• Home
  • Search
  • coolant expansion tank

Showing 61 results for "coolant expansion tank"

Sort By:
Rein Coolant Expansion Tank - 17137640514 - E9x, E8x, E84
Rein Coolant Expansion Tank - 17137640514 - E9x, E8x, E84
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:402142
Part#: 17137640514
In Stock
$ 70.99

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

$ 70.35 USD
Free Shipping
Add to Wish List
$ 70.35 USD
Free Shipping
Add to Wish List
Includes level sensor
Rein N55 Coolant Expansion Tank - 17137640515 - E9x, E8x
Rein N55 Coolant Expansion Tank - 17137640515 - E9x, E8x
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592020
Part#: 17137640515
In Stock
$ 97.99 USD
Free Shipping
Add to Wish List
$ 97.99 USD
Free Shipping
Add to Wish List
Includes level sensor
Rein Coolant Expansion Tank - 17117573781 - E46, E83 X3, E53 X5
Rein Coolant Expansion Tank - 17117573781 - E46, E83 X3, E53 X5 ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:402141
Part#: 17117573781
In Stock
$ 76.39 USD
Free Shipping
Add to Wish List
$ 76.39 USD
Free Shipping
Add to Wish List
Includes cap and level sensor
Rein Coolant Expansion Tank - 17137823626 - I12 i8
Rein Coolant Expansion Tank - 17137823626 - I12 i8
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:388723
Part#: 17137823626
In Stock
$ 78.99

This product was last offered at the strikethrough price on
10-15-2026

$ 47.59 USD
Free Shipping
Add to Wish List
$ 47.59 USD
Free Shipping
Add to Wish List
Mounts towards the front of the engine bay
Rein N47 N55 Coolant Expansion Tank - 17137642160 - F3x, F22, F23, F87
Rein N47 N55 Coolant Expansion Tank - 17137642160 - F3x, F22, F23, F8...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45791749
Part#: 17137642160
In Stock
$ 79.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 79.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Expansion tanks take constant abuse from high heat and harsh coolant, making them prone to cracking or failure over time. A damaged tank can quickly lead to overheating and serious engine damage, so replacement is critical at the first sign of trouble. Features: Direct fitment for hassle-free installation Precision-molded to OE specs for perfect sensor and hose connections Durable construction stands up to extreme heat and coolant chemicals Factory pressure-tested for reliable performance
Show More Show Less
Rein Coolant Expansion Tank - 17111741167 - E39 540i, E38 740i 740iL 750iL, E31
Rein Coolant Expansion Tank - 17111741167 - E39 540i, E38 740i 740iL ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591959
Part#: 17111741167
Ships in 1 Business Day
$ 69.99

This product was last offered at the strikethrough price on
10-22-2026

$ 54.59 USD
Free Shipping
Add to Wish List
$ 54.59 USD
Free Shipping
Add to Wish List
Plastic has a limited lifespan - replace every 80,000 miles
Rein M52 M54 Coolant Expansion Tank - 17111436381 - E39 525i 528i 530i
Rein M52 M54 Coolant Expansion Tank - 17111436381 - E39 525i 528i 530...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:388645
Part#: 17111436381
In Stock at Vendor
$ 87.99 USD
Free Shipping
Add to Wish List
$ 87.99 USD
Free Shipping
Add to Wish List

BMW E39 Coolant Expansion Tank is an essential component designed to maintain the proper coolant level in your vehicle's cooling system. Manufactured with high-quality materials, this expansion tank ensures reliable performance and durability, preventing engine overheating by accommodating the expansion of coolant as it heats up. The kit includes a level sensor and cap, providing everything needed for a seamless installation. This expansion tank is specifically engineered to meet the exact specifications of your BMW E39, offering a perfect fit and optimal functionality.

