BMW X1 2015-2021

BMW X1 2015-2021 ZF 8HP Transmission Specifications

Detailed technical specifications for the ZF-8HP automatic transmission used in the 2015-2021 BMW X1. This document covers gear ratios, torque capacity, fluid specifications, shift logic, and diagnostic procedures specific to the ZF 8-speed automatic transmission.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the ZF 8HP transmission specifications for the 2015-2021 BMW X1, including key features, measurements, and technical details.

How to Use

Use the search function to locate specific ZF 8HP transmission specifications by entering keywords such as 'gear ratios,' 'torque capacity,' or 'fluid capacity.'

Navigate through the documentation sections using the table of contents or by scrolling through the major sections and subsections.

Key Specifications

Transmission Type

8-speed automatic

Torque Capacity

500 Nm (369 lb-ft)

Fluid Capacity

9.5 liters (10.0 quarts)

Weight

87 kg (192 lbs)

Gear Ratios

1st: 5.000:1, 8th: 0.640:1

Available Specifications

Transmission Design and Architecture

Details about the design, architecture, and key components of the ZF 8HP transmission.

Transmission Layout

8-speed automatic transmission with planetary gear sets
Compact and lightweight design for improved efficiency
Integrated torque converter with lock-up clutch
Electronically controlled hydraulic system for precise shifting

Key Components

Four planetary gear sets for 8 forward gears
Five multi-plate clutches for gear engagement
Electro-hydraulic control unit for gear shifting
Integrated transmission oil cooler for thermal management

Note: The transmission is designed for longitudinal engine placement in the BMW X1.

Performance Specifications

Technical specifications related to the performance and capabilities of the ZF 8HP transmission.

Gear Ratios

1st gear: 5.000:1
2nd gear: 3.200:1
3rd gear: 2.143:1
4th gear: 1.720:1
5th gear: 1.314:1

Torque Capacity

Maximum torque capacity: 500 Nm (369 lb-ft)
Designed for high-performance and high-torque applications
Supports both gasoline and diesel engines
Optimized for smooth and rapid gear shifts

Note: Torque capacity may vary depending on the specific engine configuration.

Maintenance and Fluid Specifications

Information on maintenance requirements and fluid specifications for the ZF 8HP transmission.

Transmission Fluid

Recommended fluid: ZF Lifeguard 8
Fluid capacity: 9.5 liters (10.0 quarts)
Fluid change interval: 80,000 km (50,000 miles) or as per BMW recommendations
Fluid operating temperature range: -40°C to 150°C (-40°F to 302°F)

Maintenance Procedures

Regular inspection of transmission fluid level and condition
Replacement of transmission filter during fluid changes
Diagnostic scan for fault codes using BMW-specific tools
Periodic calibration of the transmission control unit

Note: Use only BMW-approved fluids and components for maintenance.

Electronics and Control Systems

Details about the electronic control systems and integration with the BMW X1.

Control Unit

Integrated transmission control module (TCM)
Supports adaptive shift strategies for driving conditions
Compatible with BMW's Driving Experience Control modes
Real-time monitoring of transmission parameters

Integration with Vehicle Systems

Seamless integration with BMW's xDrive all-wheel-drive system
Communication with engine control unit (ECU) for optimized performance
Supports start-stop functionality for improved fuel efficiency
Compatible with BMW's ConnectedDrive services

Note: The TCM is programmed to adapt to the driver's behavior over time.

Search Specifications

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Transmission Specifications

General information

Transmission Type: 8-speed automatic

Manufacturer: ZF Friedrichshafen AG

Model: 8HP

Part Number: 8HP45X

Compatible Models: 2015-2021 BMW X1 (F48)

Weight: 86 kg (189.6 lbs)

Fluid Type: ZF Lifeguard 8

Fluid Capacity: 9.5 liters (10 quarts)

Gear Ratios

1st Gear: 4.714:1

2nd Gear: 3.143:1

3rd Gear: 2.106:1

4th Gear: 1.667:1

5th Gear: 1.285:1

6th Gear: 1.000:1

7th Gear: 0.839:1

8th Gear: 0.667:1

Reverse Gear: 3.317:1

Torque Capacity

Maximum input Torque: 450 Nm (332 lb-ft)

Maximum Output Torque: 500 Nm (369 lb-ft)

Torque Converter Lockup Range: 1200-6000 rpm

Operational Parameters

Maximum Engine Speed: 7000 rpm

Shift Response Time: 200 ms

Temperature Operating Range: -40°C to 150°C (-40°F to 302°F)

Maximum Fluid Temperature: 135°C (275°F)

