BMW Coolant Expansion Tanks

N54 Billet 90 Degree Coolant Tank Fitting

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T#:12184492

Part#: VTT-COOLANT-90-1

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$ 37.99 USD

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Enhance the flexibility of your BMW's coolant system with the Vargas Turbo Technologies 90-Degree Coolant Tank Fitting. Ideal for applications such as single turbo setups or forward-facing intake manifolds, this fitting provides extra clearance and versatile hose routing options.

Key Benefits:

Allows hose to run straight down, increasing clearance
Made of durable 6061-T6 aluminum for long-lasting performance
Anodized black finish for enhanced durability and corrosion resistance
Includes fitting and clamp for easy installation

Upgrade your BMW's coolant system with the Vargas Turbo Technologies 90-Degree Coolant Tank Fitting for improved performance and versatility.

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URO Coolant Expansion Tank - E30 325e 325i 88-91

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T#:2453609

Part#: 17111712641

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$ 46.99 USD

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This coolant reservoir is for the E30 325i 1988-1991. We have found that the expansion tanks should be replaced based on age as well as condition. This item fits the following BMWs: 1988-1991 E30 BMW 325e 325es 325i 325ic 325is 325ix

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VTT Billet Coolant Reservoir Cap - Anodized Blue - Most BMWs 2006+ (E...

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T#:7530036

Part#: COOLANTCAPBLUE

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$ 79.99 USD

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$ 79.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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VTT Billet Coolant Reservoir Cap - Anodized Red - Most BMWs 2006+ (E/...

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T#:7530034

Part#: COOLANTCAPRED

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$ 79.99 USD

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$ 79.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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Coolant Expansion Tank

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T#:373102

Part#: 17111723520

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$ 30.99 USD

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$ 30.99 USD

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Does not include cap or coolant level sensor

URO Expansion Tank Mounting Plate - E83

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T#:593040

Part#: 17113400017

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$ 68.99 USD

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Secures the expansion tank to the radiator

URO Coolant Expansion Tank - BMW E46 M3

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T#:48608189

Part#: 17112283344

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$ 155.99 USD

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$ 155.99 USD

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This radiator coolant reservoir/expansion tank for E46 M3 is a common failure item as the plastic weakens and cracks, causing coolant leaks. If your E46 M3 has over 80k miles and still has the original expansion tank, we highly recommend replacing it during your next major service.

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VTT Billet Coolant Reservoir Cap - Anodized Clear - Most BMWs 2006+ (...

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T#:7530035

Part#: COOLANTCAPRAW

Ships in 3 Business Days

$ 78.99 USD

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$ 78.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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Coolant Expansion Tank - E53 E46 E83 M52 M54

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T#:373103

Part#: 17137787039

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$ 45.99 USD

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$ 45.99 USD

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We have found that the expansion tanks should be replaced based on age as well as condition. Expansion tanks seem to have a lifespan of less than six years before they show signs of fatigue and wear. Pre-emptively replacing the expansion tank as part of an overall maintenance plan can prevent you from getting stranded from a sudden failure later on.

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Coolant Expansion Tank

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T#:362009

Part#: 17111741167

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$ 49.99 USD

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$ 49.99 USD

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Does not include level sensor and cap

Coolant Expansion Tank

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T#:384250

Part#: 17137640514

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$ 60.74 USD

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$ 60.74 USD

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it.

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URO Coolant Expansion Tank - F30 328i xDrive 320i xDrive 320i 328i ...

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T#:639293

Part#: 17137642158

In Stock

$ 86.99

This product was last offered at the strikethrough price on
03-09-2026

$ 65.99 USD

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$ 65.99 USD

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URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts. As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

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Coolant Expansion Tank

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T#:377303

Part#: 17107514964

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$ 52.30 USD

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$ 52.30 USD

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break.

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Coolant Expansion Tank

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T#:363421

Part#: 17117573751

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$ 64.99 USD

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$ 64.99 USD

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Does not include cap or coolant level sensor

Coolant Expansion Tank

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T#:587608

Part#: 17137823626

In Stock

$ 47.99

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

$ 41.99 USD

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$ 47.99

This product was last offered at the strikethrough price on
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$ 41.99 USD

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Coolant Expansion Tank

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T#:4126643

Part#: 17137601948

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$ 69.99

This product was last offered at the strikethrough price on
06-09-2026

$ 59.99 USD

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$ 69.99

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URO Coolant Expansion Reservoir. Quality replacement Coolant tank for leaking or old Coolant parts.

Expansion Tank

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T#:36947225

Part#: 17135A6A031

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$ 101.99

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

$ 87.99 USD

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The coolant expansion tank in your vehicle provides a reservoir for excess fluid as it expands and contracts due to temperature changes. However, frequent exposure to these extreme fluctuations can cause the tank to crack or break over time. To maintain proper coolant levels within the cooling system, any damage to the tank—such as cracks, broken fittings, or damaged mounting points—requires immediate replacement.

