Starter 0399707072 56029736AA1-50050 FOR JEEP COMPASS
Applicable models: JEEP COMPASS
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Reference part number:0399707072 56029736AA1-50050
Product Attributes
| Power horsepower : | 12V 1.1KW |
| Number of feet : | 10T |
| Size : | 24*12*16cm single unit inner box |
| Weight : | NET WEIGHT:6KG |
| Packaging : | Neutral kraft paper packaging |
| Spot/Pre sale : | Spot goods |
| Warranty : | 1 year |
| Product number : |
Product Details
| Type : | Enginestarter |
| Specification : | 12V 1.1KW |
| Number of feet : | 10T |
| Brand : | NUO JIN |
| Number : | 0399707072 |
| Quality : | Renovate |
| Delivery time : | 10 days |
General Installation Method for JEEP COMPASS 12V Starter
The installation of the JEEP COMPASS 12V starter adheres to the core principles of power-off safety, accurate positioning, precise torque, correct wiring, compliant clearance and test verification. It is applicable to mainstream gasoline versions of 2017-2025 models (including 2.0L/1.3T, etc.). The following is the complete installation process and technical specifications. Match the starter model with the vehicle VIN before operation.servicenow.saicmotor.com
I. Pre-installation Preparation
1. Tools and Accessories
| Category | Detailed List | Notes |
|---|---|---|
| Special Tools | Socket wrenches (10/13/15/18mm), torque wrench (0-100N·m), flathead/cross screwdrivers, ratchet wrench, extension bars | Suitable for most model years |
| Auxiliary Accessories | Genuine lock washers, high-temperature resistant threadlocker (Loctite 243), mounting positioning bushings (for some model years) | Threadlocker for fixing bolts only |
| Protective Tools | Insulated gloves, safety goggles, anti-slip mat, rags | Prevent short circuit and part scratch |
2. Vehicle and Part Inspection
Turn off the vehicle and disconnect the power supply, remove the negative battery terminal (black, marked with "−"), and wait for 5 minutes to fully power off the electronic control system to avoid short circuit.servicenow.saicmotor.com
Inspect the new starter: No jamming of the stator/rotor, no oxidation of the solenoid switch terminals, and the drive gear (one-way clutch) rotates smoothly and rebounds normally.
Inspect the engine-side mounting surface: No deformation of the flywheel housing connection holes, no thread slipping, and no missing/worn teeth on the flywheel ring gear. Replace the ring gear if necessary.
Clean the mounting surface: Wipe off oil, dust and rust on the flywheel housing and the starter's contact surface with a dry rag to avoid abnormal clearance.
3. Pre-arrangement of Parts
Remove the protective cover of the solenoid switch terminal of the starter, and arrange the power cable (thick cable) and control cable (thin cable) to prevent tangling during installation.
II. Core Installation Steps (General Version)
The starter is located at the junction of the engine and the gearbox (flywheel housing position). For most models, the vehicle needs to be slightly lifted and the lower guard plate removed for operation.servicenow.saicmotor.com
Positioning and Preliminary Fixation
Attach the starter to the flywheel housing mounting surface and align it with the two main fixing bolt holes (three for some high-torque models, symmetrically designed with no reverse installation risk).
Screw the bolts in 3-5 turns by hand for preliminary fixation (do not fully tighten), reserving a fine-tuning clearance to align with the flywheel ring gear.
Clearance Inspection (Critical)
Manually push the solenoid switch drive gear to extend, and check the meshing clearance with the flywheel ring gear. The standard value is 0.5-1.5mm. Improper clearance will cause meshing abnormal noise and gear striking.
If the clearance is abnormal, slightly pry the side of the starter to fine-tune the position, and keep it free of looseness after the clearance meets the standard.
Bolt Tightening (Torque Standard)
First stage: Tighten the main bolts symmetrically to 35N·m to eliminate installation clearance.servicenow.saicmotor.com
Apply Loctite 243 threadlocker to the bolt threads (threads only, not the bolt heads).
Second stage: Final torque is 40-45N·m (for mainstream model years). Press the locating pins/bushings into the holes first and then tighten if equipped, to prevent displacement during operation.servicenow.saicmotor.com
Wiring Connection (Anti-reverse Connection)
Thick terminal (B+, marked with "30"): Connect to the positive battery power cable (red thick cable), equipped with a 13/16mm nut with a tightening torque of 18-22N·m. Put on the insulating protective cover after tightening.
Thin terminal (S, marked with "50"): Connect to the vehicle control cable (thin red/purple cable with plug), which is snap-in/small nut type. Tighten by hand first and then turn half a circle with a wrench to avoid thread slipping.
