BMW Cooling System Parts & Accessories for BMW E30 M3 S14 2.3L

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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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Water Hose Set - E30 M3
Water Hose Set - E30 M3
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Packaged by Turner - Corporate Logo
T#:3449
Part#: 11531309667KIT
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$ 167.05 USD
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$ 167.05 USD
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This pacakge of six rubber cooling hoses for the E30 M3 includes most of the commonly replaced coolant lines on the S14. Set includes -
  • upper radiator hose from the large metal coolant pipe, #23 in the diagram
  • top thermostat hose to the large metal coolant pipe, #15 in the diagram
  • middle thermostat hose (T-shaped) to the small metal coolant pipe and to the water pump, #13 in the diagram
  • lower thermostat hose to the bottom of radiator, #22 in the diagram
  • lower radiator hose to coolant pipe, #24 in the diagram
  • expansion tank hose to the small metal coolant pipe, #17 in the diagram
    We use a mix if OE BMW and aftermarket hoses that we trust. This is the original E30 M3 Cooling Hose kit that we have been selling for 20 years. Looking for hose clamps too? We have OEM-style clamps for these too, select this in the options list below.

    This item fits the following BMWs:
    1988-1991 E30 BMW M3
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    Turner OEM Water Hose Set - E30 M3
    Turner OEM Water Hose Set - E30 M3
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Packaged by Turner - Corporate Logo
    T#:338252
    Part#: 11531309667KIT
    Ships in 4 Business Days
    Sale - Save 3% $ 212.99

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

    Starting at $ 206.38 USD
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    Sale - Save 3%
    $ 212.99

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

    Starting at $ 206.38 USD
    Free Shipping
    Add to Wish List
    This pacakge of six rubber cooling hoses for the E30 M3 includes most of the commonly replaced coolant lines on the S14. Set includes -
  • upper radiator hose from the large metal coolant pipe, #23 in the diagram
  • top thermostat hose to the large metal coolant pipe, #15 in the diagram
  • middle thermostat hose (T-shaped) to the small metal coolant pipe and to the water pump, #13 in the diagram
  • lower thermostat hose to the bottom of radiator, #22 in the diagram
  • lower radiator hose to coolant pipe, #24 in the diagram
  • expansion tank hose to the small metal coolant pipe, #17 in the diagram
    We use a mix if OE BMW and aftermarket hoses that we trust. This is the original E30 M3 Cooling Hose kit that we have been selling for 20 years. Looking for hose clamps too? We have OEM-style clamps for these too, select this in the options list below.

    This item fits the following BMWs:
    1988-1991 E30 BMW M3
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    Complete Cooling System Overhaul Package - 1988-1991 E30 M3
    Complete Cooling System Overhaul Package - 1988-1991 E30 M3
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Packaged by Turner - Corporate Logo
    T#:338650
    Part#: TMS16418
    Ships in 1 day
    Starting at $ 713.99 USD
    Add to Wish List
    Starting at $ 713.99 USD
    Add to Wish List
    This cooling package for the E30 M3 consists of all of the major components on the S14's cooling system. There are no major weak points to the E30's cooling system, unless you count skipped maintenance. The entire system is serviceable in individual components so you don't need to buy a complete package of parts. Many of the indivdual parts are on our site but we have setup this package to cover all or most of what you would need to perform a major overhaul. This overhaul package consists of an Genuine BMW radiator and then you build the package from there. Add hoses, sensors, water pumps, thermostats, gaskets, hose clamps, and more. We also sell the Original BMW antifreeze to finish off the job.

    Any problems with the cooling system are likely electrical. Sensors become corroded and fail over time which will send the incorrect signal to the corresponding unit, including the engine computer. Diagnosis of electrical type problems is easy and repair with the OEM Bosch or OE BMW sensors is not too expensive for a car like this. Electrical connections, particularly solder joints, can also become brittle and fail. These are not helped by the intense vibrations of the S14.

    Top Turner Tip for a healthy S14!
    E30 M3s always seem to have cooling problems at the most inconvenient time. If the temp gauge starts rising in the summer months first check and make sure your auxiliary cooling fan is working if it's not it's most likely the switch or the wiring going to the switch. Also remember that the E30 instrument conductor plate can make the gauge read whacky try tapping the gauge if it seems like it's acting up. When it's time to do a water pump (which weeps through a hole on the bottom before it goes completely) take a good look at the radiator too its not expensive and you have to remove it to install the pump anyway.

