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URO BMW Coolant Expansion Tanks

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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URO Coolant Expansion Tank - E30 325e 325i 88-91
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T#:2453609
Part#: 17111712641
In Stock
$ 46.99 USD
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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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Coolant Expansion Tank
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T#:373102
Part#: 17111723520
Ships in 1 Business Day
$ 30.99 USD
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Does not include cap or coolant level sensor
URO Coolant Expansion Tank - BMW E46 M3
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T#:48608189
Part#: 17112283344
In Stock
New Item
$ 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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URO Expansion Tank Mounting Plate - E83
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T#:593040
Part#: 17113400017
In Stock
$ 68.99 USD
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Secures the expansion tank to the radiator

Coolant Expansion Tank - E53 E46 E83 M52 M54
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T#:373103
Part#: 17137787039
Ships in 1 Business Day
$ 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#:384250
Part#: 17137640514
In Stock
$ 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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Coolant Expansion Tank
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T#:362009
Part#: 17111741167
In Stock
$ 49.99 USD
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Does not include level sensor and cap
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
Free Shipping
$ 65.99 USD
Free Shipping
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
Ships in 1 Business Day
$ 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
Ships in 1 Business Day
$ 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#:4126643
Part#: 17137601948
In Stock
$ 69.99

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

$ 59.99 USD
Limited Qty Sale
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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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URO Coolant Expansion Reservoir. Quality replacement Coolant tank for leaking or old Coolant parts.
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
Limited Qty Sale
Free Shipping on orders $49 and up
$ 47.99

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

$ 41.99 USD
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Expansion Tank
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T#:36947225
Part#: 17135A6A031
Ships in 1 Business Day
$ 101.99

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

$ 87.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 101.99

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

$ 87.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
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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Expansion Tank
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T#:377312
Part#: 17137543003
Ships in 1 Business Day
$ 56.99 USD
Free Shipping on orders $49 and up
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
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T#:373100
Part#: 17111436381
Ships in 1 Business Day
$ 57.99 USD
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BMW E39 coolant expansion tank without cap.

URO Coolant Expansion Tank - E70
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T#:592016
Part#: 17137552546
Ships in 1 Business Day
$ 70.99 USD
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Replace your cracked or faded tank

Expansion Tank
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T#:587219
Part#: 17137647283
Ships in 1 Business Day
$ 60.99 USD
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URO Parts Expansion Tank - 17137642160
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T#:29002182
Part#: 17137642160
Back Ordered
$ 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 Retaining Plate
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T#:362912
Part#: 17111436251
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$ 53.99 USD
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$ 53.99 USD
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Mounts to the side of the radiator for retaining the expansion tank
Expansion Tank Hose
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T#:373093
Part#: 11531711002
Ships in 1 Business Day
$ 41.99 USD
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Connects between the thermostat and the lower expansion tank then to the heater core

URO Intercooler Expansion Tank - BMW N63 N74
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T#:593075
Part#: 17137647281
Ships in 1 Business Day
$ 59.99 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
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T#:362010
Part#: 17137501959
Ships in 1 Business Day
$ 53.99 USD
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Includes vent screw and leveling switch
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
Expansion Tank Mounting Plate
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T#:584756
Part#: 17111436250
Back Ordered
$ 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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Connects to coolant recovery tank
Coolant Expansion Tank
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T#:377314
Part#: 17137542986
In Stock
$ 55.99 USD
$ 55.99 USD
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 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
Free Shipping on orders $49 and up
$ 14.49 USD
Free Shipping on orders $49 and up
Keep that coolant expansion tank sealed

Coolant Level Sensor
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T#:379491
Part#: 61318360855
Ships in 1 Business Day
$ 12.99 USD
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$ 12.99 USD
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Monitors the coolant level in the expansion tank

Coolant Expansion Tank W/ Cap
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T#:598574
Part#: 17137529273
In Stock
$ 37.07 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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Replace the expansion tank cap for your MINI / BMW to restore the seal of your cooling system

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
Free Shipping on orders $49 and up
$ 10.99 USD
Free Shipping on orders $49 and up
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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URO Radiator Mounting Plate for Expansion Tank - Z4
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T#:639486
Part#: 17112248408
Back Ordered
$ 69.99 USD
Free Shipping on orders $49 and up
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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Coolant Expansion Tank
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T#:25507167
Part#: 17138742660
Ships in 1 Business Day
$ 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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Coolant Level Switch - E31 E38 E39 Z8
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T#:20203
Part#: 61318360876
Ships in 1 Business Day
$ 12.99

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

$ 10.99 USD
Free Shipping on orders $49 and up
$ 10.99 USD
Free Shipping on orders $49 and up
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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Expansion Tank Mounting Clamp
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T#:591954
Part#: 17111707777
Ships in 1 Business Day
$ 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#:36947227
Part#: 17138093924
Ships in 1 Business Day
$ 116.99 USD
Free Shipping on orders $49 and up
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 - BMW E30 E36 Z3 M42 M44, E34 325 ...
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T#:362008
Part#: 17111712835
Ships in 1 Business Day
$ 18.99 USD
Free Shipping on orders $49 and up
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 Sensor - 109mm Long
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T#:380458
Part#: 61311375715
Ships in 1 Business Day
$ 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#:593078
Part#: 17138616418
Back Ordered
$ 63.99 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 - Priced Each
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T#:639209
Part#: 17138610656
Ships in 1 Business Day
$ 117.99 USD
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Replace your leaky coolant tank!

Expansion Tank Mounting Plate
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T#:593026
Part#: 17101439110
Ships in 1 Business Day
$ 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 Parts Expansion Tank - 17138677649
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T#:29002185
Part#: 17138677649
Back Ordered
$ 87.99 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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URO Expansion Tank Cap - BMW E30
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T#:592118
Part#: 17111468077
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$ 6.99 USD
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URO Expansion Tank Cap - BMW E30

The URO Expansion Tank Cap - BMW E30 is a crucial component for maintaining optimal cooling system performance by ensuring proper pressure regulation. Over time, older radiator caps lose their ability to hold pressure, leading to a lower boiling point and potential overheating issues. This high-quality replacement cap is designed to restore factory pressure levels, preventing coolant loss and maintaining engine efficiency. Crafted from durable materials, it resists wear and temperature fluctuations, ensuring long-lasting reliability.

  • Direct replacement for BMW E30 models
  • Maintains correct cooling system pressure to prevent overheating
  • Helps sustain optimal engine temperature and performance
  • High-quality construction for durability and reliability
  • Prevents coolant evaporation and system inefficiencies
  • Easy installation with OE-style fitment
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Expansion Tank Cap
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T#:362007
Part#: 17114379047
Back Ordered
$ 7.99 USD
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$ 7.99 USD
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1.2 Bar pressure