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BMW Cooling System Parts & Accessories for BMW 3 Series E30 (1984-1991)

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The cooling system is arguably the weakest point in numerous BMWs. If you drive an aging BMW or plan on taking your car to the track like we do, we recommend beefing up your cooling system before going to the track. Generally, the main components in your cooling system that are prone to failure include the following: expansion tank, factory hoses, water pump, thermostat, fan (especially if your vehicle comes factory with a clutch fan), and radiator. Factory BMW expansion tanks are plastic and prone to either breaking off at connection points or combusting. As factory rubber hoses age they either crack or break over time - we offer silicone cooling hose upgrades for most applications to avoid future failures. If you have an older vehicle, your water pump likely comes from the factory with a plastic impeller - we offer upgraded water pumps with metal impellers that are far more reliable. Newer model BMWs utilize electric water pumps - BMW spent millions of dollars engineering these water pumps, but they fail so often that we recommend replacing at 60,000 mile service intervals to avoid being stranded on the side of the road. In terms of thermostats, we offer various upgraded thermostats for racing applications. If your BMW utilizes a clutch fan from the factory, we have several options available in terms of universal electric fans - we recommend replacing these to avoid sending brittle plastic fan blades through your hood. For radiators, we recommend swapping out your radiator for one that does not use plastic connection points like your factory radiator.

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Meyle Radiator Fan Clutch - E12, E24, E28, E30, E34, E36, Z3 ...

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T#:384584

Part#: 11521723918

In Stock

$ 108.99

This product was last offered at the strikethrough price on
06-22-2026

$ 89.99 USD

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$ 89.99 USD

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Quality aftermarket replacement

Condor Speed Shop V2 Fan Mounting Brackets For 16" SPAL Fans ...

T#:577556

Part#: SPALM

Ships in 4 Business Days

$ 66.99 USD

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$ 66.99 USD

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Stainless steel brackets for mounting a 16" SPAL fan on an OEM or aftermarket BMW radiator. The fan can be mounted on either side of the radiator. All mounting hardware is included. Fitment: e30, E36, E46

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Meyle Water Pump - E30/E36/Z3 318i/is/ic/Z3 1.9 with M42/M44 engine ...

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T#:579327

Part#: 3130113400

Ships on Sep 29, 2026

$ 58.99 USD

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$ 58.99 USD

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Includes o-ring, features metal impeller.

Condor Speed Shop SPAL Fan Relay Wiring Harness - E30, E34, E36 ...

T#:28736800

Part#: CSS-SPAL-RWK

Ships in 4 Business Days

$ 98.99 USD

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$ 98.99 USD

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Upgrade your E30 or E36 cooling system effortlessly with the Condor fan relay harness designed specifically for SPAL fans. This harness seamlessly integrates with your existing OEM radiator temperature switch (we recommend the 80/88c E36 sensor), making installation a breeze. Here are the key features of this kit:

Seamless integration with OEM radiator temperature switch Compatibility with SPAL fans for efficient cooling Triggering of the relay when the temperature threshold is met Weatherproof fuse holder for added protection High-temperature wire for reliable performance Durable wire sleeving resistant to abrasion, chemicals, and UV rays Two easy-to-install options for connecting to the BMW radiator temperature switch, labeled for simplicity Experience consistent and effective fan operation with the Condor fan relay harness, ensuring optimal cooling performance for your vehicle.

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Engine Coolant Temperature Sensor (Blue or White Plug) - E30 E28 E24 ...

T#:7255

Part#: 13621357414

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$ 20.99 USD

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$ 20.99 USD

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This is a Bosch coolant temperature sensor (#0280130026) for the fuel injection system. It has a white tip and is rated at 20 degree Celsius & 2500 Ohm.

This item fits the following BMWs:
1984-1985 E30 BMW 318i
1984-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix
1976-1981 E12 BMW 528i 530i
1982-3/1987 E28 BMW 528e 533i
1980-1984 E24 BMW 633csi
1980-1984 E23 BMW 733i

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Radiator

T#:591360

Part#: 17111728905

In Stock at Vendor

$ 399.99

This product was last offered at the strikethrough price on
05-07-2026

$ 388.99 USD

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$ 388.99 USD

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Behr Replacement Radiator - More than likely, you are going to replace the radiator in your vehicle at least once. The joints where the cores meet the end tanks tend to get weak and are the first place to spring a leak. Impacts to the fins themselves can cause holes to form. Corrosion and clogging from the inside can make cooling less than effective and compromise coolant flow.

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FAE Auxiliary Fan Switch 91C - E12, E21, E23, E24, E28, E3, E30, E9 ...

