17746 Views Updated 9 November 2026

K116873N50 S3 Knorr-Bremse Compatible Air Processing Unit Repair Kit

301.03.0070.05

Summary

This Air Processing Unit Repair Kit is designed for the in-place overhaul of air treatment units in heavy commercial vehicles. It ensures the efficient drying, regulation, and distribution of compressed air within the brake system. Compatible with Knorr-Bremse systems to maintain optimal pneumatic performance. Equivalent to OE Knorr-Bremse K116873N50S3.

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 is an Air Processing Unit Repair Kit?

An Air Processing Unit Repair Kit is a service set for the in-place overhaul of the unit that dries, regulates and distributes compressed air within a heavy commercial vehicle's air brake system.

System function and benefits

This kit provides a cost-effective solution for renewing heavily loaded components without requiring a full unit replacement. These kits are essential for maintaining the integrity of the pneumatic circuit, ensuring that air pressure is regulated and moisture is effectively removed from the system to prevent pneumatic failures.

Installation and maintenance guidance

When performing an overhaul, technicians should focus on surface cleanliness and use the correct lubricants to ensure long-lasting results. For optimal performance, always follow the manufacturer's specific tightening torque values during installation to prevent leaks or pressure drift in the regulator or valve sections.

Troubleshooting and selection

Whether you are addressing moisture accumulation in the dryer section or pressure loss in the regulation stage, selecting the correct service kit is vital for heavy commercial vehicle safety. Check the compatibility list.

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 K116873N50S3.

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 main purpose of an air processing unit repair kit?

It allows for the in-place overhaul of air treatment units by providing necessary seals, springs, and valve parts to renew components that dry, regulate, or distribute air.

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

A repair kit is an economical choice when mechanical parts are still sound and only sealing elements, O-rings, or specific valve components need replacement.

Can this kit be used to fix moisture issues in the air system?

Yes, specific dryer section service kits are designed to address moisture accumulation by replacing cartridge gaskets and purge valve parts.

What should be checked during installation?

Technicians should ensure surface cleanliness and use correct lubricant and controlled tightening torque to guarantee the longevity of the repair.

What are the OE reference numbers of this part?

301.03.0070.05 directly replaces Knorr-Bremse OE number K116873N50S3.