2010-2012 Infiniti EX35 IPDM Fuse Box: Solving Crank/No-Start and Electrical Issues
This guide covers the common failures, replacement procedures, and critical compatibility details for the Intelligent Power Distribution Module (IPDM) in your Infiniti EX35.
- The main engine bay fuse box is a computer called the IPDM, and its failure causes common crank/no-start issues and electrical problems.
- Compatibility is crucial: Use a replacement IPDM only from a 2010-2012 EX35 with a 3.5L engine and a 4th VIN digit of 'A'. Match the part number exactly.
- This module is plug-and-play. No dealer programming is required if you use an identical used OEM part, making it a great DIY-friendly repair.
- The most common cause of failure is water damage from clogged cowl drains near the battery; regular cleaning can prevent this expensive repair.
Symptoms of a Failing 2010-2012 EX35 IPDM
A faulty IPDM can be difficult to diagnose because its symptoms often mimic other problems. If your EX35 is experiencing strange electrical issues, the IPDM is a likely suspect, especially if multiple symptoms appear at once.
- Engine Cranks But Won't Start: This is the most common symptom. The engine turns over strongly, but refuses to fire up. This is often caused by the failure of the internal, non-replaceable fuel pump relay inside the IPDM, which prevents the fuel pump from turning on.
- Sudden Stalling: The vehicle may stall unexpectedly while driving, particularly at low speeds or when coming to a stop. This can be intermittent, making it hard to reproduce for a mechanic.
- Random Electrical Failures: You might notice that headlights, wipers, or power windows stop working intermittently or all at once. One headlight might go out, or the cooling fans might run constantly at full speed even when the engine is cold.
- Rough Idle: The engine may idle unevenly or shake while stopped, with the RPMs fluctuating. This can happen if the IPDM isn't providing stable power to the ignition or fuel system relays.
- Warning Lights: A failing IPDM can cause a variety of warning lights to appear on the dashboard, sometimes with no clear pattern. A common diagnostic trouble code associated with IPDM communication failure is U1000.
Known Issues and Common Causes of Failure
While there are no active recalls for the IPDM on the 2010-2012 EX35, there are well-documented common failure points for this component across the Nissan and Infiniti lineup.
Water Intrusion
Warning: The leading cause of IPDM failure is water damage. The IPDM is located in the engine bay near the battery, directly below the cowl and sunroof drains. Over time, these drains can become clogged with leaves, dirt, and other debris. When clogged, rainwater overflows and drips directly onto the IPDM, shorting out its internal circuits.
Prevention: Periodically inspect and clean the cowl area and the drains located under the battery tray. Removing the battery and tray to clear out debris can prevent a costly IPDM failure.
🎬 See how to save your IPDM from water damageInternal Relay Failure
The relays inside the IPDM, especially the one for the ECM and fuel pump, are soldered to the circuit board and are not designed to be serviced individually. After many years and countless cycles, these relays can simply wear out, leading to symptoms like the classic "crank, no start" issue. Because the relays cannot be replaced, the entire IPDM unit must be swapped out.
Buying a Used 2010-2012 EX35 IPDM: What to Look For
A used OEM IPDM is an excellent, cost-effective alternative to an expensive new part. Since these modules are generally plug-and-play for this model year, a used unit can be a straightforward fix. Here’s what you need to know to buy the right one.
1. Verify Vehicle Compatibility
This is the most critical step. A replacement IPDM must come from a vehicle with the same specifications.
- Model Years: 2010-2012 Infiniti EX35 🎬 Watch: Common problems for the Infiniti EX35
- Engine: 3.5L V6 (VQ35HR) only.
- VIN Confirmation: Ensure the donor vehicle's VIN has an 'A' as the 4th digit. This confirms the correct engine configuration for the North American market.
2. Match the Part Number Exactly
Remove your original IPDM and find the part number printed on its case. Your replacement MUST have the exact same OEM part number. Common part numbers for this vehicle include 24312-1BL0A, 24313-1BL0A, and 24372-AL500, though others may exist. Do not rely on a visual match alone; the internal circuitry can differ between part numbers.
3. Perform a Physical Inspection
When buying a used IPDM, inspect it carefully for signs of damage:
- Check for Corrosion: Look for any white, green, or bluish crust on the connectors or pins. This is a clear sign of water damage, and the part should be rejected.
- Inspect the Case: Check for cracks, melted plastic, or any signs of heat damage, especially around the large fuse sockets.
- Ask About the Donor Vehicle: A part from a lower-mileage, collision-damaged vehicle is often a better choice than one from a high-mileage car with existing electrical problems.
IPDM Replacement and Programming
Does a replacement IPDM need to be programmed?
For the 2010-2012 Infiniti EX35, the answer is generally no. As long as you replace your faulty IPDM with a used unit that has the exact same part number, it is a plug-and-play procedure. No special programming or dealer visit is required for the module itself. This is a significant advantage for DIY repair. Later model Infinitis (around 2019 and newer) do require a configuration process after installation, but this does not apply here.
Pro Tip: After disconnecting the battery to perform the swap, you may need to perform simple "re-learn" procedures for systems like power windows (auto up/down) or the idle air volume. These procedures can be found online and do not require special tools.
Cost of a 2010-2012 EX35 IPDM
The cost can vary significantly depending on whether you buy new or used. Labor for this repair is minimal due to its easy access.
| Part Type | Estimated Cost |
|---|---|
| New OEM | $450 - $700+ (Part often sold as a larger assembly) |
| New Aftermarket | $250 - $400 (Availability may be limited) |
| Used OEM | $75 - $200 |
| Shop Labor | $95 - $180 (Typically 0.5-1.0 hour of labor) |
Frequently Asked Questions (FAQ)
Where is the IPDM located on a 2010-2012 Infiniti EX35?
The IPDM is located in the engine compartment on the passenger side, right behind the battery. You will need to remove a plastic cover to access it.
Is the IPDM the same as the BCM?
No. The IPDM (Intelligent Power Distribution Module) is the fuse and relay box in the engine bay that controls power distribution. The BCM (Body Control Module) is a separate computer, usually located inside the cabin, that controls body functions like locks, windows, and interior lights. While they communicate, they are different parts.
Can I just replace a single bad relay inside the IPDM?
No. Infiniti and Nissan do not consider the internal relays to be serviceable. They are soldered directly to the main circuit board. Attempting to de-solder and replace a relay can damage the board and is not a reliable repair. The entire module should be replaced.
Will replacing the IPDM fix my car's "crank, no start" problem?
If the "crank, no start" issue is caused by the IPDM's internal fuel pump relay failing, then yes, replacing the IPDM will fix the problem. However, a "crank, no start" can also be caused by other issues like a bad crankshaft position sensor, a failed fuel pump, or an issue with the anti-theft system. Proper diagnosis is recommended before replacing parts.
Helpful Videos
Technical Specifications
OEM Part Numbers: 24312-1BL0A 243121BL0A 243131BL0A 24372-AL500 24372AL500
Communicates via CAN bus network. Contains integrated, non-serviceable relays for critical vehicle functions.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- INFINITI EX35:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Symptoms of a Failing 2010-2012 EX35 IPDM
- Known Issues and Common Causes of Failure
- Water Intrusion
- Internal Relay Failure
- Buying a Used 2010-2012 EX35 IPDM: What to Look For
- 1. Verify Vehicle Compatibility
- 2. Match the Part Number Exactly
- 3. Perform a Physical Inspection
- IPDM Replacement and Programming
- Does a replacement IPDM need to be programmed?
- Cost of a 2010-2012 EX35 IPDM
- Frequently Asked Questions (FAQ)
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