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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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Bav Auto Spill-Proof Coolant / Antifreeze Funnel

T#:580395

Part#: B8800082

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Sale - Save 15% $ 32.99

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

$ 28.04 USD

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$ 28.04 USD

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Multiple adapters include to fit a variety of vehicles.

Bav Auto Fan Clutch Wrench - 32mm

T#:580348

Part#: B8800019

In Stock

Sale - Save 20% $ 29.99

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

$ 23.99 USD

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Sale - Save 20%

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This product was last offered at the strikethrough price on
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$ 23.99 USD

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Used to remove your fan clutch

Radiator / Cooling System Pressure Tester- Bavarian Autosport ...

T#:580397

Part#: B8800084

In Stock

Sale - Save 15% $ 146.99

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

$ 124.94 USD

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$ 146.99

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

$ 124.94 USD

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Bav Auto Fan Pulley Holder

T#:580358

Part#: B8800031

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

$ 20.39 USD

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

$ 20.39 USD

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Used to remove your fan clutch

Bav Auto Angled Hose Pinch Plier Set - 2pc

T#:580379

Part#: B8800058

In Stock

Sale - Save 25% $ 32.99

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

$ 24.74 USD

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This product was last offered at the strikethrough price on
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Angled jaws close, creating a complete seal every time you use them - the jaws are offset, making it possible to use in hard-to-reach locations. Made of glass-filled nylon for extra strength. These are perfect for use with brake lines, etc.

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DO88 Coolant Hoses - Red - E30 M3

T#:13924862

Part#: DO88KIT130R

Ships on Aug 6, 2026

$ 342.99 USD

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Made out of high-quality silicone, these hoses display the highest levels of durability and quality. With three to five layers of armor, the hoses are designed to withstand high pressure and heat for an extended period of time. The OE hoses are known to crack and leak but this hose kit eliminates any chance of that.

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DO88 Coolant Hoses - Blue - E30 M3

T#:13924864

Part#: DO88KIT130B

Ships on Aug 6, 2026

$ 342.99 USD

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$ 342.99 USD

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Made out of high-quality silicone, these hoses display the highest levels of durability and quality. With three to five layers of armor, the hoses are designed to withstand high pressure and heat for an extended period of time. The OE hoses are known to crack and leak but this hose kit eliminates any chance of that.

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BMW E30 S14 Coolant Hoses - Black - DO88

T#:13924861

Part#: DO88KIT130S

Ships on Aug 6, 2026

$ 342.99 USD

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$ 342.99 USD

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BMW E30 S14 Coolant Hoses - Black - DO88 are engineered from high-quality silicone, offering superior durability and reliability for the BMW E30 S14. With three to five layers of reinforced silicone, these hoses are built to withstand high pressure and extreme temperatures, ensuring long-lasting performance.

High-Quality Silicone Construction: Made from premium silicone, providing excellent resistance to heat and pressure.
Reinforced Layers: Features three to five layers of armor, enhancing durability and reliability under demanding conditions.
Prevents Cracking and Leaking: Upgrades from OE hoses that are prone to cracking and leaking, ensuring a secure and leak-proof fit.
Extended Service Life: Designed to handle high temperatures and pressures for prolonged use, reducing the need for frequent replacements.
Enhanced Performance: Improves cooling system efficiency, maintaining optimal engine performance and reliability.

Turner Motorsport’s BMW E30 S14 Coolant Hoses - Black - DO88 offer a high-quality replacement solution, ensuring your BMW E30 S14 operates smoothly and reliably.

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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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$ 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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