T#:369371

Part#: 61311364272

In Stock

$ 26.37

This product was last offered at the strikethrough price on
06-07-2026

$ 23.63 USD

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$ 23.63 USD

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Does not include o-ring

FAE Auxiliary Fan Switch 99C - E30

T#:369370

Part#: 61311364273

Ships on Aug 12, 2026

$ 24.97 USD

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$ 24.97 USD

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Does not include o-ring

Fan Blade

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T#:594536

Part#: 11521723363

Ships on Nov 27, 2026

$ 32.99 USD

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$ 32.99 USD

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This fan is driven by the belt, engaged by the fan clutch. If you have bad motor mounts, it's quite common for the blades of this fan to make contact with the radiator or radiator shroud, essentially self-destructing the fan into many peices. Be sure to get a new fan clutch, while you are replacing this.

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Engine Coolant Temperature Sensor (Maroon Plug) - E30 318is, 325e/es ...

For vehicles with production date from 09/1985

T#:12657

Part#: 12621710512

In Stock

$ 28.65

This product was last offered at the strikethrough price on
06-19-2026

$ 15.76 USD

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$ 15.76 USD

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This is the is the engine coolant temperature sensor that provides information to the instrument cluster temperature gauge. The insulator has a tan insulator.

This item fits the following BMWs:
1986-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix M3
1991 E30 BMW 318i 318is 318ic
1986-1988 E28 BMW 528e

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Bav Auto Expansion Tank Cap - E36 E46 E34 E39 E32 E38 E65 X3 X5 Z4 ...

T#:640208

Part#: 17117639022

In Stock

Sale - Save 15% $ 13.99

This product was last offered at the strikethrough price on
06-03-2026

$ 11.89 USD

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Qty

Sale - Save 15%

$ 13.99

This product was last offered at the strikethrough price on
06-03-2026

$ 11.89 USD

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This radiator expansion tank cap is used most BMW's from 1991-2006. It is a common failure item. When this item fails, it cannot hold pressure which results in your BMW overheating. If you are overhauling your coolant system, now is the time to consider preventative replacing this cap. It is also referred to as the coolant reservoir cap. From 1974 to 2019, Bavarian Autosport was one of the premier vendors for BMW and MINI auto parts. We are happy to preserve the Bav Auto legacy by continuing to carry their high-quality products into the future. All Bav Auto parts will remain unchanged in design and sourced from the same OEM suppliers to ensure long-lasting reliability. We trust these parts, accessories, and upgrades so confidently that we back every Bavarian Autosport branded component with a 2-year warranty.

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Meyle Expansion Tank Cap

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T#:579357

Part#: 3148009004

In Stock

Sale - Save 40% $ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD

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Qty

Sale - Save 40%

$ 14.99

This product was last offered at the strikethrough price on
05-15-2026

$ 8.99 USD

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Replace worn or missing pieces.

FAE Coolant Temperature Sensor

T#:10784

Part#: 62110788115

Ships in 1 day

$ 13.99 USD

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$ 13.99 USD

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INSTRUMENTS ENGINE COOLANT TEMP SENSOR 62110788115

FAE Temperature Sending Unit - Temperature Gauge (One Prong Spade Typ...

For vehicles with production date up top 09/1985

T#:596552

Part#: 62111268355

Ships in 3 Business Days

$ 13.99 USD

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$ 13.99 USD

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Coolant Thermostat - Includes Sealing Gasket

T#:54852031

Part#: 028 280 0004

Ships on Oct 30, 2026

$ 11.99 USD

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$ 11.99 USD

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This Meyle-Original replacement thermostat is a direct-fit solution designed to maintain a rock-solid, factory-correct 80°C operating temperature.

Engine Water Pump

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T#:594617

Part#: 11519070755

Special Order: No Guaranteed ETA

$ 44.99 USD

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$ 44.99 USD

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The water pump in your vehicle keeps all that coolant flowing freely. If it begins to fail, overheating problems are inevitable. Don't take a chance on doing damage to engine internals by not replacing your water pump.

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Meyle Radiator Hose - Upper - E30

For vehicles with production date from 09/1987

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T#:555679

Part#: 11531722218

Ships on Nov 27, 2026

$ 15.99 USD

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$ 15.99 USD

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Hose from radiator to water pump

Meyle Expansion Tank Cap

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T#:5958735

Part#: 17111742232

Special Order: No Guaranteed ETA

$ 10.99 USD

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$ 10.99 USD

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Wulf Gaertner Autoparts AG manufactures and markets automotive spare parts under its MEYLE brand. Since its foundation in 1958, Wulf Gaertner Autoparts has been an owner-operated, unlisted family business on the aftermarket scene. Since 1995, Wulf Gaertner Autoparts AG has been manufacturing and trading under its MEYLE brand. They pride themselves on top-grade quality-tested spare parts for passenger cars, vans and commercial vehicles. The coolant expansion tank cap keeps necessary pressure on your coolant to increase efficiency. If you have an overheating issue in your vehicle, a simple, quick, and inexpensive part to replace is this cap. Often times, the coolant is not kept under enough pressure to keep it from boiling or expanding too much. This cap keeps all the heat and liquid inside the coolant system for maximum efficiency. Should be replaced each time major coolant system service is performed.

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