2018 BMW M4 Convertible 6MT
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Unverified
All photo credits
- Photo: BMW M4 F82 2015 (1) by Ethan Llamas, CC BY-SA 4.0, via Wikimedia Commons
- Photo: BMW M4 by Calreyn88, CC BY-SA 4.0, via Wikimedia Commons
- Photo: An M4 From Side by MrWalkr, CC BY-SA 4.0, via Wikimedia Commons
- Photo: BMW M4 F82 2015 (2) by Ethan Llamas, CC BY-SA 4.0, via Wikimedia Commons
- Photo: BMW M4 Coupe interior by TTTNIS, CC0, via Wikimedia Commons
The 2018 BMW M4 Convertible 6MT is a 425-hp 3.0-liter turbocharged inline-6 convertible with a 6-speed manual and rear-wheel drive. It is rated at 20 mpg combined.
It makes 425 horsepower at 5,500 rpm and 406 lb-ft of torque at 1850-5500 rpm, spinning to a 7,600 rpm redline. EPA fuel-economy estimates are 17 mpg city and 25 mpg highway (20 mpg combined).
The M4 measures 184.5 inches long on a 110.7-inch wheelbase and has a curb weight of 4,055 lb.
| Spec | Value |
|---|---|
| Vehicle | |
| Body Type | Convertible |
| Powertrain | Gas |
| Engine | |
| Engine Type | 3.0L M TwinPower Turbo Inline-6 (S55) |
| Displacement | 2.979 L |
| Horsepower | 425 hp @ 5,500 rpm |
| Torque | 406 lb-ft @ 1850-5500 rpm |
| Redline | 7,600 rpm |
| Valvetrain | DOHC 24-valve VALVETRONIC / Double-VANOS |
| Bore and Stroke | 84.0 x 89.6 |
| Compression Ratio | 10.2:1 |
| Injection Type | High Precision Direct Injection |
| Drivetrain | |
| Drive Type | RWD |
| Differential Type | Active M Differential |
| Transmission | |
| Transmission | 6-speed manual |
| 1st Gear | 4.11 (42 mph **) |
| 2nd Gear | 2.315 (75 mph **) |
| 3rd Gear | 1.542 (113 mph **) |
| 4th Gear | 1.179 (148 mph **) |
| 5th Gear | 1 (174 mph **) |
| 6th Gear | 0.846 (206 mph **) |
| Reverse | 3.727 |
| Final Drive | 3.462 |
| Fuel Economy | |
| City | 17 MPG |
| Highway | 25 MPG |
| Combined | 20 MPG |
| Recommended Fuel | Premium |
| Tank Capacity | 15.8 gal |
| Suspension | |
| Turning Diameter | 40 ft |
| Brakes | |
| Front Brake Disc | 15.0 in ventilated compound disc |
| Rear Brake Disc | 14.6 in ventilated compound disc |
| Tires & Wheels | |
| Wheels Front | 9.0 x 18 |
| Wheels Rear | 10.0 x 18 |
| Tires Front | 255/40ZR18 |
| Tires Rear | 275/40ZR18 |
| Dimensions & Weight | |
| Length | 184.5 in |
| Width | 73.6 in |
| Height | 54.6 in |
| Wheelbase | 110.7 in |
| Front Track | 62.2 in |
| Rear Track | 63.1 in |
| Ground Clearance | 4.7 in |
| Cargo Volume | 7.9 ft³ |
| Curb Weight | 4,055 lbs |
| Weight Distribution (F/R) | 47.3% / 52.7% |
| Interior | |
| Headroom Front | 39.8 in |
| Headroom Rear | 36.1 in |
| Legroom Front | 42.2 in |
| Legroom Rear | 33.7 in |
| Shoulder Room Front | 55.3 in |
| Shoulder Room Rear | 51.7 in |
Similar cars
Rivals to the 2018 BMW M4 Convertible 6MT with similar size, power and price from around the same years.
Safety & Recalls
NCAP safety ratings
Tested, but no star ratings were published (2018 BMW M4 2 DR RWD).
Recalls
1 recall on file with NHTSA for the 2018 BMW M4. Not every recall applies to every trim or VIN — check yours at nhtsa.gov/recalls.
Aug 16, 2017 · SEAT BELTS:FRONT
BMW of North America, LLC (BMW) is recalling certain 2018 430i, 430i xDrive, 440i, 440i xDrive, and M4 convertible vehicles. The Emergency Locking Retractors (ELR) within the front seat belt assemblies may have been produced with incompatible vehicle-sensitive locking mechanism housings.
Consequence: If the vehicle has an incompatible vehicle-sensitive locking mechanism, the seat belt may not restrain the seat occupant in the event of a crash, increasing the risk of injury.
Remedy: BMW will notify owners, and dealers will inspect and, if necessary replace, the front seat belt assemblies, free of charge. The recall began October 13, 2017. Owners may contact BMW customer service at 1-800-525-7417.
NHTSA campaign 17V507000
6 owner complaints to NHTSA for the 2018 BMW M4
Owner Complaints
6 owner complaints filed with NHTSA for the 2018 BMW M4. See all on nhtsa.gov
| Fuel/Propulsion System | 4 |
| Back Over Prevention | 1 |
| Engine | 1 |
Complaints are unverified reports submitted to NHTSA by owners. They cover the whole model year, not a specific trim, and a count alone doesn't show how common a problem is.
Source: US National Highway Traffic Safety Administration (nhtsa.gov), matched as 2018 BMW M4. US-market vehicles only; data cached for up to 7 days.