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URO Coolant Expansion Tank - E70

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T#:592016

Part#: 17137552546

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$ 70.99 USD

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$ 70.99 USD

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Replace your cracked or faded tank

Expansion Tank Hose

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T#:373093

Part#: 11531711002

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$ 41.99 USD

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Connects between the thermostat and the lower expansion tank then to the heater core

Expansion Tank

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T#:587219

Part#: 17137647283

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$ 60.99 USD

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Expansion Tank

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T#:362010

Part#: 17137501959

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$ 53.99 USD

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$ 53.99 USD

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Includes vent screw and leveling switch

Expansion Tank

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T#:377312

Part#: 17137543003

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$ 56.99 USD

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it.

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Expansion Tank Retaining Plate

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T#:362912

Part#: 17111436251

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Mounts to the side of the radiator for retaining the expansion tank

URO Parts Expansion Tank - 17137642160

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T#:29002182

Part#: 17137642160

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$ 80.81 USD

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Expansion tanks are susceptible to damage due to constant exposure to high ambient temperatures and chemical degradation. If your expansion tank is cracked, replacing it is crucial to prevent catastrophic engine damage from overheating.

Features:

Guaranteed fitment Precision-molded to OE dimensions for compatibility with original sensors and connections Quality materials resist engine heat and harsh cooling system environments Factory pressure-tested 24-Month Unlimited Mileage Warranty URO Parts offers more than 8,000 high-quality spare parts, many of which are specifically designed to replace factory BMW components. Their business was founded on the premise of producing parts that adhere to the highest standards of precision, materials, and workmanship. Each part is closely evaluated by a team of industry professionals to determine how to offer the best blend of durability, function, and price. If you're looking for quality replacement components at a reasonable price, look no further than URO Parts.

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Expansion Tank

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T#:373100

Part#: 17111436381

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$ 57.99 USD

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BMW E39 coolant expansion tank without cap.

URO Expansion Tank Mount - BMW E53 M54 3.0L

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T#:598530

Part#: 17111438819

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$ 51.99 USD

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Found on the left side of the radiator - ensures proper mounting of the radiator. Quality replacement from URO

URO Intercooler Expansion Tank - BMW N63 N74

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T#:593075

Part#: 17137647281

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break.

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URO Coolant Expansion Tank With Level Sensor - F10 528i

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T#:597578

Part#: 17138614293

In Stock at Vendor

$ 65.99

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

$ 63.99 USD

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$ 63.99 USD

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A quality replacement from URO. Includes level sensor

VTT Billet Coolant Reservoir Cap - Anodized Black - Most BMWs 2006+ (...

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T#:7530033

Part#: COOLANTCAPBLK

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$ 79.99 USD

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$ 79.99 USD

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VTT is proud to offer their billet replacement for the factory plastic Coolant Reservoir cap. This cap does away with the weak plastic cap while adding some pop, and color to your engine bay. This coolant cap retains ALL of the factory provisions by simply allowing you to snap the factory pressure-relief into the new Billet Cap. VTT also designed these caps to complement their N5X Billet Oil caps, N5XBillet Oil filter housing caps, and Billet Power Steering cap, so all 4 will have the same design. These caps are offered in 4 colors – Red, Black, Blue, and Clear anodized Replaces Genuine BMW Reservoir Cap # 17117639020 Note: Fitment includes 99% of all BMW with a coolant Reservoir tank from the E series forward, meaning then fit even the brand New G8X M3/4 with the S58, all B58, etc. If your BMW is an E90 or newer this cap most likely will fit

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Expansion Tank Mounting Plate

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T#:584756

Part#: 17111436250

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$ 49.99 USD

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Replace your broken mounting plate to keep your expansion tank secure and prevent leaks.

Coolant Hose

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T#:373098

Part#: 64218390710

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$ 21.99 USD

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$ 21.99 USD

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Connects to coolant recovery tank

Coolant Expansion Tank Cap

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T#:373591

Part#: 17117521071

In Stock

$ 18.99

This product was last offered at the strikethrough price on
03-09-2026

$ 14.49 USD

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$ 14.49 USD

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Keep that coolant expansion tank sealed

Coolant Expansion Tank

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T#:377314

Part#: 17137542986

In Stock

$ 55.99 USD

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$ 55.99 USD

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it.

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Coolant Level Sensor

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T#:379491

Part#: 61318360855

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$ 12.99 USD

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$ 12.99 USD

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Monitors the coolant level in the expansion tank

URO Coolant Expansion Tank w/ Level Sensor - E90 335d

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T#:1996203

Part#: 17138570079

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$ 73.99

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

$ 56.99 USD

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$ 73.99

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

$ 56.99 USD

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break. You want to keep all the coolant in your vehicle in the cooling system. If your tank has experienced damage such as cracking, nipples breaking off, or mounting point damage, you will need to replace it.

