Skip to product information
Usually ships in 2–4 business days.
1645453903 1645453900 Fuel Injector For Kubota L4400 L4600 L4610 L4630 L4740
$48.49
Sale price
$48.49
Regular price
Available to Order
This Fuel Injector is a replacement fuel injector compatible with Kubota L4400, L4600, L4610, L4630, and L4740 tractors and matches OEM Part# 1645453903 and 1645453900.
Need help finding the right part? Talk with a parts expert today.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I needed a forklift part and wasn’t sure which one fit. They asked for the model and serial number, got back to me quickly, and made sure I ordered the right one. Really helpful.
Randy W. — Verified customer
Product Overview
This Fuel Injector delivers precise fuel atomization for Kubota L-series diesel engines, ensuring efficient combustion and optimal power output. Designed for utility tractors, it restores engine performance and reduces emissions in agricultural and property maintenance applications.
Key Features & Performance
- Precision-machined nozzle for consistent fuel spray pattern
- Direct OEM replacement with part numbers 1645453903 and 1645453900
- Constructed from high-grade steel for long service life
- Factory calibrated to meet Kubota specifications
- Reduces smoke and improves fuel economy
Fitment & Compatibility
- Kubota L4400 Tractor
- Kubota L4600 Tractor
- Kubota L4610 Tractor
- Kubota L4630 Tractor
- Kubota L4740 Tractor
Common Uses
- Replacement for worn or clogged injectors on Kubota diesel tractors
- Restoring engine power and starting reliability
- Use in farming, mowing, towing, and loader operations
- Suitable for both manual and hydrostatic transmission models
Technical Specifications
- Part Number(s): 1645453903, 1645453900
- Product Type: Fuel Injector Nozzle Assembly
- Injection Pressure: 1850 psi (approx.)
- Number of Holes: 4
- Thread Size: M12 x 1.25
Frequently Asked Questions
Q: Do I need to replace all injectors at once? A: While it is recommended to replace injectors in sets for balanced performance, a single faulty injector can be replaced individually if the others are in good condition.
Q: Will this injector work on other Kubota engine models? A: This injector is specifically designed for L4400, L4600, L4610, L4630, and L4740 tractors; always verify engine compatibility using part numbers before installation.
Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.