  • Complete Kit: Includes level sensor and cap for easy installation.
  • High-Quality Construction: Built with durable materials for long-lasting performance.
  • Prevents Overheating: Helps manage coolant expansion, ensuring engine protection.
  • Exact Fit: Designed to meet the precise specifications of your BMW E39.
  • Enhanced Reliability: Ensures proper coolant level maintenance for optimal cooling system function.
Show More Show Less
Rein Engine Coolant Expansion Tank - 17138677649 - F3x, F22, F23
Rein Engine Coolant Expansion Tank - 17138677649 - F3x, F22, F23 ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:17704748
Part#: 17138677649
In Stock
$ 118.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 118.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Rein B48 B58 Coolant Expansion Tank Hose - 17125A09423 - G30 5 Series
Rein B48 B58 Coolant Expansion Tank Hose - 17125A09423 - G30 5 Series...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:55821725
Part#: 17125A09423
In Stock
New Item
$ 18.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 18.99 USD
Free Shipping on orders $49 and up
Add to Wish List
While the modern B48 and B58 powerplants are incredibly robust, BMW’s choice of brittle plastics for their cooling loops remains a major weak link. This upper radiator vent hose runs constantly hot as it returns pressurized coolant back to the expansion tank. After years of being baked by engine bay heat, the thin plastic neck and internal quick-disconnect seals degrade. A hardened factory plastic line can snap at any moment, spraying coolant everywhere.
Show More Show Less
Rein Coolant Expansion Tank - 17135A6A030 - G01, F97, G02, F98
Rein Coolant Expansion Tank - 17135A6A030 - G01, F97, G02, F98 ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:39059266
Part#: 17135A6A030
In Stock
$ 86.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 86.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Coolant expansion tanks can crack over time, especially during services where they need to be removed. Replace your tank with a brand new tank to ensure your cooling system remains leak-free.
Rein Coolant Expansion Tank - 17107514964 - E53 X5
Rein Coolant Expansion Tank - 17107514964 - E53 X5
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591949
Part#: 17107514964
Back Ordered
$ 80.99

This product was last offered at the strikethrough price on
10-22-2026

$ 58.95 USD
Free Shipping
Add to Wish List
$ 58.95 USD
Free Shipping
Add to Wish List
Includes bleeder screw
Rein Coolant Expansion Tank - 17137542986 - E60, E61, E63 E64 6 Series
Rein Coolant Expansion Tank - 17137542986 - E60, E61, E63 E64 6 Serie...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:402160
Part#: 17137542986
Ships in 1 Business Day
$ 82.99

This product was last offered at the strikethrough price on
10-22-2026

$ 66.09 USD
Free Shipping
Add to Wish List
$ 66.09 USD
Free Shipping
Add to Wish List
Includes fluid level sensor
Rein Coolant Expansion Tank - 17138621092 - E70, F15, E71, F16, F86
Rein Coolant Expansion Tank - 17138621092 - E70, F15, E71, F16, F86 ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592030
Part#: 17138621092
In Stock at Vendor
$ 100.99

This product was last offered at the strikethrough price on
10-22-2026

$ 68.39 USD
Free Shipping
Add to Wish List
$ 68.39 USD
Free Shipping
Add to Wish List
Replace your cracked or faded tank
Rein M57 Coolant Expansion Tank - 17138570079 - E90 335d
Rein M57 Coolant Expansion Tank - 17138570079 - E90 335d
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:555023
Part#: 17138570079
Ships in 3 Business Days
$ 124.99

This product was last offered at the strikethrough price on
10-22-2026

$ 82.99 USD
Free Shipping
Add to Wish List
$ 82.99 USD
Free Shipping
Add to Wish List

Replace your damaged expansion tank to prevent coolant loss or potential overheating issues.


