17746 Views Updated 9 November 2026

K040605N50 S3 Knorr-Bremse Compatible Air Processing Unit Repair Kit

301.03.0070.05

Summary

This air processing unit repair kit is designed for the professional overhaul of air brake systems. It is compatible with Knorr-Bremse systems and provides the necessary components to renew air treatment units in heavy commercial vehicles, ensuring reliable air regulation and distribution. Equivalent to OE Knorr-Bremse K040605N50S3.

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 air processing unit repair kit serves as a critical service set for the in-place overhaul of units that dry, regulate, and distribute compressed air within a heavy commercial vehicle's air brake system. By utilizing high-strength components, this kit allows for the renewal of heavily loaded components without the need for a complete unit replacement.

Compatibility and application

The kit is compatible with Knorr-Bremse systems. It is designed to address various maintenance needs, including sealing element replacement, spring renewal, or valve part servicing to ensure optimal pneumatic performance within the braking circuit.

Installation and maintenance guidance

When performing maintenance, technicians should ensure surface cleanliness and use correct lubricants during assembly. It is vital to follow the vehicle manufacturer's service manual for exact tightening torque values to ensure the longevity of the repair. Check the compatibility list to confirm fitment.

System maintenance importance

Regular inspection of the air treatment unit can prevent pressure loss between circuits or water accumulation in the system. Selecting a high-quality repair kit helps maintain the integrity of the entire pneumatic braking system.

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 K040605N50S3.

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 included in an air processing unit repair kit?

Depending on the specific application, these kits typically include O-rings, gaskets, piston seals, springs, diaphragm assemblies, or purge valve parts to facilitate a complete overhaul.

How can I know if my air processing unit needs a repair kit?

Symptoms such as water collecting in the system, pressure drift in regulators, or pressure loss between circuits often indicate that a repair kit is required.

Is this kit suitable for all brake systems?

This specific kit is designed for air processing units within heavy commercial vehicle brake systems and is compatible with Knorr-Bremse systems.

Can I use a gasket kit instead of a complete overhaul kit?

Yes, gasket and O-ring kits are suitable for sealing group repairs if mechanical parts like pistons and springs remain in good condition.

What are the OE reference numbers of this part?

301.03.0070.05 directly replaces Knorr-Bremse OE number K040605N50S3.