BMW Coolant Expansion Tanks for BMW 7 Series E23 (1978-1987)

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On certain models, namely E36, E46, and E90, the factory BMW expansion tank is prone to either breaking at connection points or blowing apart altogether. If you're starting to feel like your expansion tank is on borrowed time, it's probably time to replace with either a direct OE replacement, or strengthen your cooling setup with an aluminum expansion tank - we offer numerous performance upgrades for your expansion tank. Especially if you're someone who likes to track your BMW, we recommend upgrading your expansion tank to avoid ruining your track day.
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Coolant Level Sensor - E30 325e,5/84/86, E28, E24, E23
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:10545
Part#: 61311375715
Ships in 3 Business Days
3% off MSRP $ 92.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 89.99 USD
Free Shipping
3% off MSRP
$ 92.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 89.99 USD
Free Shipping
Got a low coolant level warning light on the dash? We recommend you check this coolant level sensor as it is often the cause of erroneous warning lights.
This item fits the following BMW's:
5/1984-1986 E30 BMW 325e 325es
5/1984-1988 E28 BMW 524td 528e 533i 535i 535is M5
5/1984-1988 E24 BMW 633csi 635csi
5/1984-1987 E23 BMW 733i 735i
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Expansion Tank - E23
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:22500
Part#: 17111178251
Ships in 9 Business Days
5% off MSRP $ 231.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 219.99 USD
Free Shipping
5% off MSRP
$ 231.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 219.99 USD
Free Shipping
Genuine BMW EXPANSION TANK.--

This item fits the following BMWs:
BMW 7 Series - 733i, 735i, 745i

--. Fits BMW Engines including:
M30

Coolant Level Sensor - 109mm Long
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
URO - Corporate Logo
T#:380458
Part#: 61311375715
Ships in 2 Business Days
$ 15.99 USD
Free Shipping on orders $49 and up
Replace your coolant level sensor and ensure that your levels are accurately monitored

2 Pin Connector
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
ECS - Corporate Logo
T#:33412932
Part#: 61132359999
Ships on Jul 28, 2026
Sale - Save 25% $ 10.99

This product was last offered at the strikethrough price on
05-03-2026

$ 8.24 USD
Free Shipping on orders $49 and up
Sale - Save 25%
$ 10.99

This product was last offered at the strikethrough price on
05-03-2026

$ 8.24 USD
Free Shipping on orders $49 and up

Includes connector housing with terminals and seals. Commonly used for the coolant level sensor.

ECS Tuning replacement harness connectors include all necessary pins and wire seals for a complete harness repair. Whether you have a broken harness connector or need a complete wiring repair, we have the components you need.

Each connector includes an additional terminal in case one becomes lost or damaged during installation.

*OEM cross reference PN# 61132359999 - Commonly used for the coolant level sensor.

Please reference the original part number from the existing connector to confirm fitment, before ordering.

Suggested tools:

Suggested crimping pliers: T#387193
Wire De-pin tools:
12pc De-Pin Tool Set - T#386379
23pc De-Pin Tool Set - T#641943

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