Switchable LED Retrofit Bulb Set H4 ALLSEASON. Porsche 911 / 964 / 924 / 944 / 968 / 928 / 914  ❭  641932HB

LEDriving HL ALLSEASON H4 LED Retrofit Bulb Set
Sold as a pair

The LEDriving HL ALLSEASON H4 LED retrofit lamp set is OSRAM’s first all-season off-road LED replacement designed to upgrade conventional H4 halogen high and low beam bulbs. This advanced LED lighting solution delivers significantly improved brightness and durability while offering the flexibility of two selectable colour temperatures for optimal visibility in different driving conditions.

Fits:

• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC
• Porsche 911 1984-1986 3.2L
• Porsche 911 1987-1989 3.2L G50
• Porsche 911 1975-1977 3.0L Turbo (930)
• Porsche 911 1978-1989 3.3L Turbo (930)
• Porsche 964 (911) C2 1989-93
• Porsche 964 (911) C4 1989-93
• Porsche 964 (911) RS 3.6L 1991-93
• Porsche 964 (911) RS 3.8L 1991-93
• Porsche 964 (911) TURBO 3.3L 1991-93
• Porsche 964 (911) TURBO 3.6L 1991-93
• Porsche 924 2.0L 1976-79
• Porsche 924 2.0L 1980-85
• Porsche 924 Turbo 2.0L 1979-81
• Porsche 924 Turbo 2.0L 1982-84
• Porsche 924 Carrera GT 2.0L 1981
• Porsche 924 Carrera GTS 2.0L 1982
• Porsche 924S 2.5L 1986-87
• Porsche 924S 2.5L 1988
• Porsche 944 2.5L 8V 1982-87
• Porsche 944 2.7L 8V 1988-89
• Porsche 944S 2.5L 16V 1987-88
• Porsche 944S2 3.0L 16V 1989-91
• Porsche 944 Turbo 2.5L 8V 1985-88
• Porsche 944 Turbo 2.5L 8V 1989-91
• Porsche 944 Turbo S 2.5L 8V 1988
• Porsche 968 3.0L 1992-94
• Porsche 968 Sport 3.0L 1994-95
• Porsche 968 CS 3.0L 1993-95
• Porsche 968 Turbo S 3.0L 1993-94
• Porsche 928 4.5L 1978-82
• Porsche 928S 4.7L 1981-83
• Porsche 928S2 4.7L 1984-86
• Porsche 928S4 5.0L 1987-92
• Porsche 928GT 5.0L 1989-91
• Porsche 928GTS 5.4L 1992-95

These LED retrofit lamps are designed for 12V vehicle electrical systems and feature integrated CANbus technology to help prevent dashboard error messages that can occur when replacing halogen bulbs with LEDs.

What These LED Retrofit Lamps Do

These OSRAM LED bulbs replace traditional H4 halogen headlight bulbs and provide improved lighting performance using modern LED technology.

Key benefits include:

• Increased brightness compared with standard halogen bulbs
• Optimised beam pattern for improved road illumination
• Switchable colour temperature for different weather conditions
• Reduced electrical load compared with conventional bulbs
• Long service life thanks to advanced LED technology

Important Legal Notice

These LED retrofit lamps do not have ECE approval and must not be used on public roads in any exterior application. Use on public roads may lead to cancellation of the vehicle’s operating licence and possible loss of insurance coverage.

Use of these products may be restricted or prohibited in certain countries. Please check local regulations before installation.

This combination improves night-time visibility and overall lighting performance.

Switchable Colour Temperature for All-Season Visibility

A unique feature of the OSRAM LEDriving HL ALLSEASON lamps is the ability to switch between two colour temperatures depending on driving conditions.

6,000 K Cool White
Provides bright modern illumination with strong contrast and improved long-distance visibility.

2,700 K Warm White
Produces a yellowish light that improves visibility in poor weather conditions such as rain, fog or snow. This colour tone is also ideal for creating a classic appearance on vintage vehicles.

Advanced Thermal Management

LED lighting systems require efficient heat management to maintain performance and reliability. These lamps use OSRAM’s advanced cooling technology featuring an integrated high-speed fan.

This active cooling system helps:

• Maintain optimal operating temperatures
• Ensure consistent brightness
• Extend LED lifespan
• Support reliable long-term performance

Long Service Life and OSRAM Quality

OSRAM LED technology delivers up to five times the service life compared with traditional halogen bulbs. This means fewer replacements and improved reliability over time.

Each pair of lamps includes a 5-year OSRAM manufacturer guarantee.

Installation and Compatibility

The compact design allows installation in many headlight housings where H4 bulbs are normally used. With the wide range of compatible OSRAM accessories, installation can be simplified for different vehicle applications.

Integrated CANbus electronics help reduce the likelihood of bulb error warnings on compatible vehicles.

Vehicle Compatibility

Suitable for vehicles using H4 high and low beam bulbs in a 12V electrical system.

Ideal Applications

• Off-road vehicles
• Track cars
• Classic car builds
• Show vehicles
• Motorsport applications