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Coolant Expansion Tank W/ Cap

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T#:598574

Part#: 17137529273

In Stock

$ 37.07

This product was last offered at the strikethrough price on
07-08-2026

$ 33.99 USD

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$ 37.07

This product was last offered at the strikethrough price on
07-08-2026

$ 33.99 USD

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URO Engine Coolant Expansion Tank Cap - BMW I01 - IB3

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T#:373592

Part#: 17132754264

Ships in 1 Business Day

$ 8.19 USD

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$ 8.19 USD

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Replace the expansion tank cap for your MINI / BMW to restore the seal of your cooling system

Expansion Tank Mounting Plate

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T#:593026

Part#: 17101439110

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$ 68.99 USD

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These plastic supports mount to the side of the radiator, and are used to hold the expansion tank in place.

URO Radiator Mounting Plate for Expansion Tank - Z4

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T#:639486

Part#: 17112248408

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URO Parts is one of the leading manufacturers of high quality direct replacement aftermarket components, covering a wide range of makes and models. All of their replacement parts are manufactured to ISO 9000 certification standards, so you can expect long lasting performance from URO Parts. As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform! URO Mounting Plate - This item fits the following BMW Chassis: E85,E86 Fits BMW Engines including: M54,N52

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Expansion Tank - Priced Each

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T#:639209

Part#: 17138610656

Ships in 1 Business Day

$ 117.99 USD

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$ 117.99 USD

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Replace your leaky coolant tank!

Expansion Tank Cap

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T#:373099

Part#: 17137516004

Ships in 1 Business Day

$ 15.99

This product was last offered at the strikethrough price on
04-10-2026

$ 10.99 USD

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$ 10.99 USD

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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.

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Coolant Expansion Tank

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T#:593078

Part#: 17138616418

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break.

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Coolant Level Switch - E31 E38 E39 Z8

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T#:20203

Part#: 61318360876

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$ 12.99

This product was last offered at the strikethrough price on
04-10-2026

$ 10.99 USD

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$ 10.99 USD

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This is the radiator coolant level sensor that mounts into the bottom of the cooling system expansion tank. With more than 4,000 European vehicle replacement parts, URO is no stranger to the market. Superior metal stock and extremely strict quality control are at the forefront of URO’s agenda and it shows as they become the OE supplier for more and more car companies every single day.

With more than 4,000 European vehicle replacement parts, URO is no stranger to the market. Superior metal stock and extremely strict quality control are at the forefront of URO’s agenda and it shows as they become the OE supplier for more and more car companies every single day.

This item fits the following BMWs:
1999-2000 E39 BMW 528i 540i
2001-2003 E39 BMW 525i 530i 540i
1995-2001 E38 BMW 740i 740il 750il
1990-1998 E31 BMW 840i 840ci
2000-2003 E52 BMW Z8 Roadster

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Coolant Expansion Tank

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T#:25507167

Part#: 17138742660

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$ 136.99 USD

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The coolant expansion tank is essential for your vehicle, acting as a reservoir for extra fluid during temperature shifts. However, frequent exposure to extreme conditions makes it susceptible to cracks or breaks. Maintaining all coolant within the system is vital for optimal engine function. If you detect any damage, such as cracks, broken nipples, or compromised mounting points, swift replacement of the tank is necessary to uphold your vehicle's cooling system integrity.

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URO Coolant Expansion Tank - BMW E30 E36 Z3 M42 M44, E34 325 ...

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T#:362008

Part#: 17111712835

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$ 18.99 USD

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$ 18.99 USD

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The coolant expansion tank in your vehicle gives additional fluid a place to go after expansion and contraction from temperature change. Because it is subjected to such drastic changes on a regular basis, it can often crack or break

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Expansion Tank Mounting Clamp

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T#:591954

Part#: 17111707777

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$ 6.99 USD

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Locks the expansion tank into the mounting plate via the large hole in the bottom of the tank

Coolant Expansion Tank

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T#:55749607

Part#: 17132284600

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$ 168.99 USD

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$ 168.99 USD

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This URO Coolant Expansion Tank is a budget-conscious alternative that's designed to handle the rigorous fluid expansion and pressure demands of your M car.

Coolant Level Sensor - 109mm Long

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T#:380458

Part#: 61311375715

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$ 15.99 USD

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Replace your coolant level sensor and ensure that your levels are accurately monitored

Coolant Expansion Tank

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T#:36947227

Part#: 17138093924

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$ 116.99 USD

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$ 116.99 USD

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The coolant expansion tank in your vehicle provides a reservoir for excess fluid as it expands and contracts due to temperature changes. However, frequent exposure to these extreme fluctuations can cause the tank to crack or break over time. To maintain proper coolant levels within the cooling system, any damage to the tank—such as cracks, broken fittings, or damaged mounting points—requires immediate replacement.

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