17746 Views Updated 9 November 2026

LA 8609 S3 Knorr-Bremse Compatible Air Processing Unit Repair Kit

301.03.0070.05

Summary

This Air Processing Unit Repair Kit is designed for the maintenance of heavy commercial vehicle air brake systems. It is compatible with Knorr-Bremse systems, providing high-strength components to ensure reliable air regulation and distribution within the braking circuit. Equivalent to OE Knorr-Bremse LA8609S3.

Product identifiers
EAN Code	8683457012530

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Compatible OEM Codes

KNORR-BREMSE
- RPLA2100 S3
- LA 8646 S3
- LA 8645 S3
- LA 8644 S3
- LA 8643 S3
- LA 8642 S3
- LA 8641 S3
- LA 8640 S3
- LA 8639 S3
- LA 8638 S3
- LA 8637 S3
- LA 8636 S3
- LA 8635 S3
- LA 8627 S3
- LA 8625 S3
- LA 8617 S3
- LA 8610 S3
- LA 8609 S3
- LA 8608 S3
- LA 8607 S3
- LA 8606 S3
- LA 8605 S3
- LA 8600 S3
- K116880N50 S3
- K116879N52 S3
- K116879N50 S3
- K116878N52 S3
- K116878N50 S3
- K116877N52 S3
- K116877N50 S3
- K116876N52 S3
- K116876N50 S3
- K116875N52 S3
- K116875N50 S3
- K116874N52 S3
- K116874N50 S3
- K116873N52 S3
- K116873N50 S3
- K116872N52 S3
- K116872N50 S3
- K116871N52 S3
- K116871N50 S3
- K116870N52 S3
- K116870N50 S3
- K116869N52 S3
- K116869N50 S3
- K044300N50 S3
- K044300N03 S3
- K044300 S3
- K043684N50 S3
- K040608N50 S3
- K040607N50 S3
- K040607N03 S3
- K040607 S3
- K040606N50 S3
- K040606N03 S3
- K040605N50 S3
- K040605N03 S3
- K040604N50 S3
- K040604N03 S3
- K040604 S3
- K039120N50 S3
- K039120N03 S3
- II38617FN00 S3
- II38617FM5 S3
- II38617F S3
- II38610FM5 S3
- II38610F S3
- 484460186000 S3
- 286370 S3
- 274746 S3
- 1100586000R S3
- 1100586000 S3

Description

What does an air processing unit repair kit do?

This repair kit serves as a critical service solution for the in-place overhaul of air treatment units that dry, regulate, and distribute compressed air. By utilizing high-strength components, these kits help restore the efficiency of the pneumatic system without requiring a full unit replacement. They are essential for maintaining the integrity of the air brake system in heavy commercial vehicles.

Compatibility and application

These kits are compatible with Knorr-Bremse systems. They provide a comprehensive solution for technicians addressing issues like pressure drift or air leakage. Whether addressing the dryer section or the pressure regulator, using a dedicated kit ensures that all necessary sealing elements and internal components are replaced simultaneously.

Installation and maintenance guidance

During installation, ensure that all surfaces are clean and use only the specified lubricant to ensure long-term durability. It is important to follow the correct tightening torque for all fasteners to prevent future leaks in the pneumatic circuit. Always consult the vehicle manufacturer's service manual for specific maintenance intervals and technical values.

Troubleshooting and service

Regular inspection of the air processing unit can prevent significant pressure losses within the braking system. When symptoms like water accumulation or inconsistent pressure thresholds appear, a targeted repair kit can restore optimal performance to the heavy commercial vehicle.

OE cross-reference

301.03.0070.05 (Air Processing Unit Repair Kit) is the equivalent of the Knorr-Bremse OE number. This part directly replaces Knorr-Bremse OE number LA8609S3.

Other OEMs

KNORR-BREMSE

LA8646S3
LA8645S3
LA8644S3
LA8643S3
LA8642S3
LA8641S3
LA8640S3
LA8639S3
LA8638S3
LA8637S3
LA8636S3
LA8635S3
LA8627S3
LA8625S3
LA8617S3
LA8610S3
LA8609S3
LA8608S3
LA8607S3
LA8606S3
LA8605S3
LA8600S3
RPLA2100 S3
LA 8646 S3
LA 8645 S3
LA 8644 S3
LA 8643 S3
LA 8642 S3
LA 8641 S3
LA 8640 S3
LA 8639 S3
LA 8638 S3
LA 8637 S3
LA 8636 S3
LA 8635 S3
LA 8627 S3
LA 8625 S3
LA 8617 S3
LA 8610 S3
LA 8609 S3
LA 8608 S3
LA 8607 S3
LA 8606 S3
LA 8605 S3
LA 8600 S3
K116880N50 S3
K116879N52 S3
K116879N50 S3
K116878N52 S3
K116878N50 S3
K116877N52 S3
K116877N50 S3
K116876N52 S3
K116876N50 S3
K116875N52 S3
K116875N50 S3
K116874N52 S3
K116874N50 S3
K116873N52 S3
K116873N50 S3
K116872N52 S3
K116872N50 S3
K116871N52 S3
K116871N50 S3
K116870N52 S3
K116870N50 S3
K116869N52 S3
K116869N50 S3
K044300N50 S3
K044300N03 S3
K044300 S3
K043684N50 S3
K040608N50 S3
K040607N50 S3
K040607N03 S3
K040607 S3
K040606N50 S3
K040606N03 S3
K040605N50 S3
K040605N03 S3
K040604N50 S3
K040604N03 S3
K040604 S3
K039120N50 S3
K039120N03 S3
II38617FN00 S3
II38617FM5 S3
II38617F S3
II38610FM5 S3
II38610F S3
484460186000 S3
286370 S3
274746 S3
1100586000R S3
1100586000 S3

Related Products

Used In

Compatible Vehicles

Compatible Vehicles
Brand	Model	Model Type	Engine
DAF
IVECO
KNORR-BREMSE

FAQ

What is the primary function of this repair kit?

It provides a service set for the overhaul of units that dry, regulate, and distribute compressed air within a heavy commercial vehicle's brake system.

Which systems is this kit compatible with?

This kit is designed to be compatible with Knorr-Bremse systems used in heavy commercial vehicle braking applications.

When should a technician use a repair kit instead of a new unit?

A repair kit is a sensible way to renew heavily loaded components when mechanical parts are still sound, avoiding the cost of full replacement.

What symptoms indicate that an air processing unit needs service?

Symptoms include pressure thresholds drifting, water collecting in the system, or audible leaks from the outer housing.

What are the OE reference numbers of this part?

301.03.0070.05 directly replaces Knorr-Bremse OE number LA8609S3.