Throttle Lever Control Spring Assembly 203-43-52163 for Komatsu Excavator PC100-5 PC100-6 PC120-5 PC120-6 PC130-5 PC130-6

Throttle Lever Control Spring Assembly 203-43-52163 for Komatsu Excavator PC100-5 PC100-6 PC120-5 PC120-6 PC130-5 PC130-6

This throttle body assembly is engineered as a direct replacement for the Komatsu Excavator PC100-5 PC100-6 PC120-5 PC120-6 PC130-5 PC130-6. Manufactured to meet or exceed OEM specifications, it delivers reliable performance in demanding conditions. Each unit is tested for fuel flow, pressure rating, and durability before leaving the factory to ensure consistent quality across every order.

Vehicle Compatibility

Replaces OEM Part Numbers

203-43-52163 • 2034352163 • 203-43-52162 • 2034352162

Signs You Need a Replacement

If your equipment is showing any of these symptoms, the throttle body may be the cause:

• Surging or fluctuating idle speed — The throttle plate or motor is sticking, causing the ECU to hunt for the correct idle position. This is the most common early symptom.
• Reduced throttle response — A dirty or worn throttle body doesn’t open smoothly. You’ll notice a dead spot or hesitation when you press the pedal.
• Check engine light with P0121 or P1545 — These codes indicate a throttle position correlation error. If cleaning doesn’t clear them, the throttle body needs replacement.
• Limp mode activation — The ECU limits engine speed when it can’t trust the throttle position signal. This safety mode prevents damage but limits operation.
• High idle that won’t come down — Carbon buildup holds the throttle plate slightly open. The ECU compensates by raising fuel trim, which may trigger adaptive mixture codes.
• Stalling at low RPM — When the throttle body can’t maintain a stable idle, the engine may stall at stoplights or when shifting from drive to reverse.

Post-Installation Adaptation

After installing the new throttle body, perform a throttle adaptation so the ECU learns the new zero and full-throttle positions. With VCDS or equivalent: go to Engine, Basic Settings, channel 060 or 098 (varies by ECU), and follow the on-screen prompts. Without a diagnostic tool, use the manual method: turn the key ON (engine off) for 60 seconds, then OFF for 10 seconds. Start the engine and let it idle for 3 minutes without touching the accelerator. Do not rev the engine during this process.

Frequently Asked Questions

Will this fit my Komatsu PC100-5?
Yes. This part is designed to fit the Komatsu PC100-5, PC100-6, PC120-5, PC120-6 among other models listed in the compatibility table above. Verify your specific model and engine code before ordering to ensure the correct fit.

Can I cross-reference 203-43-52163 with 2034352163?
Yes. Both 203-43-52163 and 2034352163 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions.

How do I check if my engine code (PC100, PC120, PC130, PC100L) matches?
The engine code is stamped on a metal tag attached to the engine block, usually near the timing belt cover or on the cylinder head. Compare the code you find with the list above. Engine codes are 3 to 6 characters long.

Do I need to do a throttle adaptation after installing this?
Yes. After installing the new throttle body, run a throttle adaptation (basic setting) so the ECU learns the new zero and full-throttle positions. With VCDS: Engine, Basic Settings, Group 060 or 098. Without a diagnostic tool: key ON for 60 seconds, OFF for 10 seconds, then start and idle for 3 minutes without touching the gas pedal.

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