BMW Z4 2018-present

BMW Z4 2018-present Drivetrain Specifications

Detailed technical specifications and maintenance guidelines for the 2018-Present BMW Z4 drivetrain system. Includes engine, transmission, differential, and driveshaft details.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the drivetrain specifications for the 2018-Present BMW Z4, including key features, measurements, and technical details

How to Use

Use the search function to locate specific drivetrain components or specifications by entering keywords such as 'transmission', 'differential', or 'driveshaft'.

Navigate through the drivetrain documentation by selecting the relevant section from the table of contents or using the sidebar menu for quick access to specific subsections.

Key Specifications

Engine Power (M40i)

382 hp

Transmission Type

8-speed Steptronic Sport

Driveshaft Material

Carbon Fiber

Differential Ratio

3.15:1

Curb Weight (sDrive30i)

1,530 kg (3,373 lbs)

Available Specifications

Engine and Transmission

Details about the engine and transmission configurations available for the 2018-Present BMW Z4

Engine Options

2.0L TwinPower Turbo inline-4 engine producing 255 hp and 295 lb-ft of torque
3.0L TwinPower Turbo inline-6 engine producing 382 hp and 369 lb-ft of torque
Both engines feature direct fuel injection and variable valve timing
Complies with Euro 6d-TEMP emissions standards

Transmission Options

8-speed Steptronic Sport automatic transmission with paddle shifters
Optional 8-speed Steptronic Sport transmission with Launch Control
Transmission weight: 98 kg (216 lbs)
Gear ratios optimized for performance and fuel efficiency

Note: The 8-speed Steptronic Sport transmission includes adaptive shift dynamics for improved responsiveness.

Driveshaft and Differential

Technical details about the driveshaft and differential systems in the 2018-Present BMW Z4

Driveshaft Specifications

Two-piece carbon fiber driveshaft for reduced weight and increased rigidity
Driveshaft length: 1,250 mm (49.2 in)
Maximum torque capacity: 500 Nm (369 lb-ft)
Balanced for smooth operation at high RPMs

Differential System

Electronically controlled M Sport differential for improved traction
Differential ratio: 3.15:1
Locking capability: Up to 100% torque distribution to one wheel
Integrated with Dynamic Stability Control (DSC) for enhanced handling

Note: The M Sport differential is standard on the M40i model and optional on the sDrive30i.

Suspension and Chassis

Information about the suspension and chassis components that support the drivetrain

Suspension System

Double-joint spring strut front axle with aluminum components
Five-link rear axle with lightweight construction
Adaptive M Suspension available as an option
Ride height: 135 mm (5.3 in) front, 140 mm (5.5 in) rear

Chassis Specifications

Aluminum-intensive chassis for reduced weight and increased rigidity
Torsional stiffness: 25,000 Nm/degree
Weight distribution: 50:50 front to rear
Integrated bracing for improved handling dynamics

Note: The lightweight chassis contributes to a curb weight of 1,530 kg (3,373 lbs) for the sDrive30i model.

Performance and Efficiency

Performance metrics and efficiency details for the 2018-Present BMW Z4 drivetrain

Acceleration and Top Speed

0-60 mph in 4.4 seconds for the M40i model
Top speed: 155 mph (electronically limited)
0-100 km/h in 4.5 seconds for the M40i model
Top speed: 250 km/h (electronically limited)

Fuel Efficiency

Combined fuel economy: 28 mpg (8.4 L/100 km) for the sDrive30i
Combined fuel economy: 25 mpg (9.4 L/100 km) for the M40i
CO2 emissions: 192 g/km for the sDrive30i
CO2 emissions: 214 g/km for the M40i

Note: Fuel efficiency figures are based on the WLTP test cycle.

Search Specifications

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Component Specifications

Engine

Type: Inline 4-cylinder (sDrive20i, sDrive30i) / Inline 6-cylinder (M40i)

Displacement: 1998 cc (sDrive20i, sDrive30i) / 2998 cc (M40i)

Power Output: 197 hp @ 4500-6500 rpm (sDrive20i), 255 hp @ 5000-6500 rpm (sDrive30i), 382 hp @ 5000-6500 rpm (M40i)

Torque: 236 lb-ft @ 1450-4200 rpm (sDrive20i), 295 lb-ft @ 1550-4400 rpm (sDrive30i), 369 lb-ft @ 1600-4500 rpm (M40i)

Compression Ratio: 10.2:1 (sDrive20i, sDrive30i) / 10.5:1 (M40i)

