MAN TGX Air Dryer Assembly Knorr-Bremse 81521026370 LA8212 K017711 Euro 5/6

Description:
Genuine Knorr-Bremse air dryer assembly for MAN heavy-duty trucks. This is a complete single chamber air dryer / air processing unit used in the compressed air brake system to remove moisture and contaminants before the air reaches tanks and brake valves. The housing is marked Knorr-Bremse with MAN casting number 81.52402-6370, corresponding to MAN OEM 81521026370 as confirmed by multiple commercial vehicle parts listings and truck breakers. The unit comes fitted with a MANN-FILTER TB 1394/1 air dryer cartridge, a common cartridge used on many European commercial vehicles and specified for MAN TGX applications.

Functionally, the air dryer dehumidifies and cleans compressed air and controls regeneration via an integrated purge valve and heater. It is chassis-mounted on the frame, typically on the left-hand side of MAN TGX tractor units and rigid trucks. The assembly includes the aluminium valve block with multiple threaded air connections, plastic lower cover with purge exhaust, electrical connectors for 24V heater / sensors, and the spin-on MANN TB 1394/1 cartridge. Working pressure is up to approx. 14 bar in line with TB 1394/1 specifications.

This part was removed from a running MAN TGX truck and the operation of the air system was checked on the vehicle prior to dismantling. No leakage or fault codes related to the dryer were present. After removal the unit was visually inspected, basic bench checks were carried out on ports and connectors, and the exterior was cleaned. There are normal signs of service such as oxidation on aluminium, grime on fittings and scuffs on the cartridge shell, but the housing, mounting points, sensor connectors and ports remain in good condition. The supplied cartridge is used and should be treated as a service item; for optimum reliability we recommend replacing it with a new MANN TB 1394/1 or equivalent before returning the vehicle to service.

Compatibility is primarily with MAN TGX Euro 5 and Euro 6 models using Knorr-Bremse LA8212 / K017711 air dryer systems. Various online catalogues and used parts listings reference this OEM number against MAN TGX 18.440, 18.480 and similar variants. It may also fit other MAN TGS/TGX derivatives with the same air system layout, but the buyer must verify part numbers and mounting configuration against the existing unit before purchase.

This is a genuine replacement part ideal for repairing air system moisture problems, purge valve failures or damaged air dryers on MAN heavy trucks without the cost of a new unit. Comes with a 3‑month warranty against mechanical or electrical failure under normal use. Item is in stock and ready for dispatch.

Shipping & Returns:
We ship across UK/EU with tracked services. Returns accepted within 30 days; buyer pays return postage. Please inspect upon arrival and message us with any concerns.

Why Buy From Us:
Genuine part, 3-month warranty, fast dispatch, secure packaging.