manifold gasket area, often near the front or rear of the engine. This can lead to overheating and low coolant levels.
  • Solution: Replace the intake manifold gasket with an updated design.
  • Estimated Cost to Fix: $300 - $600
• Lower Intake Manifold Coolant Elbow Leak
  • Description/Symptoms: Coolant leaks from the plastic elbows connecting the lower intake manifold to the engine block. These elbows can become brittle with age and crack, causing coolant loss and potential overheating.
  • Solution: Replace the plastic elbows with upgraded aluminum elbows.
  • Estimated Cost to Fix: $100 - $300
• Oil Leaks (Valve Cover Gaskets, Oil Pan Gasket)
  • Description/Symptoms: Oil leaks from various gasket surfaces, particularly the valve cover gaskets and the oil pan gasket.
  • Solution: Replace the leaking gaskets.
  • Estimated Cost to Fix: Valve Cover Gaskets: $100 - $250; Oil Pan Gasket: $200 - $400

3.6L DOHC V6

• Timing Chain Wear/Failure
  • Description/Symptoms: Rattling noise from the engine, especially on startup. Engine may run rough, misfire, and trigger a check engine light with codes related to timing issues. This is a more significant issue on early versions of the 3.6L.
  • Solution: Replace the timing chain, guides, and tensioners.
  • Estimated Cost to Fix: $1000 - $2000+
  • Recalls: None Found
• High-Pressure Fuel Pump Failure
  • Description/Symptoms: Engine stalling, difficulty starting, rough idling.
  • Solution: Replace the high-pressure fuel pump.
  • Estimated Cost to Fix: $400 - $700

3.8L Supercharged Series III V6

• Supercharger Oil Leak
  • Description/Symptoms: Oil leaking from the supercharger snout or casing. This can lead to decreased supercharger performance.
  • Solution: Rebuild or replace the supercharger, including replacing seals and bearings.
  • Estimated Cost to Fix: $800 - $2000+

Transmission

4T65E 4-Speed Automatic (All Engine Options)

• Torque Converter Clutch (TCC) Failure
  • Description/Symptoms: Shuddering or vibration at highway speeds when the torque converter is supposed to lock up. Can also cause hard shifting or stalling.
  • Solution: Replace the torque converter.
  • Estimated Cost to Fix: $500 - $1000
  • Recalls: None Found
• Shift Solenoid Failure
  • Description/Symptoms: Erratic shifting, failure to shift into certain gears, or harsh shifting.
  • Solution: Replace the faulty shift solenoid(s).
  • Estimated Cost to Fix: $200 - $500
• Valve Body Issues
  • Description/Symptoms: Poor shift quality, slipping, or failure to shift at all.
  • Solution: Remove and clean the valve body, or if damaged, replace it.
  • Estimated Cost to Fix: $400 - $800

Suspension

• Strut Mount Failure
  • Description/Symptoms: Clunking or rattling noise from the front or rear suspension, especially when going over bumps.
  • Solution: Replace the strut mounts.
  • Estimated Cost to Fix: $200 - $500 per pair.
  • Recalls: None Found
• Sway Bar Link Failure
  • Description/Symptoms: Clunking or rattling noise from the front or rear suspension, especially when turning.
  • Solution: Replace the sway bar links.
  • Estimated Cost to Fix: $100 - $300 per pair.
    • Recalls: None Found

Electrical

• Power Window Regulator Failure
  • Description/Symptoms: Window moves slowly, erratically, or not at all.
  • Solution: Replace the power window regulator.
  • Estimated Cost to Fix: $200 - $400 per window.
  • Recalls: None Found
• Instrument Panel Cluster Issues
  • Description/Symptoms: Intermittent or complete failure of gauges, displays, or backlighting in the instrument cluster.
  • Solution: Repair or replace the instrument panel cluster.
  • Estimated Cost to Fix: $200 - $600
  • Recalls: None Found
• Door Lock Actuator Failure
  • Description/Symptoms: One or more door locks failing to lock or unlock with the remote or power lock switch.
  • Solution: Replace the faulty door lock actuator
  • Estimated Cost to Fix: $150 - $350

Exterior

• Headlight Housing Clouding/Yellowing
  • Description/Symptoms: Headlight lenses become cloudy or yellowed, reducing headlight output.
  • Solution: Polish the headlight lenses or replace the headlight assemblies.
  • Estimated Cost to Fix: Polishing $50-$100, Replacement $200-$500+
  • Recalls: None Found

Interior

• Sun Visor Sagging/Breaking
  • Description/Symptoms: The sun visor sags down or the hinge breaks, preventing it from staying in position.
  • Solution: Replace the sun visor.
  • Estimated Cost to Fix: $50 - $150
  • Recalls: None Found

Summary

The 2007 Buick Allure has a mix of potential issues. Engine problems can range from relatively minor (intake manifold leaks on the 3.8L) to more significant (timing chain wear on the 3.6L). Transmission issues with the 4T65E are also common across all engine options. Suspension and electrical problems are fairly typical for a car of this age. The severity and cost of repairs vary, but owners should be prepared for potential expenses ranging from a few hundred dollars for minor repairs to over $1000 for major engine or transmission work.