There's no mistaking that a BMW 740i is made for people with hefty bank accounts. Excellent handling dynamics, thanks to a powerful, state-of-the-art engine, make this sweet ride one for the elite. Add to that the lavish accouterments, a rear-wheel drive, and a sleek body. With its steep price, one can only expect unstoppable power and style from this vehicle. Unfortunately, this sedan has some issues that make owners wonder if buying one was ever worth their money.
The BMW 740i is equipped with a powerful engine that promises excellent drive. However, some units have shown a decrease in engine performance due to a bad PCV valve. The busted PCV valve in the sedan creates a backpressure buildup in the exhaust. This leads the engine to stall and blow out excess smoke. The problem is common among 740i units that have about 60,000 miles in them.
Engine oil leak from a valve cover problem is one of the 740i issues that owners had to deal with. This problem, which affected models from 1993 up to 2001 with average mileage of 117,800 miles, decreases the car's performance and fuel efficiency. Engine oil leaks out because of loose or misshapen valve covers.
On the other hand, the steering hose leak hampers the smooth maneuvering of the steering wheel. Power steering leaks are common because of the high pressure within the system. The power steering system of the vehicle includes several hoses (pressure, return, and supply hoses) that often chafe against each other while the vehicle is in motion. The friction in between the hoses creates cracks where power steering fluid comes out. Other possible causes for the leak are defective seals and too-tight connection.
Several 740i units have shown brake light failure that prompted recalls on the 3, 5, and 7 Series. The brake lights, which are activated upon pressing on the brake pedal, remains in either the "brake lamps on" or "brake lamps off" position. Whether illuminated or not, the faulty brake lights gives other motorists the wrong signal, which often leads to road accidents.
As part of the BMW 7-Series, the BMW 740i is a representation of technology and comfort. A noted luxury sedan throughout its production life, this model has always been a safe choice by wealthy consumers looking for an elegant and spacious ride that bears the curbside capabilities the German automobile manufacturer is known for. However, like most vehicles, the BMW 740i is not immune to problems-mechanical or otherwise. That is why it is wise to know each of these in order to prevent them. Following are some common issues the luxury sedan is known to encounter.
This problem is no more than an issue with gaskets, bushings, and different seals. However, this small problem can snowball into bigger ones when the oil or fluid leaking contaminates other functioning BMW 740i parts. Common leak problems occur at the valve covers, VANOS solenoid seals, and intake manifold gaskets.
Like most parts, the cooling fan under the hood should not be taken for granted. It is because once it fails, the engine as well as close BMW 740i accessories and parts will be prone to overheating and malfunction eventually. In severe cases of overheating, the underhood may even catch fire. This is why there had been a recall in this simple part in 2001 where 76,469 units were affected. During the recall, the cooling fans were replaced by the manufacturer with new and more durable ones.
All BMW cars in general take pride in its luxurious and easy handling and steering. This means that a problem with the steering system will be detrimental to the essence of one BMW unit. Unfortunately, the 740i is not resistant to steering problems. Most common of these is an issue with the center drag links where the steering center tie rods shear off, resulting in complete loss of vehicle control. In 2010, there was a recall of this particular part where the old tie rods were replaced by new ones care of the manufacturer.
One of the most abused parts of all cars is the ball joints in the suspension system. Since they are the ones that allow suspension system movement during steering and bumpy roads, they are very much prone to wearing and malfunction. Once damaged, ball joints will cause wheel alignment and tire wear issues.