BMW B48 F30 Electronic Thermostat Coolant Distribution Module - Used Original Parts
RM 800
Condition: Used (Original)At a Glance
- BMW B48 F30 Electronic Thermostat Coolant Distribution Module - Used Original Parts
- Part number: 11537644811
- Fits: BMW F30 330e, BMW F30 3 Series · confirm by chassis number before ordering
- Used Original · tested working
- RM 800 · final quote via WhatsApp
- M.S. Motor · Kuala Lumpur, Malaysia · ready stock
Diagnosis and Common Symptoms
The B48 engine relies on an electronically controlled thermostat housing (map-controlled thermostat) integrated into the coolant distribution module to regulate coolant flow based on engine load, rather than coolant temperature alone. When this module begins to fail, the DME can no longer accurately manage thermal efficiency, leading to a cascade of drivability issues. Common fault codes associated with this failure include 9CDC, 9CDD, and 9CDA (Electric Coolant Thermostat Performance/Stuck Open or Closed), as well as intermittent P0128 (Coolant Thermostat Below Regulating Temperature). Drivers typically report the temperature gauge fluctuating erratically, fluctuating idle, poor fuel economy, or the engine taking an unusually long time to reach operating temperature. In more advanced failures, coolant leaks may appear at the housing seals, or the vehicle may enter limp mode/reduced power due to the DME losing control over thermal management.
Introduction
This listing offers a Genuine Used BMW B48 Electronic Thermostat Coolant Distribution Module, sourced directly from a low-mileage F30 donor vehicle. Every unit undergoes rigorous bench testing to confirm the electric actuator, sensor circuits, and housing integrity are fully functional before listing. As a genuine BMW component, it retains the exact OE calibration and fitment tolerances required for proper DME communication—something aftermarket replacements often fail to replicate. Buyers can trust this part has been Tested Working, offering a reliable and cost-effective alternative to a new dealer unit.
Product Details
- Brand: BMW
- Model Compatibility: F30 (3 Series) equipped with B48 engine
- Part Name: Electronic Thermostat Coolant Distribution Module
- Condition: Genuine Used (Tested Working)
- Notes:
- Removed from a running, low-mileage donor vehicle
- Electric actuator tested for smooth operation and correct resistance values
- Housing inspected for cracks, warping, or coolant seepage
- Recommend replacing housing seals/gaskets upon installation
Frequently Asked Questions
What symptoms indicate failure?
Common signs include fluctuating temperature gauge readings, illuminated engine management light with thermostat-related fault codes, poor heater performance, rough idle, or a coolant leak visible near the housing.
Does this require coding?
In most cases, no additional coding is required as the module operates based on hardwired sensor feedback to the DME. However, a fault code memory reset (clearing old codes) with a diagnostic tool is recommended after installation to confirm proper operation.
Is this original?
Yes. This is a Genuine BMW part removed from an authentic F30 donor vehicle—not an aftermarket reproduction.
Part price does not include installation. Our workshop can install for you, labour is charged separately and confirmed with you before any work starts.
We cannot diagnose your car over WhatsApp or photos. Not sure this part will solve your problem? Come for a workshop check, diagnosis fee RM180. If you proceed with the repair using our parts, the RM180 is offset into the labour charge. If you decide not to repair, only the RM180 applies.
All parts are tested and guaranteed to work. Whether a part solves your car's problem can only be confirmed by diagnosis.
Shipping: from Kuala Lumpur, West Malaysia ~RM50, East Malaysia ~RM80 (estimate, confirm via WhatsApp). Delivery 1-2 working days in secure anti-static packaging.
Warranty: 30-day exchange for control units, engines, gearboxes and other major parts; 14 days for small parts. Claims require proof of installation by a qualified workshop. No warranty for items opened, modified, or damaged by wrong installation.
Prices vary with stock and part condition. Final price via WhatsApp.
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