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Welcome to the DISCO4.COM Knowledge Base - this is currently in development, but please add and edit content and report back any difficulties you have or additions you feel it needs!

See the Help for more assistance.

Common Topics

• Acronyms - Common Acronyms used on/for the Discovery and for DISCO3.CO.UK
• Modifications - Enhance your D3/4 to suit your needs
• Frequently Asked Questions
• TOPIx Technical Reference (was GTR)
• Before buying a D3 / D4
• EPB Issues
• EPB Emergency Release
• Fuel Burning Heater (FBH)
• Hard Reset
• Hints & Tips - Useful things to help you get the best out of Discovery 3 and 4
• Suspension Knocking (especially at the rear) ? ARB Bushes - Fix
• Terrain Response - Settings Explained
• Maintenance - Keep your Discovery running smoothly
• Diagnostic Codes - Fault Codes database
• Model Years
• Technical Documentation
• Litigation - Litigation letter templates to LR for engine failures
• VIN Details
• Wheels and Tyres
• Awards - Awards given to the D3 & D4
• Charging through towing socket
• IIDTool
• Low Pressure fuel pump diagnosis A comprehensive guide to your Low Pressure fuel system.

D4

• D4 Manuals - Comprehensive workshop manuals for the D4 broken into chapters includes 2.7L Lion TDV6 diesel, 3.0L Lion TDV6 diesel, 4.0L V6 petrol and 5.0L V8 petrol engines.
• D4 Service schedule - See pdf here

D3

• Discovery 3 Models and Specifications (UK)
• ZFS6-53 Manual Gearbox PDF images Manual Gearbox Parts list
• [6HP26 gearbox spare parts.](PDF)
• Part Numbers - D3 Common
• Known Issues & Fixes from MY05 Onwards
• Parts required for OEM Hybrid TV install
• Accessory Fitting
• Owner Information Mirror
• Technical Service Bulletins