Genuine BMW M30 Thermostat Housing, 2 Sensor Ports (11531710959)

Original BMW aluminum thermostat housing for M30 inline-six engines. This is a used housing with two threaded openings for temperature sensors or switches.

The housing carries casting number 1 250 351.9. This is a casting number and not the complete orderable BMW part number.

BMW used different thermostat housings, sensor configurations and electrical connections depending on model, market and production date. Always compare the housing, hose connections and sensor-port configuration before ordering.

Details

• Part: Thermostat housing
• Manufacturer: BMW
• Manufacturer type: Genuine OEM
• Engine family: BMW M30 inline-six
• Material: Aluminum
• Condition: Used
• Casting number: 1 250 351.9
• Sensor openings: 2 threaded ports
• Temperature sensors: Not included
• Supplied exactly as shown in the photographs

BMW Thermostat Housing Part Numbers

The number 1 250 351.9 cast into the housing is a production casting number. Associated BMW thermostat-housing numbers include:

• 11531250352 — 11 53 1 250 352
• 11531263058 — 11 53 1 263 058
• 11531271475 — 11 53 1 271 475
• 11531272703 — 11 53 1 272 703
• 11531272870 — 11 53 1 272 870
• 11531278187 — 11 53 1 278 187
• 11531710959 — 11 53 1 710 959

The principal documented replacement sequence is:

11531250352 → 11531272870 → 11531278187 → 11531710959

The other numbers are related BMW catalog variants. Interchangeability may depend on the vehicle, production date, hose arrangement and required sensor configuration.

Vehicle Compatibility

This thermostat-housing family was used on various classic BMW models with M30 engines, including:

• BMW E3: 2500, 2800, 3.0 S, 3.0 Si, 3.3 L and 3.3 Li
• BMW E9: 2.5 CS, 2800 CS, 3.0 CS, 3.0 CSi and 3.0 CSL
• BMW E12: 525, 528, 528i, 530i and 535i
• BMW E23: 728, 728i, 728iS, 730, 732i, 733i, 735i and 745i
• BMW E24: 628 CSi, 630 CS, 633 CSi and 635 CSi
• BMW E28: 525i, 528i, 533i, 535i and M535i
• BMW E32: 730i, 730iL, 735i and 735iL with M30 engine
• BMW E34: 530i and 535i with M30 engine

This compatibility list applies to the broader thermostat-housing family. The two-port sensor configuration is not automatically correct for every listed vehicle.

Condition

Used original BMW part with visible age-related wear, oxidation, discoloration, dirt and previous installation marks. The housing has not been refurbished.

The sealing surfaces, threads and hose connections should be cleaned and inspected before installation.

Important Notes

• This version has two threaded sensor openings
• No temperature sensors or switches are included
• Compare the number and position of the sensor openings with the original housing
• Compare all hose outlets, mounting points and electrical requirements before ordering
• Check the casting for corrosion and inspect all threads before installation
• Installation with new gaskets and sealing rings is recommended
• Thermostat, housing cover, sensors, gaskets and mounting hardware are included only when visible in the photographs
• Professional installation is recommended
• Original BMW component suitable for restoration, replacement or spare-part use