Genuine BMW E3 Radio Interference Suppression Kit – NOS – 65311351581

Genuine BMW New Old Stock radio interference suppression kit, manufactured by BERU for selected BMW E3 New Six models.

The German product description “Entstörsatz” refers to a suppression kit designed to reduce electrical and ignition interference affecting the vehicle’s radio reception. The kit contains several suppressors, capacitors, grounding components and a metal shielding housing intended for installation at different electrical components in the engine compartment.

This rare original kit is supplied with its period BMW packaging and original BERU installation instructions.

Product details

• Product: Radio interference suppression kit
• Alternative description: Electrical noise suppression kit
• German description: Entstörsatz
• Manufacturer: BERU
• Supplied by: Genuine BMW
• BMW part number: 65311351581
• Formatted BMW number: 65 31 1 351 581
• Short reference number: 1351581
• BERU instruction reference: 06-3173
• Application: Original radio and electrical interference suppression
• Installation position: Various locations in the engine compartment
• Condition: New Old Stock
• Quantity supplied: One kit
• Required quantity per vehicle: One kit

Function

Electrical components such as the ignition system, alternator and electric motors can generate electromagnetic interference. In classic vehicles, this may be heard through the radio as crackling, whining or other unwanted noise.

The components in this kit are intended to suppress this interference through a combination of:

• Electrical suppression capacitors
• Additional grounding connections
• Braided earth straps
• Metal shielding around an electrical component
• Dedicated mounting hardware
• Connections shown in the original BERU installation instructions

Vehicle compatibility

The original BMW packaging identifies the kit for selected BMW E3 New Six models, including:

• BMW 2500
• BMW 2800
• BMW 3.0 S

The accompanying BERU installation sheet also refers to BMW E3 models from this family. Application may depend on the vehicle’s production date, engine equipment, ignition system, alternator and installed radio.

This kit should not automatically be assumed to fit BMW E9 coupé models or later BMW vehicles, even where similar M30 engines or electrical components were used.

Always compare the BMW part number, individual components and installation instructions with the vehicle before ordering.

BMW and reference numbers

• 65311351581 – BMW radio interference suppression kit
• 65 31 1 351 581 – Formatted BMW catalogue number
• 1351581 – Short BMW reference number
• 06-3173 – Reference printed on the BERU installation instructions
• 863/1 – Additional number printed on the original BMW box

Condition

Genuine New Old Stock kit that appears never to have been installed.

Because of its age and long-term storage, the following must be considered:

• The original BMW cardboard box is heavily worn, torn and partially open
• The box has staining, handwriting and storage damage
• The installation instructions are yellowed, folded and worn
• Metal components may show light oxidation or storage marks
• Electrical components and capacitors have not been function-tested
• Braided grounding straps show age-related discolouration
• The black metal shielding housing has storage marks and minor paint wear
• Small components may have moved or become separated inside the damaged packaging

The kit is sold exactly as shown in the photographs. Completeness against the original factory contents cannot be guaranteed due to the opened and damaged packaging.

Included

The sale includes the photographed components, including:

• Black metal shielding housing
• Attached electrical lead and connector
• Braided grounding strap
• Multiple BERU suppression capacitors and electrical components
• Additional grounding and connecting leads
• Mounting bolts and toothed washers
• Original BERU installation instructions
• Original BMW cardboard box
• All other components visible in the photographs

Only the photographed parts are included. No additional wiring, radio, ignition components, alternator, tools or installation materials are supplied.

Important quantity information

One suppression kit is used per compatible vehicle.

This listing is for one NOS kit, supplied exactly as photographed.

Installation recommendation

Before installation:

• Compare all components with the original BERU installation instructions
• Verify compatibility with the vehicle’s electrical and ignition system
• Check the old capacitors and suppressors electrically before use
• Inspect all cables, connectors and insulation for age-related deterioration
• Clean the mounting and grounding surfaces
• Confirm that every earth connection has good metal-to-metal contact
• Replace any unsafe or deteriorated electrical component
• Preserve the original instructions and packaging for documentation

Installation should be performed by someone familiar with classic automotive electrical systems. Incorrect installation or deteriorated electrical components may cause faults or ineffective interference suppression.

Storage location: 202