This item fits the following BMW Chassis:
E90

Fits BMW Engines including:
M57

Show More Show Less
Rein Coolant Expansion Tank Hose - F48 X1 F39 X2
Rein Coolant Expansion Tank Hose - F48 X1 F39 X2
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58489960
Part#: 17127646898
Ships in 3 Business Days
New Item
$ 26.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 26.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Protect your engine against thermal degradation and maintain precise cooling system pressure with a Rein Expansion Tank Vent Hose. Engineered as a direct fit replacement for failure prone original equipment vent lines, this coolant hose safely bleeds air and expanded fluid back to the reservoir. Manufactured with durable heat resistant materials and factory style quick connect fittings, it ensures a tight seal against pressure drops and prevents fluid loss across transverse B46, B48, and B38 engine bays.
Show More Show Less
Engine Coolant Expansion Tank Cap
Engine Coolant Expansion Tank Cap
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:59038367
Part#: 17135A1BD89
Ships in 3 Business Days
New Item
$ 9.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 9.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Rein Coolant Expansion Tank - With Cap - 17135A6A030C - G01, F97, G02, F98
Rein Coolant Expansion Tank - With Cap - 17135A6A030C - G01, F97, G02...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:53891623
Part#: 17135A6A030C
Ships in 3 Business Days
New Item
$ 99.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 99.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Replace your old brittle expansion tank
Coolant Expansion Tank
Coolant Expansion Tank
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:57086700
Part#: 17137642158
Ships in 3 Business Days
New Item
$ 55.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 55.99 USD
Free Shipping on orders $49 and up
Add to Wish List
The factory expansion tank is one of the most common failure points in modern BMW cooling systems, often failing along seam welds or developing micro-cracks around fluid quick-connect fittings. Replacing a degraded reservoir with this direct-fit Rein expansion tank restores pressure containment, ensures accurate coolant expansion volume, and prevents fluid loss before it turns into severe engine damage.
Show More Show Less
Rein Coolant Expansion Tank With Cap And Level Sensor - BMW F22/23 F3X N20 2.0L
Rein Coolant Expansion Tank With Cap And Level Sensor - BMW F22/23 F3...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58782356
Part#: 17137642158K
Ships in 3 Business Days
New Item
$ 76.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 76.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Eliminate coolant leaks with this brand new reservoir and cap kit from Rein - integrate coolant level sensor included with the coolant reservoir
Rein B48 B58 Coolant Expansion Tank - 17139485733 - G30 5 Series, G32 6 Series, G11 7 Series, G14 G15 G16 8 Series
Rein B48 B58 Coolant Expansion Tank - 17139485733 - G30 5 Series, G32...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45791753
Part#: 17139485733
Back Ordered
$ 54.99

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

$ 52.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 52.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Expansion tanks take constant abuse from high heat and harsh coolant, making them prone to cracking or failure over time. A damaged tank can quickly lead to overheating and serious engine damage, so replacement is critical at the first sign of trouble. Features: Direct fitment for hassle-free installation Precision-molded to OE specs for perfect sensor and hose connections Durable construction stands up to extreme heat and coolant chemicals Factory pressure-tested for reliable performance
Show More Show Less
Rein B48 Coolant Expansion Tank Overflow Hose - 17125A02485 - G30 530e, G11 740e xDrive
Rein B48 Coolant Expansion Tank Overflow Hose - 17125A02485 - G30 530...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45757471
Part#: 17125A02485
Ships in 3 Business Days
$ 41.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 41.99 USD
Free Shipping on orders $49 and up
Add to Wish List
This hose connects the expansion tank to the radiator. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.
Rein Coolant Expansion Tank - 17137647290 - E70, E71 X6 50iX X6 ActiveHybrid X6 M
Rein Coolant Expansion Tank - 17137647290 - E70, E71 X6 50iX X6 Activ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592023
Part#: 17137647290
Ships in 3 Business Days
$ 85.99 USD
Free Shipping
Add to Wish List
$ 85.99 USD
Free Shipping
Add to Wish List
Plastic expansion tanks have a limited lifespan - replace every 80,000 miles
Coolant Expansion Tank W/ Cap
Coolant Expansion Tank W/ Cap
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592210
Part#: 17137529273
In Stock at Vendor
$ 44.99

This product was last offered at the strikethrough price on
10-22-2026

$ 42.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 42.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Rein Coolant Expansion Tank - 171386106612 - G01, F97, G02, F98, G05, G06, G07
Rein Coolant Expansion Tank - 171386106612 - G01, F97, G02, F98, G05,...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:55965843
Part#: 171386106612
Ships in 3 Business Days
New Item
$ 49.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 49.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Keep your ultimate driving machine cool under pressure with this replacement auxiliary expansion tank from Rein. On modern turbocharged BMWs, the secondary cooling system plays a critical role in managing intake charge air temperatures, making a solid reservoir vital for both spirited street driving and track day reliability.
Show More Show Less
Rein B46 Coolant Expansion Tank Hose - 17127535536 - G01 X3 sDrive30i X3 xDrive30i, G02 X4 xDrive30i
Rein B46 Coolant Expansion Tank Hose - 17127535536 - G01 X3 sDrive30i...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45757473
Part#: 17127535536
Back Ordered
$ 76.00