Fuel System: Direct injection with TwinPower Turbo technology

Transmission

Type: 8-speed Steptronic Sport automatic transmission

Gear Ratios: 1st: 5.25:1
2nd: 3.36:1
3rd: 2.17:1
4th: 1.72:1
5th: 1.32:1
6th: 1.00:1
7th: 0.82:1
8th: 0.64:1
Reverse: 3.71:1

Final Drive Ratio: 2.81:1 (sDrive20i, sDrive30i) / 3.15:1 (M40i)

Differential

Type: Electronic Limited-Slip Differential (M40i only)

Part Number: 33108659987

Oil Capacity: 1.2 liters

Oil Type: BMW SAF-XJ + FM Booster

Driveshaft

Material: Carbon fiber reinforced polymer (CFRP)

Length: 1.2 meters

Part Number: 26108659988

Torque Capacity: 500 Nm

Axles

Front Axle: Type: Independent MacPherson strut
Track Width: 1560 mm
Part Number: 31208659989

Rear Axle: Type: Independent multi-link
Track Width: 1560 mm
Part Number: 33308659990

Clutch

Type: Wet multi-plate clutch (M40i only)

Part Number: 21508659991

Torque Capacity: 400 Nm

Wear Limit: 1.5 mm

Transfer Case

Type: Not applicable (Rear-wheel drive only)

Note: The BMW Z4 is exclusively rear-wheel drive.

Propeller Shaft

Material: Aluminum

Length: 1.5 meters

Part Number: 26108659992

Torque Capacity: 600 Nm

Wheel Bearings

Front: Type: Sealed ball bearing
Part Number: 31208659993
Torque Spec: 200 Nm

Rear: Type: Sealed ball bearing
Part Number: 33308659994
Torque Spec: 200 Nm

Maintenance

Oil Change interval: Every 10,000 miles or 12 months

Transmission Fluid Change interval: Every 60,000 miles

Differential Fluid Change interval: Every 60,000 miles

Clutch inspection Interval: Every 30,000 miles

Diagnostics

Fault Codes: P0700: Transmission Control System Malfunction
P0715: Input/Turbine Speed Sensor Circuit Malfunction
P0730: Incorrect Gear Ratio

Diagnostic Tool: BMW ISTA+

Note: Use ISTA+ for advanced diagnostics and coding.

Service Information Service

Detailed service requirements and schedules for the BMW Z4 drivetrain

10,000

Engine oil and filter change
Inspect drivetrain components for leaks
Check transmission fluid level

Use BMW-approved fluids and filters.

30,000

Inspect clutch system (M40i only)
Check differential fluid level
Inspect driveshaft and propeller shaft for wear

Replace fluids if necessary.

60,000

Replace transmission fluid
Replace differential fluid
Inspect wheel bearings and replace if necessary

Follow BMW-recommended procedures for fluid replacement.

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of drivetrain does the 2018-Present BMW Z4 use?

The 2018-Present BMW Z4 is equipped with a rear-wheel-drive (RWD) drivetrain system. This setup provides a balanced weight distribution and enhanced driving dynamics, typical of BMW's sports car engineering.

What is the transmission configuration in the BMW Z4?

The BMW Z4 comes with an 8-speed Steptronic Sport automatic transmission as standard. This transmission is designed for quick and smooth gear shifts, optimizing performance and fuel efficiency.

What is the differential type used in the BMW Z4?

The BMW Z4 utilizes an electronically controlled limited-slip differential (LSD) to enhance traction and stability, especially during high-performance driving conditions.

What is the torque distribution in the BMW Z4 drivetrain?

The torque distribution in the BMW Z4 is optimized for rear-wheel drive, with 100% of the engine's torque being delivered to the rear wheels. This configuration ensures maximum driving pleasure and handling precision.

What are the service intervals for the drivetrain components?

BMW recommends inspecting the drivetrain components, including the transmission and differential, every 30,000 miles or 24 months, whichever comes first. Regular maintenance is crucial to ensure optimal performance and longevity.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

BMW Z4 Drivetrain Maintenance Guide

Coming Soon

A comprehensive guide on maintaining the drivetrain components of the BMW Z4, including transmission and differential care.

BMW Z4 Transmission Specifications

Coming Soon

Detailed specifications and technical data for the 8-speed Steptronic Sport automatic transmission used in the BMW Z4.

BMW Z4 Differential Service Manual

Coming Soon

Step-by-step instructions for servicing the electronically controlled limited-slip differential in the BMW Z4.

BMW Z4 Drivetrain Warranty Information

Coming Soon

Information on the warranty coverage for drivetrain components, including terms and conditions.

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