Skip to product information
SKU:
NLT2T03655
Ships for free in 2–4 business days.
S1B031 Turbocharger 174799 for John Deere 4120 4320 Tractors
$506.09
In Stock
$506.09
Sale price
$506.09
Regular price
Replace a worn S1B031 turbocharger on the applicable John Deere 4120 or 4320 tractor with an assembly referenced by 174799.
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- John Deere 4120 and 4320 agricultural tractors with matching S1B031 turbo configuration
- Original listing indicates 2002-2004 applications, verify actual model year and engine
Product Overview
A properly operating turbo provides the airflow needed for a diesel engine to maintain output under load. Worn bearings, damaged compressor blades and oil-control faults can create low boost or excessive exhaust smoke, but fuel and intake faults should be ruled out too.
Key Features & Performance
- S1B031 turbocharger assembly
OE / Reference Numbers
- S1B031
- 174799
Common Reasons for Replacement
- Low boost
- Turbo shaft noise
- Turbo oil leakage
Fitment & Installation Notes
Match turbo ID plate, flange orientation, oil connections and engine serial rather than relying on the tractor model alone.
Frequently Asked Questions
Is this a genuine OEM part? No. This is an aftermarket replacement unless otherwise explicitly stated. Brand and reference numbers identify the intended original part or application.
How do I confirm it will fit? Match turbo ID plate, flange orientation, oil connections and engine serial rather than relying on the tractor model alone.
Part Summary
keywords: S1B031 Turbocharger 174799 for John Deere 4120 4320 Tractors, S1B031, 174799, motor vehicle engine parts, John Deere 4120 and 4320 agricultural tractors, Original listing indicates 2002-2004 applications, verify actual model year and engine
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.