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

$ 73.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 73.99 USD
Free Shipping on orders $49 and up
Add to Wish List
This hose connects the heat management module to the expansion tank's lower port. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.
Show More Show Less
Rein N62 N73 Coolant Expansion Tank - 17137647713 - E65 7 Series, E66 745Li 750Li 760Li
Rein N62 N73 Coolant Expansion Tank - 17137647713 - E65 7 Series, E66...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:593077
Part#: 17137647713
Ships in 3 Business Days
$ 99.99 USD
Free Shipping
Add to Wish List
$ 99.99 USD
Free Shipping
Add to Wish List
Rein Coolant Expansion Tank for the E65 and E66 on N62 and N73 engines, an OE-equivalent replacement for cracked or faded tanks. Look for cracking, broken nipples, or damaged mounting points, which let coolant escape from the cooling system. Replacing the tank keeps the coolant where it belongs as fluid expands and contracts with temperature changes.
Show More Show Less
Rein B46 B58 Coolant Expansion Tank Overflow Hose - 17125A022D6 - G01 X3 M40i X3 sDrive30i X3 xDrive30i, G02 X4 M40i X4 xDrive30i
Rein B46 B58 Coolant Expansion Tank Overflow Hose - 17125A022D6 - G01...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45757470
Part#: 17125A022D6
Ships on Nov 19, 2026
$ 35.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 35.99 USD
Free Shipping on orders $49 and up
Add to Wish List
This hose connects the expansion tank to the radiator. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.
Rein Coolant Expansion Tank - 17138616418 - F25, F26 X4 xDrive28i X4 xDrive35i
Rein Coolant Expansion Tank - 17138616418 - F25, F26 X4 xDrive28i X4 ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:592029
Part#: 17138616418
In Stock at Vendor
$ 85.99 USD
Free Shipping
Add to Wish List
$ 85.99 USD
Free Shipping
Add to Wish List
Replaced your cracked unit with a new coolant expansion tank
Rein Coolant Expansion Tank Overflow Hose - 17128651298 - F25, F26 X4 M40iX X4 xDrive28i X4 xDrive35i
Rein Coolant Expansion Tank Overflow Hose - 17128651298 - F25, F26 X4...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45757476
Part#: 17128651298
Back Ordered
$ 31.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 31.99 USD
Free Shipping on orders $49 and up
Add to Wish List
This hose connects the expansion tank to the upper radiator hose. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.
Rein N55 Coolant Expansion Tank With Cap - E8x/E9x N55 - EPK0131 - E9x, E8x
Rein N55 Coolant Expansion Tank With Cap - E8x/E9x N55 - EPK0131 - E9...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46616007
Part#: EPK0131
Ships in 3 Business Days
$ 104.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 104.99 USD
Free Shipping on orders $49 and up
Add to Wish List
The coolant expansion tank provides a place for excess coolant to flow as temperatures rise and fall. Because it constantly endures extreme temperature changes, it’s prone to cracking or breaking over time. Keeping coolant contained within the system is essential, so if your tank shows signs of damage—such as cracks, broken nipples, or compromised mounting points—it’s time for a replacement.
Show More Show Less
Rein B46 Coolant Expansion Tank Hose - 17127535528 - G01 X3 sDrive30i X3 xDrive30i, G02 X4 xDrive30i
Rein B46 Coolant Expansion Tank Hose - 17127535528 - G01 X3 sDrive30i...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:45757474
Part#: 17127535528
Back Ordered
$ 53.99

