2007 Buick LaCrosse

2007 Buick LaCrosse

Overview

The 2007 Buick LaCrosse, a mid-size sedan, offered a comfortable ride and a refined interior for its time. It was available with a choice of two V6 engines, catering to different performance and efficiency preferences. While generally considered a reliable vehicle for its era, like any car, it has specific areas where owners have reported issues. This analysis focuses on common mechanical and electrical problems, excluding routine maintenance, to provide a clear picture of potential reliability concerns for prospective buyers or current owners.

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Engine

3.8L V6

Intake Manifold Gasket Leak

• Symptoms: Coolant leaks, engine overheating, sweet smell from engine bay.
• Solution: Replacement of the intake manifold gaskets.
• Cost: $400 - $700

EGR Valve Clogging

• Symptoms: Check Engine light, rough idling, poor acceleration, stalling.
• Solution: Cleaning or replacement of the EGR valve.
• Cost: $200 - $500

3.6L V6

Timing Chain Issues

• Symptoms: Rattling noise from the front of the engine, especially on startup; Check Engine light.
• Solution: Replacement of timing chains, tensioners, and guides.
• Cost: $1200 - $2500

Oil Leaks (Valve Cover Gaskets)

• Symptoms: Visible oil leaks around the valve covers, burning oil smell.
• Solution: Replacement of valve cover gaskets.
• Cost: $300 - $600

Transmission

4-Speed Automatic (4T65-E)

Torque Converter Issues

• Symptoms: Shuddering at low speeds, slipping gears, delayed engagement.
• Solution: Rebuilding or replacing the torque converter.
• Cost: $800 - $1500

Solenoid Malfunction

• Symptoms: Harsh shifting, transmission warning light, failure to shift gears.
• Solution: Replacement of transmission solenoids.
• Cost: $400 - $800

Suspension

Standard Chassis

Strut Mount Bearing Failure

• Symptoms: Clunking or popping noises when turning the steering wheel, especially at low speeds.
• Solution: Replacement of strut mount bearings.
• Cost: $200 - $400

Worn Ball Joints/Tie Rod Ends

• Symptoms: Clunking noises over bumps, loose steering feel, uneven tire wear.
• Solution: Replacement of worn ball joints and/or tie rod ends.
• Cost: $300 - $600

Electrical

Body Control Module (BCM)

BCM Malfunction

• Symptoms: Intermittent issues with power windows, locks, interior lights, or dashboard warning lights.
• Solution: Reprogramming or replacement of the BCM.
• Cost: $500 - $1000

Alternator

Alternator Failure

• Symptoms: Dimming headlights, battery warning light, dead battery, electrical system malfunctions.
• Solution: Replacement of the alternator.
• Cost: $400 - $700

Exterior

Standard Body

No Major Issues

• Symptoms: No widespread issues reported.
• Solution: No widespread issues reported.
• Cost: N/A

Interior

Standard Interior

HVAC Blower Motor Resistor Failure

• Symptoms: HVAC fan only works on the highest setting, or not at all.
• Solution: Replacement of the blower motor resistor.
• Cost: $100 - $250

Door Lock Actuator Failure

• Symptoms: Power door locks not working consistently or at all.
• Solution: Replacement of faulty door lock actuators.
• Cost: $200 - $400

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Summary Verdict

The 2007 Buick LaCrosse generally presents a mixed reliability profile. The engines, particularly the 3.8L V6, are known for some common but repairable issues like intake manifold leaks. The 3.6L V6 can be more prone to timing chain problems. Transmission issues, especially with the 4-speed automatic, can be costly, with torque converter and solenoid problems being notable. Suspension components like strut mounts and ball joints may require attention over time. Electrical gremlins, often related to the BCM or alternator, can also arise. While the exterior is typically robust, interior components like the HVAC resistor and door lock actuators are common failure points. Overall, while not a problematic vehicle, potential buyers should be aware of these specific areas and budget for potential repairs.