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Type :
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Starter
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Specification :
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12V，3.2KW
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Number of feet :
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9T
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Brand :
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nuojin
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Number :
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4807375
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Quality :
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NEW
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Delivery time :
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30day
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Overview of the LRS00944 Starter Motor
This LRS00944 starter motor is the 12V, 3.2 kW replacement for Fiat, Iveco applications. The housing, drive end and terminal positions follow the original design, so the unit bolts straight onto the bell housing and reuses the existing cabling.
Because the motor is only used in short bursts, heat builds up quickly and escapes slowly. A starter that has worked for years in traffic or on site will show heat-hardened resin, shortened brushes and a pitted solenoid contact long before the windings fail.
Key Specifications
- Rated voltage: 12V
- Rated output: 3.2 kW
- Pinion: 9 teeth
- Type: reduction gear starter with pre-engaged solenoid
- Application: Fiat, Iveco
- Net weight: approximately 8.5 kg
- Condition: new, direct replacement for the original unit
A 12V 3.2 kW rating is the output the motor can hold while cranking, not a peak figure. It is sized so the engine reaches starting speed on the first or second revolution, which is what makes a healthy start feel immediate.
A pre-engaged solenoid pushes the pinion into mesh before the main contact closes, which prevents the tooth damage that occurs when a motor spins up against a stationary ring gear.
Reference Numbers and Cross References
The reference family for this starter covers the numbers listed here:
- 4807375
- 417213
- 5003332711
- 0001367014
- MT71Z
- 63216831
- 4755109
- 63217121
- MS224
- 4702248
- 0001359091
- LRS00944
Several numbers in this list belong to complete starter assemblies while others refer to the motor only. A visual check of the drive end protects against the most common ordering error. This starter is listed with 12 references in total.
Matching the Unit to the Vehicle
This starter family was fitted to a range of the manufacturer applications, and the part number changed as engines and flywheels were revised. The unit listed here covers the references above and is a direct replacement where those numbers match. This applies in particular to the LRS00944 supplied for Fiat, Iveco.
A mismatched pinion is the most common cause of a starter that engages noisily or refuses to mesh. Compare the tooth count before fitting, not after.
Common Failure Patterns
Most failures start at the solenoid contact. Each start switches the full cranking current through a copper disc, and after thousands of cycles that disc pits and burns. The result is the familiar single click with no rotation, or a delay before the motor turns.
The brush plate is the second common failure point. Brushes shorten gradually, spring pressure falls, and contact becomes intermittent. Cranking speed drops a little every week until the engine refuses to start on a cold morning. This applies in particular to the LRS00944 supplied for Fiat, Iveco.
Diagnostic Signs
- Cranking that sounds normal but takes longer than it used to
- Several attempts needed before the motor engages
- Black carbon dust inside the drive end housing
- Voltage dip that dims the lights during cranking
- Starter that responds to a tap on the housing but not to the key alone
Rule out the simple causes first: battery capacity under load, corroded terminals and the signal wire at the solenoid. A starter that clicks with a known-good battery and a clean signal circuit has an internal contact fault. Fitting the LRS00944 correctly takes less time than diagnosing the original fault.
Before You Fit the Replacement
- Condition of the old pinion and ring gear before the new unit goes in
- Main cable continuity and the condition of the lug at the starter stud
- Battery voltage while cranking, measured at the battery posts
- Mounting face cleanliness and bolt condition
- That the replacement terminal layout matches the original harness
Most comebacks after a starter replacement trace back to something that was not checked before the unit went on: a tired battery, a corroded earth or a chipped ring gear. Ten minutes with a multimeter and a torch prevents the second repair.
Fitting Guidance
Raise and support the vehicle where the starter is reached from below, disconnect the battery, and detach the main cable and signal wire. Note the cable positions before removal so the replacement goes back the same way.
