Genuine BMW M30 Complete Thermostat Housing 1972 (11531250352)

Original BMW M30 thermostat housing assembly with a casting date from 1972. This early-style aluminium housing has one sensor port and is supplied with one installed single-terminal temperature sender.

The assembly also includes the original four-bolt thermostat cover and bleed screw. It is especially suitable for the restoration or repair of early BMW models fitted with an M30 inline-six engine.

Details

• Part: Complete thermostat housing assembly
• Manufacturer: BMW
• Manufacturer type: Genuine OEM
• Engine family: BMW M30 inline-six
• Casting period: 1972
• Material: Aluminium
• Condition: Used
• Sensor ports: 1
• Sensors included: 1 installed single-terminal sender
• Thermostat cover: Included
• Cover type: Early four-bolt version
• Bleed screw: Included
• Supplied exactly as shown in the photos

BMW Thermostat Housing Part Numbers

The applicable early BMW thermostat housing number is:

• 11531250352 — 11 53 1 250 352

Later replacement numbers within this thermostat-housing family include:

• 11531272870 — 11 53 1 272 870
• 11531278187 — 11 53 1 278 187
• 11531710959 — 11 53 1 710 959

The casting number and production markings on the housing may differ from the BMW catalogue number.

Thermostat Cover Part Numbers

The included early four-bolt thermostat cover is associated with:

• 11531250356 — 11 53 1 250 356 — original number
• 11531714861 — 11 53 1 714 861 — later replacement number

Bleed Screw Part Numbers

The installed M8 bleed screw is associated with the following BMW numbers:

• 11531250705 — 11 53 1 250 705
• 11531287019 — 11 53 1 287 019
• 11531275881 — 11 53 1 275 881 — later replacement number

Installed Temperature Sender

One used single-terminal temperature sender is installed.

Based on its connector style and the early M30 application, it may correspond with:

• 62110788115 — 62 11 0 788 115
• Replaced by 62111268355 — 62 11 1 268 355

The number and function of the installed sender could not be confirmed from its markings. The sender is therefore included as pictured, without a guarantee regarding its exact part number, calibration or operation.

Potential Vehicle Applications

This early single-sensor-port version is primarily associated with early BMW M30-powered models, including selected versions of:

BMW E3

• BMW 2500
• BMW 2800
• BMW Bavaria
• BMW 3.0 S
• BMW 3.0 Si
• BMW 3.0 L and 3.0 Li

BMW E9

• BMW 2800 CS
• BMW 3.0 CS
• BMW 3.0 CSi
• BMW 3.0 CSL

Later versions of this thermostat-housing family were also used on selected BMW E12, E23, E24 and E28 models. However, later vehicles may require a different number of sensor ports, different senders or alternative hose connections.

Always compare the housing shape, mounting flange, hose outlets, sensor configuration and BMW part number with the original component before ordering.

Related Service Parts

Depending on the exact application, the following service parts may be required:

• 11531250357 — thermostat-cover gasket
• 11531250399 — thermostat O-ring
• 11531251041 — 80°C thermostat

These service parts are not included unless clearly shown in the product photos.

Condition

This is an original, used BMW component. It shows visible age- and use-related wear, including oxidation, surface discolouration, dirt, coolant residue and corrosion on some steel fasteners.

The housing, cover, bleed screw and installed sender are supplied exactly as pictured. The sensor has not been electrically tested.

The presence, temperature rating and condition of any thermostat inside the closed housing have not been confirmed. A thermostat is therefore not expressly included or guaranteed.

Important Information

• Clean and inspect the assembly thoroughly before installation
• Check the housing and cover for corrosion, cracks and damaged sealing surfaces
• Carefully inspect the bleed screw before attempting removal due to visible corrosion
• Fit a new gasket and O-ring during installation
• Verify the installed sender against the vehicle’s wiring and instrument system
• Compare all hose connections and mounting points with the original housing
• Professional installation and cooling-system pressure testing are recommended
• Supplied exactly as shown in the photos

Ideal as an original-period component for an early BMW M30 restoration, particularly where the correct 1972 casting and single-sensor configuration are important.