1994 BMW 740i

Introduction: The 1994 BMW 740i is a full-size luxury sedan powered by a 4.0-liter V8 engine and a 5-speed automatic transmission. It produces 282 horsepower and 324 lb-ft of torque. The 740i offers a spacious and comfortable interior, strong performance, and advanced features for its time. However, it is known for some common issues that owners may encounter.

Engine

4.0-liter V8

• Intake manifold gasket failure: Symptoms include coolant leaks, overheating, and rough idling. Solution: Replace the intake manifold gasket. Estimated Cost to Fix: $500 - $1000+
• Timing chain tensioner failure: Symptoms include rattling noises from the engine, especially at startup. Solution: Replace the timing chain tensioner. Estimated Cost to Fix: $1000 - $2000+
• Crankshaft position sensor failure: Symptoms include no-start conditions, intermittent stalling, and rough idling. Solution: Replace the crankshaft position sensor. Estimated Cost to Fix: $200 - $400+

Transmission

5-Speed Automatic

• Transmission fluid leaks: Symptoms include slipping gears, delayed shifts, and burnt transmission fluid. Solution: Replace the transmission fluid and seals. Estimated Cost to Fix: $200 - $500+
• Solenoid pack failure: Symptoms include harsh shifting, slipping gears, and transmission error codes. Solution: Replace the solenoid pack. Estimated Cost to Fix: $500 - $1000+
• Torque converter failure: Symptoms include loss of power, shuddering during acceleration, and overheating. Solution: Replace the torque converter. Estimated Cost to Fix: $1500 - $2500+

Suspension

• Strut mount failure: Symptoms include clunking noises over bumps and reduced handling. Solution: Replace the strut mounts. Estimated Cost to Fix: $400 - $800+
• Sway bar link failure: Symptoms include rattling noises from the suspension and excessive body roll. Solution: Replace the sway bar links. Estimated Cost to Fix: $200 - $400+
• Control arm bushing failure: Symptoms include excessive tire wear and misalignment. Solution: Replace the control arm bushings. Estimated Cost to Fix: $400 - $800+

Electrical

• Battery drain: Symptoms include a dead battery after sitting for a period of time. Solution: Test the battery and charging system. Replace the battery or alternator if necessary. Estimated Cost to Fix: $200 - $800+
• Alternator failure: Symptoms include dim headlights, flickering gauges, and difficulty starting the car. Solution: Replace the alternator. Estimated Cost to Fix: $500 - $1000+
• Power window failure: Symptoms include inoperable power windows or intermittent operation. Solution: Replace the power window motor or switch. Estimated Cost to Fix: $200 - $500+

Exterior

• Door handle breakage: Symptoms include difficulty opening the doors or broken door handles. Solution: Replace the door handles. Estimated Cost to Fix: $300 - $600+
• Headlight failure: Symptoms include dim or inoperable headlights. Solution: Replace the headlight bulbs or ballasts. Estimated Cost to Fix: $200 - $800+
• Grille fading: Symptoms include fading or discoloration of the grille. Solution: Replace the grille. Estimated Cost to Fix: $200 - $500+

Interior

• Instrument cluster failure: Symptoms include inoperable gauges or flickering displays. Solution: Repair or replace the instrument cluster. Estimated Cost to Fix: $400 - $1000+
• HVAC control failure: Symptoms include difficulty adjusting temperature or air flow. Solution: Replace the HVAC control unit. Estimated Cost to Fix: $500 - $1200+
• Seat belt tensioner failure: Symptoms include a loose seat belt or inoperative tensioner. Solution: Replace the seat belt tensioner. Estimated Cost to Fix: $500 - $1000+

Summary The BMW 740i is a luxurious and capable sedan, but it is not without its issues. Some of the common problems owners may encounter include intake manifold gasket failure, timing chain tensioner failure, transmission fluid leaks, suspension wear, electrical issues, and interior component failures. While the most severe issues can be expensive to fix, most of the problems are relatively minor and can be addressed with moderate expenses. Overall, the 740i remains a desirable car for those seeking a well-equipped and powerful luxury sedan, but potential buyers should be aware of the potential issues and maintenance costs involved.