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

$ 51.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 51.99 USD
Free Shipping on orders $49 and up
Add to Wish List
This hose connects the cylinder head to the expansion tank's upper port. If your coolant expansion tank hose is cracked or leaking, replace it early to prevent further coolant loss and eventual overheating.
Show More Show Less
Rein Coolant Expansion Tank With Cap - EPK0012 - E30 318i 318is, E36 318i 318is 318ti, E34 525i
Rein Coolant Expansion Tank With Cap - EPK0012 - E30 318i 318is, E36 ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46616014
Part#: EPK0012
Back Ordered
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
The coolant expansion tank provides a place for excess fluid as coolant expands and contracts with temperature changes. Constant exposure to these extremes can cause the tank to crack, break, or suffer damage to its nipples or mounting points. To keep your cooling system sealed and functioning properly, any damaged tank should be replaced.
Show More Show Less
Rein Coolant Expansion Tank With Cap - EPK0013 - E39 540i, E38 740i 740iL 750iL, E31 840Ci 850Ci 850CSi
Rein Coolant Expansion Tank With Cap - EPK0013 - E39 540i, E38 740i 7...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:46616009
Part#: EPK0013
In Stock at Vendor
$ 71.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 71.99 USD
Free Shipping on orders $49 and up
Add to Wish List
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. This replacement will fit perfectly and provide the same heating and cooling characteristics as an original unit. When replacing, be sure to have some extra coolant. Check ECS Tuning's website for a wide variety of coolants specifically designed for your car. Most German vehicles require specialized coolant. Be sure to pick up the proper coolant when refilling to avoid damage or premature corrosion.
Show More Show Less
Rein M54 X3 Coolant Hose - Lower Expansion Tank - 11533400205 - E83 X3
Rein M54 X3 Coolant Hose - Lower Expansion Tank - 11533400205 - E83 X...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:363441
Part#: 11533400205
Ships in 1 Business Day
$ 28.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 28.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
Rein B48 Engine Coolant Hose - Upper Radiator To Expansion Tank - 17129844478 - G30 5 Series, G11 740e xDrive
Rein B48 Engine Coolant Hose - Upper Radiator To Expansion Tank - 171...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52903294
Part#: 17129844478
Back Ordered
New Item
$ 49.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 49.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Upgrade your cooling system with the Rein Automotive replacement coolant hose, engineered to meet or exceed the rigorous standards of your BMW.
Rein Expansion Tank Coolant Hose - G20 G22 G23 G26 G42 (B46 B48)
Rein Expansion Tank Coolant Hose - G20 G22 G23 G26 G42 (B46 B48) ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:58307536
Part#: 17128654824
Ships in 3 Business Days
New Item
$ 26.99 USD
Add to Wish List
$ 26.99 USD
Add to Wish List
Prevent catastrophic cooling system failure and maintain optimal system pressure with a Rein Expansion Tank Vent Line. Engineered as a direct fit replacement for brittle factory expansion tank lines, this vent hose routes pressurized coolant vapor from the cylinder head back to the expansion reservoir. Manufactured with durable heat resistant materials and factory style quick disconnect fittings, it ensures a tight seal against pressure drops and prevents fluid loss.
Show More Show Less
Rein N62 Coolant Hose - Expansion Tank - 17127508015 - E65 745i 750i B7 Alpina, E66 745Li 750Li
Rein N62 Coolant Hose - Expansion Tank - 17127508015 - E65 745i 750i ...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375750
Part#: 17127508015
Back Ordered
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Rein Coolant Hose for the N62 engine on the E65 and E66 connects the expansion tank bottom fitting to the supply hose as an OE-equivalent replacement. Made from reinforced rubber, it addresses the common failures of cooling hoses: splitting at the clamp, swelling, cracking and breaking. Replacing it before it leaks protects coolant flow.
Show More Show Less
Rein Expansion Tank Vent Hose - 17127618510 - E9x, E8x
Rein Expansion Tank Vent Hose - 17127618510 - E9x, E8x
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:402113
Part#: 17127618510
In Stock
$ 32.99

This product was last offered at the strikethrough price on
10-13-2026

$ 32.29 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 32.29 USD
Free Shipping on orders $49 and up
Add to Wish List
Acts as a vent hose between the upper radiator hose and the expansion tank. Runs the length of the top of the radiator.
Rein Expansion Tank Hose - 17121712736 - E21, E30, E36, E12, E28, E34, E24, E23, E32
Rein Expansion Tank Hose - 17121712736 - E21, E30, E36, E12, E28, E34...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:19431
Part#: 17121712736
In Stock
$ 13.99