Pressure Range: 2.5-20 bar (36.3-290 psi)

Electronic Control

Control Unit: EGS (Electronic Transmission Control)

Sensors

Input speed sensor
Output speed sensor
Transmission fluid temperature sensor
Pressure sensors

Communication Protocol: CAN bus

Software Version: EGS52.1

Maintenance Specifications

Fluid Change interval: 60,000 miles or 48 months

Filter Change interval: 60,000 miles or 48 months

Seal inspection Interval: 100,000 miles or 84 months

Torque Converter inspection Interval: 100,000 miles or 84 months

Fluid Specification: ZF Lifeguard 8 (part number: S671 090 312)

Diagnostic Specifications

Fault Codes

P0700 - Transmission Control System Malfunction
P0715 - Input/Turbine Speed Sensor Circuit Malfunction
P0720 - Output Speed Sensor Circuit Malfunction
P0741 - Torque Converter Clutch Circuit Performance or Stuck Off

Diagnostic Tool: BMW ISTA (Integrated Service Technical Application)

Diagnostic Protocol: ISO 15765-4 (CAN)

Safety information

Fluid Handling: Use gloves and eye protection when handling transmission fluid

Temperature Warning: Avoid contact with hot transmission components

Pressure Warning: Relieve system pressure before servicing

Electrical Safety: Disconnect battery before working on electronic components

Related Components

Drive Shaft: Part Number: 26107558894
Torque Specification: 90 Nm (66 lb-ft)

Transfer Case: Part Number: 27107558895
Fluid Type: BMW Transfer Case Fluid (part number: 83222409788)

Differential: Part Number: 33107558896
Fluid Type: BMW Differential Fluid (part number: 83222409789)

Tolerances

Gear Mesh Tolerance: 0.05-0.15 mm

Bearing Clearance: 0.02-0.04 mm

Shaft End Play: 0.1-0.3 mm

Fluid Pressure Tolerance: ±0.5 bar

Service Information Service

Detailed service requirements and schedules for the ZF 8HP transmission

60,000 miles

48 months

Transmission fluid change
Transmission filter replacement
Inspect seals and gaskets

Use only ZF Lifeguard 8 fluid for optimal performance

100,000 miles

84 months

Torque converter inspection
Differential fluid change
Transfer case fluid change

Inspect for leaks and wear during service

Common Questions

Find answers to common questions about torque specifications

What is the torque capacity of the ZF 8HP transmission in the 2015-2021 BMW X1?

The ZF 8HP transmission used in the 2015-2021 BMW X1 has a torque capacity of up to 480 Nm (354 lb-ft). This ensures compatibility with the engine's power output and provides smooth and efficient power delivery.

What type of transmission fluid is recommended for the ZF 8HP transmission?

The ZF 8HP transmission requires ZF Lifeguard 8 transmission fluid, which is specifically formulated for this transmission. The fluid capacity is approximately 9.5 liters (10 quarts) during a full service, including the torque converter.

How often should the ZF 8HP transmission fluid be changed in the BMW X1?

BMW recommends a transmission fluid and filter change every 60,000 to 100,000 miles (96,000 to 160,000 km), depending on driving conditions. Severe driving conditions, such as frequent towing or stop-and-go traffic, may require more frequent service.

What are the common symptoms of a failing ZF 8HP transmission?

Common symptoms include harsh shifting, delayed engagement, transmission slipping, unusual noises (e.g., whining or grinding), and the illumination of the transmission warning light. If any of these symptoms occur, immediate professional diagnosis is recommended.

Can the ZF 8HP transmission be reprogrammed or updated?

Yes, the ZF 8HP transmission can be reprogrammed or updated using BMW's ISTA diagnostic software. Updates may improve shift quality, adapt to driving habits, or address specific technical issues. Reprogramming should only be performed by a certified technician.

Factory Service Resources

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

ZF 8HP Transmission Technical Manual

Coming Soon

Official technical manual from ZF detailing the specifications, maintenance procedures, and troubleshooting for the 8HP transmission.

BMW X1 Service Schedule

Coming Soon

Detailed service schedule for the 2015-2021 BMW X1, including transmission fluid change intervals and other maintenance tasks.

ZF Lifeguard 8 Fluid Specifications

Coming Soon

Technical data sheet for ZF Lifeguard 8 transmission fluid, including compatibility and performance specifications.

BMW ISTA Diagnostic Software Guide

Coming Soon

Comprehensive guide on using BMW's ISTA diagnostic software for transmission reprogramming and diagnostics.

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Technical Information

All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
Vehicle specifications and procedures may vary by model year, trim level, and region.
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