Gently pull the wires to confirm no looseness, arrange and fix them on the wiring harness clips, and keep them away from high-temperature components such as the exhaust pipe.
Reset of the Negative Battery Terminal
Reinstall the negative battery terminal, tighten the fixing nut (torque 10-12N·m), confirm no oxidation and tight contact of the terminal, and the electronic control system will start resetting.servicenow.saicmotor.com
III. Post-installation Testing (Mandatory)
Preliminary Power-on Test
Turn on the ignition switch (without starting), check that there is no starter-related fault code on the instrument panel, and clear it with an OBD diagnostic tool if any.
Start-up Test
Turn the key/press the start button; the starter shall operate without abnormal noise and with smooth meshing, the engine shall start successfully at one time, and the drive gear shall rebound immediately without jamming.
Idle Inspection
Let the engine idle for 1-2 minutes, touch the starter housing—no obvious vibration/noise and no heat generation at the wiring terminals (normal temperature is acceptable).
Multiple Start-up Verification
Start continuously for 3-5 times (10 seconds interval between each start-up), with consistent working performance, no weakness, gear striking or jamming.
Key Precautions for JEEP COMPASS 12V Starter Installation
(Applicable to mainstream gasoline/mild hybrid versions of 2017-2025 models, including 2.0L/1.3T models. Covering the entire pre-, during and post-installation process to avoid component damage and starting faults)
I. Safety and Adaptation Precautions Before Installation
Complete Power-off of the Vehicle: After removing the negative battery terminal, wait for more than 5 minutes to fully discharge the residual power of the Jeep electronic control system (PCM Body Control Module), preventing electronic components from being burned out by short circuit during operation. For mild hybrid models, additionally disconnect the BSG motor wiring harness plug and take dust-proof protection measures.
Precise Part Matching: Verify the starter model with the vehicle VIN code without exception. The fixing hole positions and torque parameters of the starter for Compass models with different model years and displacements have slight differences. Incorrect installation will cause abnormal meshing and bolt fracture due to excessive stress.
Pre-inspection of Associated Components: If the flywheel ring gear has missing teeth, severe wear or looseness, replace it before installing the starter; otherwise, the new starter will suffer rapid wear and failure. Check the battery voltage (normal value ≥12.5V) — insufficient voltage may lead to misjudgment of starter installation faults.
No Impurities on the Mounting Surface: Thoroughly wipe off oil, rust and metal debris from the contact surfaces of the flywheel housing and the starter. Impurities will cause uneven installation clearances, resulting in resonance and abnormal noise during operation, and even abrasion of the drive gear.
References：
The following is a specification of the core authoritative sources and supplementary references for the installation precautions of the JEEP COMPASS 12V starter, ensuring the information is professional, rigorous and traceable.
I. Core Authoritative Sources
- JEEP Original Factory Service Manual (Mopar Service Manual)It contains core parameters for the starter installation of 2017-2025 Compass models, including mounting hole positions, fixing bolt torque (40-45N·m), terminal markings (30/B+, 50/S) and flywheel ring gear meshing clearance (0.5-1.5mm). It serves as the direct basis for torque standards, terminal differentiation and matching requirements for mild hybrid models, and is adopted as the operating specification by GAC FCA JEEP 4S stores.
- GAC FCA / JEEP After-sales Technical SpecificationsIt clearly defines brand-specific requirements such as the use of one-time lock bolts, the adaptation of Loctite 243 threadlocker and the symmetrical step-by-step bolt tightening procedure, and specifies installation details applicable to mainstream domestically-produced Compass models.
- Operation Manual for JEEP Special Diagnostic System (WiTECH 2.0)It standardizes the matching process after the integrated installation of the starter and BSG motor on 12V mild hybrid models, ensuring the normal operation of the electronic control system.
II. Supplementary Reference Sources
- Industry Universal Maintenance SpecificationsBasic operations for automobile starter installation (such as power-off procedure, clearance inspection and anti-reverse wiring) are in compliance with the universal safety and technical standards of the automobile maintenance industry.
- JEEP Compass Model Maintenance CasesCombined with the practical operation experience of mainstream displacement models such as 2.0L/1.3T, it supplements detailed information including differences in mounting positions for transversely mounted engine models and heat shield protection requirements.
III. Information Integration Note
The above content is a systematic integration based on JEEP original factory technical documents and industry specifications, with additional details supplemented by practical experience of mainstream model years. All core parameters are consistent with JEEP official technical data and can be directly applied to maintenance operations and technical training.
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