    Use the options below to build your package.

    This cooling package fits the following BMWs:
    1988-1991 E30 BMW M3
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    Stock Replacement Radiator - E30 M3
    Stock Replacement Radiator - E30 M3
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Packaged by Turner - Corporate Logo
    T#:338019
    Part#: 17112225592
    Back Ordered
    Starting at $ 347.99 USD
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    Starting at $ 347.99 USD
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    This is a new stock E30 M3 Radiator. We offer both Genuine BMW or Nissens brand radaitors. The Genuine BMW radiator is the highest quality radiator available. The Nissens is a high quality aftermarket radatior.

    This item fits the following BMWs:
    1988-1991 E30 BMW M3
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    Water Pump - E30 M3
    Water Pump - E30 M3
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Packaged by Turner - Corporate Logo
    T#:337980
    Part#: 11511315211
    Back Ordered
    Starting at $ 299.99 USD
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    Starting at $ 299.99 USD
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    This is the stock replacement water pump for the E30 M3. This is the Genuine BMW pump and includes a new OE BMW gasket. It's always a good idea to have one as a spare. Even if it sits on your shelf for awhile it's going to be used at some point (and prices for Genuine E30 M3 parts aren't getting any lower). Aftermarket pumps have been in short supply and the quality hasn't been as good as the Original BMW pump so we have decided to stop offering aftermarket brands like Laso or Saleri. This is the Genuine BMW part, straight from BMW.

    This item fits the following BMWs:
    1987-1991 E30 BMW M3
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    Powerflex BMW E30 - E36 - E46 Offset Lower Radiator Mounts
    Powerflex BMW E30 - E36 - E46 Offset Lower Radiator Mounts
    affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
    Powerflex - Corporate Logo
    T#:34315165
    Part#: PFF5-4652H
    In Stock
    $ 42.99 USD
    Free Shipping on orders $49 and up
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    $ 42.99 USD
    Free Shipping on orders $49 and up
    Add to Wish List

    T

    The BMW E30 / E36 / E46 Offset Lower Radiator Mounts are designed to provide enhanced support and positioning for the radiator in BMW models, specifically the E30, E36, and E46. These mounts are a practical upgrade for vehicles that require extra clearance, especially when using aftermarket or larger radiators in performance builds.

    Key Features:

    1. Offset Design for Increased Clearance:

      • The offset configuration of these mounts offers additional room, making them ideal for accommodating larger radiators or custom cooling setups. This ensures proper fitment, especially in high-performance or modified vehicles.

    2. Stable and Secure Mounting:

      • These mounts provide firm support to keep the radiator securely in place, preventing unwanted movement or vibration, which is crucial for maintaining the cooling system’s efficiency during intense driving conditions.

    3. Durability and Heat Resistance:

      • Built from high-quality, heat-resistant materials, these mounts are designed to withstand the rigors of both daily driving and track use. They ensure long-lasting performance even under high temperatures and stress.

    4. Optimized Cooling Performance:

      • By ensuring the radiator is properly aligned and secured, these mounts help maximize the cooling system's performance. Proper positioning allows for efficient airflow through the radiator, which is vital for preventing overheating during demanding driving situations.

    5. Easy Installation:

      • These offset radiator mounts are designed as a direct-fit replacement, making installation simple and straightforward. They are compatible with the BMW E30, E36, and E46, allowing for an easy upgrade to support larger or performance-focused radiators.

    6. Perfect for Modified and Performance Builds:

      • Whether you're upgrading to a high-capacity radiator or modifying your vehicle for improved performance, these mounts offer the extra flexibility and stability needed for customized setups.

    Benefits of Upgrading or Replacing:

    • Extra Clearance for Larger Radiators: The offset design allows for better fitment, especially when upgrading to a larger or aftermarket radiator.
    • Prevents Vibration and Damage: These mounts reduce the risk of damage caused by vibration or radiator movement, ensuring longer-lasting performance.
    • Enhanced Cooling Efficiency: Properly securing the radiator ensures that it can work at peak efficiency, leading to better cooling performance during high-demand driving.

    In summary, the BMW E30 / E36 / E46 Offset Lower Radiator Mounts are an excellent choice for enthusiasts looking to upgrade their cooling system or accommodate a larger radiator. Their durable construction, ease of installation, and offset design make them a valuable addition for performance builds or maintaining cooling system reliability in modified BMWs.

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