2020 BMW 420i Gran Coupe
Introduction
The 2020 BMW 420i Gran Coupe is a four-door, five-seat luxury sedan powered by a 2.0L turbocharged inline-four engine. It comes standard with an eight-speed automatic transmission and rear-wheel drive. Other engine options include a 3.0L turbocharged inline-six engine and a 3.0L turbocharged diesel inline-six engine. Transmission options include a six-speed manual transmission for the 3.0L turbocharged inline-six engine and a 10-speed automatic transmission for the 3.0L turbocharged diesel inline-six engine.
The 420i Gran Coupe is praised for its stylish design, comfortable interior, and agile handling. However, it has also received some criticism for its high price and lack of standard features.
Engine
2.0L Turbocharged Inline-Four Engine
- Timing Chain Failure
- Description/Symptoms: The timing chain may stretch or break, causing the engine to lose power or stall.
- Solution: Replace the timing chain and tensioners.
- Estimated Cost to Fix: $1,500 - $2,500+
- Recalls: None Found
- Valve Stem Seal Failure
- Description/Symptoms: The valve stem seals may fail, causing oil to leak into the combustion chamber and burn. This can result in blue smoke from the exhaust, increased oil consumption, and reduced engine performance.
- Solution: Replace the valve stem seals.
- Estimated Cost to Fix: $500 - $1,000+
- Recalls: None Found
- Turbocharger Failure
- Description/Symptoms: The turbocharger may fail, causing a loss of power and boost pressure.
- Solution: Replace the turbocharger.
- Estimated Cost to Fix: $1,500 - $2,500+
- Recalls: None Found
3.0L Turbocharged Inline-Six Engine
- High-Pressure Fuel Pump Failure
- Description/Symptoms: The high-pressure fuel pump may fail, causing a loss of fuel pressure and engine performance.
- Solution: Replace the high-pressure fuel pump.
- Estimated Cost to Fix: $1,000 - $1,500+
- Recalls: None Found
- Injector Failure
- Description/Symptoms: The fuel injectors may fail, causing a loss of power and fuel economy.
- Solution: Replace the fuel injectors.
- Estimated Cost to Fix: $500 - $1,000+
- Recalls: None Found
3.0L Turbocharged Diesel Inline-Six Engine
- Diesel Particulate Filter (DPF) Clogging
- Description/Symptoms: The DPF may become clogged, causing a loss of power and fuel economy.
- Solution: Clean or replace the DPF.
- Estimated Cost to Fix: $500 - $1,000+
- Recalls: None Found
- EGR Valve Failure
- Description/Symptoms: The EGR valve may fail, causing a loss of power and fuel economy.
- Solution: Replace the EGR valve.
- Estimated Cost to Fix: $500 - $1,000+
- Recalls: None Found
Transmission
Eight-Speed Automatic Transmission
- Transmission Control Module (TCM) Failure
- Description/Symptoms: The TCM may fail, causing the transmission to shift erratically or not at all.
- Solution: Replace the TCM.
- Estimated Cost to Fix: $1,000 - $1,500+
- Recalls: None Found
- Torque Converter Failure
- Description/Symptoms: The torque converter may fail, causing the transmission to slip or shudder.
- Solution: Replace the torque converter.
- Estimated Cost to Fix: $1,500 - $2,500+
- Recalls: None Found
Six-Speed Manual Transmission
- Synchronizer Failure
- Description/Symptoms: The synchronizers may fail, making it difficult to shift gears.
- Solution: Replace the synchronizers.
- Estimated Cost to Fix: $500 - $1,000+
- Recalls: None Found
Ten-Speed Automatic Transmission
- Mechatronic Unit Failure
- Description/Symptoms: The mechatronic unit may fail, causing the transmission to shift erratically or not at all.
- Solution: Replace the mechatronic unit.
- Estimated Cost to Fix: $1,500 - $2,500+
- Recalls: None Found
Suspension
- Front Control Arm Bushing Failure
- Description/Symptoms: The front control arm bushings may fail, causing clunking or rattling noises from the front suspension.
- Solution: Replace the control arm bushings.
- Estimated Cost to Fix: $200 - $500+
- Recalls: None Found
- Rear Shock Absorber Failure
- Description/Symptoms: The rear shock absorbers may fail, causing a loss of ride comfort and handling.
- Solution: Replace the shock absorbers.
- Estimated Cost to Fix: $500 - $1,000+
- Recalls: None Found
Electrical
- Alternator Failure
- Description/Symptoms: The alternator may fail, causing the battery to discharge and the vehicle to lose power.
- Solution: Replace the alternator.
- Estimated Cost to Fix: $500 - $1,000+
- Recalls: None Found
- Battery Failure
- Description/Symptoms: The battery may fail, causing the vehicle to lose power and not start.
- Solution: Replace the battery.
- Estimated Cost to Fix: $100 - $200+
- Recalls: None Found
Exterior
- Sunroof Drain Plugs Clogging
- Description/Symptoms: The sunroof drain plugs may become clogged, causing water to leak into the interior of the vehicle.
- Solution: Clean or replace the sunroof drain plugs.
- Estimated Cost to Fix: $100 - $200+
- Recalls: None Found
- Wheel Bearing Failure
- Description/Symptoms: The wheel bearings may fail, causing a humming or grinding noise from the wheels.
- Solution: Replace the wheel bearings.
- Estimated Cost to Fix: $500 - $1,000+
- Recalls: None Found
Interior
- Central Display Screen Failure
- Description/Symptoms: The central display screen may fail, causing it to become unresponsive or blank.
- Solution: Replace the central display screen.
- Estimated Cost to Fix: $1,000 - $1,500+
- Recalls: None Found
- Climate Control Failure
- Description/Symptoms: The climate control system may fail, causing it to not function properly or not blow air.
- Solution: Replace the climate control module or actuator.
- Estimated Cost to Fix: $500 - $1,000+
- Recalls: None Found
Summary
The 2020 BMW 420i Gran Coupe has a variety of potential issues, ranging from minor inconveniences to major mechanical failures. While some of these issues are relatively inexpensive to fix, others can be quite costly. As with any vehicle, it is important to regularly maintain the 420i Gran Coupe to help prevent or catch problems early.