MAHLE Original Alternator Carbon Brush Set (Pair) - Part Number: 37916770134

The MAHLE Original alternator carbon brush set (part number 37916770134, OEM references MGX 1674/S, MGX1674S, JX322, F0320JX322) is an OEM-grade electrical contact pair designed to restore peak charging conductivity and rotor field excitation in alternators fitted to agricultural tractors, combines, commercial vehicles, and industrial diesel equipment. Engineered to original MAHLE / Letrika / Iskra and Bosch specifications, this kit provides a high-conductivity copper-graphite sintered structure that guarantees uniform, progressive wear without arc pitting. Replacing worn brushes restores consistent electrical contact against rotor slip rings, preventing intermittent charging drop-outs and extending the alternator's operational lifespan.

Key Features & Engineering Advantages

• OEM MAHLE / Letrika Quality: Manufactured to stringent original equipment metallurgical standards, providing optimal conductivity, low electrical resistance, and exact dimensional tolerances.
• Sintered Copper-Graphite Matrix: Premium compound formulation balances electrical transfer efficiency with low friction, minimizing thermal buildup and eliminating brush sparking.
• Controlled Progressive Wear: Protects copper rotor slip rings from premature grooving, excessive abrasion, and surface scoring.
• Heavy-Duty Flexible Leads & Pressure Springs: Highly flexible stranded copper braids and calibrated springs maintain constant contact pressure under severe engine vibrations and temperature fluctuations.
• Broad Cross-Reference Fitment: Serves as a direct OEM-equivalent replacement for original Iskra/Letrika references (MGX 1674/S, 16.770.134) and Bosch aftermarket standards (JX322, F0320JX322).

Technical Specifications

OEM Cross Reference Table & Applications

Manufacturer / Brand	Interchangeable Reference Numbers
MAHLE / ISKRA / LETRIKA	MGX 1674/S, MGX1674S, 16.770.134, 16770134
BOSCH	JX322, F 032 0JX 322, F0320JX322
Machinery Applications	Agricultural tractors, harvesters, construction machinery, and industrial diesel gensets fitted with Iskra, Mahle, or Bosch alternators

Installation Advice & Workshop Notes: Always disconnect the negative battery terminal before dismantling the alternator brush holder. When replacing brushes, desolder the existing wires cleanly and remove all debris from the holder guide slots. Inspect the rotor slip rings: if deeply grooved or blackened, polish them with fine abrasive cloth or turn them on a lathe. Verify that the new brushes slide freely in their guides without binding before completing soldering, taking care not to let solder wick excessively up the flexible braided wire.