After fitting, confirm the pinion returns freely and the cables are clear of the exhaust. Crank once before the first drive, then re-check the main terminal for tightness after the first heat cycle. The LRS00944 ships with its solenoid fitted, so no parts have to be transferred from the old unit.
Quality Control and Supply from Hejian Nuojin Auto Parts Co., Ltd.
Each production batch is inspected for housing dimensions, terminal integrity and pinion fit, and every starter is bench tested before it is boxed. Units ship in neutral cartons with foam protection, which keeps freight damage low and allows distributors to label stock under their own brand.
Common references are kept in stock for fast dispatch, volume orders are delivered in around 30 days and each starter carries a one-year warranty against manufacturing defects.
Frequently Asked Questions
Can I test the starter on the bench?
Yes. Apply battery voltage to the main stud and the signal terminal and check that the pinion throws and the motor turns. A clamp meter reading against the rated current will show whether the unit is drawing too much.
Why does the starter work cold but fail when hot?
Heat raises solenoid resistance and reduces brush spring pressure. Both effects build up gradually and appear first on a hot restart.
How long should a replacement starter last?
There is no fixed interval, but a starter fed by a healthy battery and a clean earth path will outlast one that is repeatedly cranked on a low battery.
Does the starter need any maintenance?
No routine maintenance is required. Keeping the battery, terminals and earth connections clean is what extends starter life in practice.
Installation of 12V, 3.2KW Starter for Fiat and Iveco: The core steps are power-off first, clean the mounting surface, tighten bolts to torque, connect wires correctly, and finally conduct power-on test. Below are the complete procedures and key points.
Turn off the ignition switch and disconnect the negative battery cable to prevent short circuit and accidental start-up.Confirm that the new starter is 12V, 3.2KW, compatible with the corresponding Fiat/Iveco model, with no damage to the appearance, and the overrunning clutch and solenoid switch function normally.
Prepare socket wrenches, torque wrenches, flathead/crosshead screwdrivers, brushes, cleaning agents, copper gaskets (if needed), etc.Clean the installation area (the junction of the engine and gearbox), remove oil stains, rust and impurities to ensure the mounting surface is flat and well-fitted.
The starter is usually located on the side of the engine flywheel housing. Align it with the mounting holes, slowly place it in position and initially align the bolt holes to avoid collision with the flywheel ring gear and starter drive gear.
Insert the fixing bolts, pre-tighten them in a cross-symmetric manner, then tighten them to the specified torque with a torque wrench (35-45N·m is common for Iveco, refer to the vehicle maintenance manual for specific values) to prevent deflection of the mounting surface or bolt breakage.
First, connect the thin control wire plug of the starter solenoid switch to ensure it is securely clamped without loosening.Then connect the main power wire (thick wire), control the torque of the terminal nut at 14.7-17.7N·m to avoid loosening of the wire harness or damage to the terminal.Check that the wires have no damage or aging, are securely fixed, and have no interference.
Reconnect the negative battery cable and confirm the ignition switch is in the off position.Turn the key to the start position, observe whether the starter runs smoothly without abnormal noise, and whether the drive gear can normally mesh with the flywheel and drive the engine to start; if there are problems such as gear grinding or idling, cut off the power immediately for troubleshooting.
Core Precautions for Installation of 12V, 3.2KW Starter for Fiat/Iveco
Disconnect the negative battery cable throughout the installation process to prevent short circuit, mechanical pinch or electrical burnout caused by accidental start-up of the starter; do not reconnect the negative cable until the wiring is completed, and ensure no tools or debris interfere with the surroundings during testing.
The starter terminals are high-voltage and high-current terminals; avoid direct contact of hands with metal terminals during installation; if the engine has just stopped, wait for the flywheel housing area to cool to room temperature to prevent scalding.
Thoroughly clean oil stains, rust and sealant residues on the engine flywheel housing and starter flange surface to ensure complete fitting of the contact surface; otherwise, it may lead to uneven stress and breakage of bolts, or jitter during starter operation.
