About BMW 635CSi
As a member of the BMW 6 Series, which is BMW's 5 Series-based model lineup and the successor to BMW New Six Coupe (E9), BMW 635CSi was built by a famous German manufacturing company, Bayerische Motren Werke AG, more known under its abbreviation BMW, between 1985 and 1989 for North American market as a full-size luxury car. Originally introduced as a model in the first-generation 6 Series, 635CSi was also called as the M6 in the United States and Japan. Competing against the Mercedes-Benz E-Class, Mercedes-Benz CLS, Audi A7, and Jaguar XF, 635CSi was discontinued after being manufactured for only about five years.
BMW 635CSi made its debut in North American market for the 1985 model year as the successor to the 633CSi. It was offered in only one body style, 2-door coupe and came in only one trim level but also was available for a luxury edition. Equipped with MacPherson struts and twin-pivot lower control arm in front suspension and independent semi-trailing arms in rear suspension, steering using a recirculation ball system with power assistance, Bosch Motronic fuel-injection system, locking system being operated from the passenger door and trunk, and ellipsoid headlamps, BMW 635CSi was powered by a 3.5 L I6 rated at 215 hp and 224 pound-feet of torque and a 3.0 L I6 engine producing 182 horsepower and 214 lb-ft of torque, and the latter was replaced by a 3.4 L I6 making 208 hp and 255 lb-ft of torque. Both engines sent power through 4-speed, 5-speed manual and 4-speed automatic transmissions to rear wheels.
BMW 635CSi Common Problems & Maintenance Tips
No matter how tough the BMW 635CSi was built, if you take its age into consideration, you will know the youngest 635CSi now is nearly thirty-year-old, which is not an optimistic age for vehicles. Under such circumstances, if you want to 635CSi live a longer time, then these common problems on it deserve your extra attention:
First, for an aging model like BMW 635CSi, engine failure is definitely the most common and serious issue that drivers will meet a lot during driving. Since this issue will influence vehicle performance badly and even shorten the vehicle's lifespan, you had better get it diagnosed and solved as soon as possible based on the recognizable and simple symptoms of it provided by experienced 635CSi drivers. At first, you may hear strange sounds from the engine such as whining, squealing or rattling; then the engine will have performance issues such as misfiring, stalling, hard starting or inability to start; finally, you will notice a big reduction in power, acceleration and fuel economy. Once the Check Engine Light comes on, please inspect the working condition of 635CSi spark plug, oxygen sensors, fuel pump, drive belt, oil filter, air filter and valve cover gasket immediately.
Second, another horrible on BMW 635CSi that troubles drivers a lot would be the transmission failure. In fact, many 635CSi drivers have not enough understanding about this issue and even underestimate the consequences it could bring; therefore, they may lose the gold chance to solve this problem. These typical symptoms from professional car repairmen would be helpful for you in diagnosing and solving this issue. Generally, when there are clunking or grinding noises from the beneath the vehicle; when transmission fluids leak on the ground; when the indicator does not match the gear; when vehicle starts in another gear or refuses to go into gear; and when you feel hard to shift gear, then the 635CSi transmission assembly, automatic transmission filter, automatic transmission shifter, transfer case seal, shift cable and clutch fork must go wrong.
For perfect ride on your BMW 635CSi, you need perfect auto parts to help. However, some parts on it just could not last as long as the vehicle could due to fragile materials and harsh working conditions. Therefore, parts such as 635CSi seat belt, windshield wiper, wiper blade, fog light, headlight, antenna and cabin air filter should be maintained routinely to keep in best shape as they are helpful in creating safe and comfortable driving environment but they are also exposed to adverse conditions.
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