29073-02 29073-04E Truck Seat Air Lumbar Switch 3-Button Control Valve LH for ISRI 6860 NTS1 for MAN IVECO Volvo Adjustment
Truck Seat 3-Button Lumbar Control Valve (LH) Specs
OEM Part Numbers: 29073-02, 29073-04E, 2907302, 2907304E
Cross References: IS.857870 (ISRI Reference), 42538404 (IVECO Alt)
Seat Model Compatibility: Fits ISRI 6860 NTS1, 6860/885 Series Air Seats
Truck Compatibility: for MAN (TGA/TGX), IVECO (Stralis), Volvo (FH/FM), Scania
Control Zones: 3-Button Pneumatic Adjustment (Triple Zone Lumbar)
Mounting Position: Left Hand (LH) Side of the Seat
Includes: Pre-assembled Air Hose Bundle with Quick-Connect Fittings
Condition: 100% Brand New Industrial Grade Aftermarket Component
Product Highlights
LH Specific Design: Specifically engineered for left-hand side mounting, ensuring the button ergonomics and air line exits align perfectly with LH seat frames.
Triple Zone Comfort: Restores full functionality to your seat's upper, middle, and lower lumbar bladders for customized orthopedic support.
Pre-Wired Air Bundle: Comes with the complete air line set pre-attached, significantly reducing installation time and effort.
High-Durability Housing: Made from high-impact ABS and precision pneumatic valves to handle the rigors of long-haul driving.
⚠️ IMPORTANT: BUYER'S GUIDE (TECHNICAL VERIFICATION)
LEFT SIDE (LH) ONLY: This model is for the left side of the seat. For the Right Hand (RH) version, please search for OE **29074-02**.
ICON MATCHING: Verify that your original switch has the 3 lumbar icons shown in our images.
PNEUMATIC SYSTEM: This is a pure air valve for pneumatic lumbar bladders. It is NOT an electrical switch for motorized lumbar systems.
SEALING CHECK: During installation, ensure all air lines are pushed fully into the quick-connect ports to prevent slow leaks.
Comprehensive Application Matrix
Truck/Seat Brand |
Compatible Models |
for ISRI Seats |
6860 NTS1 Series (Common in Euro 4/5/6 Trucks) |
for MAN TRUCKS |
TGA, TGS, TGX Series (Driver or Passenger LH) |
for IVECO TRUCKS |
Stralis, Eurocargo, Trakker (Driver or Passenger LH) |
for VOLVO TRUCKS |
FH, FM, FMX (Equipped with ISRI Seats) |
Package Includes: 1x 3-Button Lumbar Adjustment Valve (LH) with Integrated Air Hose Bundle