Use original specification bolts (usually M10/M12 high-strength bolts) and prohibit replacement with ordinary bolts;Tighten step by step in a cross-symmetric manner, and the final torque must strictly comply with vehicle model requirements (35-45N·m for most Iveco models, 30-40N·m for some Fiat models); loose bolts may fall off, and over-tightening may cause flange cracking.
After installation, manually turn the crankshaft and observe the meshing state of the starter drive gear and flywheel ring gear: no jamming and no excessively large clearance (normal clearance is 0.5-1.5mm); if there is abnormal meshing noise, re-adjust the installation position or replace worn parts.
The main power wire (thick red/black) is connected to the main terminal (marked "30") of the starter solenoid switch, and the control wire (thin blue/yellow) is connected to the trigger terminal (marked "50"); reverse connection is strictly prohibited, otherwise it will burn the solenoid switch or the whole vehicle fuse;Control the tightening torque of the terminal nut at 14.7-17.7N·m; loose nuts may cause heating and ablation, and over-tightening may strip the threads.
The starter housing is grounded through the flange and the engine/flywheel housing; if there is paint or oxide layer on the contact surface, it must be polished off; for some models, check whether the ground wire is firm; poor grounding will cause weak operation or failure to start of the starter.
Confirm that the starter power (3.2KW), voltage (12V) and mounting hole spacing are fully compatible with the vehicle model (e.g., the starter mounting interfaces of Iveco Daily and Fiat Ducato are different); avoid forced installation to prevent flange dislocation.
If there are gaskets/O-rings at the starter flange, confirm that there is no loss or damage; apply a small amount of sealant during installation (only for non-gasket positions) to prevent engine oil from leaking into the starter interior.
It is forbidden to conduct power-on test when the starter is not fixed, as the drive gear may swing and be damaged when popping out; during vehicle test, the single start time shall not exceed 5 seconds, and the interval between two starts shall be at least 15 seconds to prevent overheating and burnout of the starter.
Arrange the power wire and control wire neatly, fix them in the non-high-temperature area of the engine with clips, avoid interference and friction between the wire harness and moving parts such as flywheel and pulley, and prevent insulation layer damage and short circuit.
References：
Applicable models: Iveco Daily (including Euro4/Euro5 series), Fiat Ducato (same-platform models), and other models equipped with 12V starters.
Key source chapter: Engine Electrical System - Removing/Refitting Starter Motor, which clearly requires disconnecting the negative battery cable before installation, cross-tightening bolts (torque 35-45N·m), and specifications for terminal tightening, consistent with the previous content.
Issuing body: IVECO Technical Publications, manual numbers such as Iveco Daily F1A/F1C Engine Maintenance Manual (related to Part Number).
Source: Maintenance operation guidelines (e.g., Op.-related disassembly and assembly procedures) on Fiat's official after-sales platform (
aftersales.fiat.com), covering safety specifications such as starter electrical connection, grounding requirements, and function testing.
Same-platform correlation: Fiat Ducato shares the powertrain with Iveco Daily, so the starter installation specifications are universal, and the manual content can mutually confirm each other.
Source: Maintenance technical articles on platforms such as Auto Master, PCauto, and Autohome, e.g.,
How to Correctly Install a Starter and
Precautions for Starter Replacement, which summarize common safety operations and fault troubleshooting points in frontline maintenance (e.g., troubleshooting logic for starter failure to rotate and abnormal meshing noise).
Features: Based on original factory manuals and practical experience, convert specifications into easy-to-understand operation points, highly consistent with the previous content.
Source: Installation guidelines from starter supporting manufacturers (e.g., Bosch, Valeo), specifying details such as wiring sequence and torque parameters (e.g., 14.7-17.7N·m for main power terminals) for 12V, 3.2KW starters, supplementing the parameter refinement needs of original factory manuals.
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