This product was last offered at the strikethrough price on
10-25-2026

$ 12.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Add to Wish List
$ 13.99

This product was last offered at the strikethrough price on
10-25-2026

$ 12.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Add to Wish List


VENT HOSE 17121712736 Manufactured by CRP

Rein Expansion Tank Hose - 11531438633 - E39 525i 528i 530i
Rein Expansion Tank Hose - 11531438633 - E39 525i 528i 530i
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375748
Part#: 11531438633
In Stock
$ 18.99

This product was last offered at the strikethrough price on
10-22-2026

$ 18.59 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 18.59 USD
Free Shipping on orders $49 and up
Add to Wish List
Runs from the expansion tank to auxiliary water pump
Rein Expansion Tank Hose - 11531741404 - E39 540i, E38 740i 740iL, E31 840Ci
Rein Expansion Tank Hose - 11531741404 - E39 540i, E38 740i 740iL, E3...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375756
Part#: 11531741404
In Stock
$ 8.45

This product was last offered at the strikethrough price on
10-15-2026

$ 7.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Add to Wish List
$ 8.45

This product was last offered at the strikethrough price on
10-15-2026

$ 7.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
Add to Wish List
Connects the expansion tank to the radiator
Rein Expansion Tank Hose - 17111723521 - E30 325i, E36, E46 323i 328i
Rein Expansion Tank Hose - 17111723521 - E30 325i, E36, E46 323i 328i...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375751
Part#: 17111723521
Ships in 1 Business Day
$ 16.99

This product was last offered at the strikethrough price on
10-22-2026

$ 7.95 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 7.95 USD
Free Shipping on orders $49 and up
Add to Wish List
Connects the expansion tank to the radiator
Rein Expansion Tank Vent Pipe - 17127521775 - E60, E61, E63 E64 6 Series
Rein Expansion Tank Vent Pipe - 17127521775 - E60, E61, E63 E64 6 Ser...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:402415
Part#: 17127521775
In Stock at Vendor
$ 28.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 28.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Replace your cracked and leaking hose with this replacement from Rein
Rein Expansion Tank Hose - 11531438632 - E39 525i 528i 530i
Rein Expansion Tank Hose - 11531438632 - E39 525i 528i 530i
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:375747
Part#: 11531438632
Ships in 1 Business Day
$ 24.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 24.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Rein Expansion Tank Hose - 11537505950 - E53 X5
Rein Expansion Tank Hose - 11537505950 - E53 X5
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:363439
Part#: 11537505950
Ships in 1 Business Day
$ 27.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 27.99 USD
Free Shipping on orders $49 and up
Add to Wish List

Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

This item fits the following BMWs: 
2000-2003 E53 BMW X5 4.4i 4.6is

Show More Show Less
Rein Expansion Tank Hose - 17127592645 - F07, F10 5 Series, F12 F13 6 Series
Rein Expansion Tank Hose - 17127592645 - F07, F10 5 Series, F12 F13 6...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:554679
Part#: 17127592645
Ships in 3 Business Days
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List

Replace your cracked or leaking radiator hose to prevent further leaks and potentially catastrophic failure.

Fits the following BMW Chassis:
F07, F10, F12, F13,

Fits the following engines:
N63 4.4L

Show More Show Less
Water Hose - Water Pump To Expansion Tank
Water Hose - Water Pump To Expansion Tank
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:594311
Part#: 17127575453
Ships in 3 Business Days
$ 67.99

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

$ 38.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 38.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Replacement water hose from Rein
Rein N63 Engine Coolant Reservoir - EPT0274 - G30 5 Series, G11 7 Series, G14 G15 G16 8 Series
Rein N63 Engine Coolant Reservoir - EPT0274 - G30 5 Series, G11 7 Ser...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:52516268
Part#: EPT0274
Ships in 3 Business Days
New Item
$ 114.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 114.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Protect your BMW investment with the Rein EPT0274 Engine Coolant Reservoir, the professional’s choice for cooling system restoration.
Rein Expansion Tank Hose - 17127509965 - E53 X5
Rein Expansion Tank Hose - 17127509965 - E53 X5
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:379752
Part#: 17127509965
Ships in 3 Business Days
$ 34.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 34.99 USD
Free Shipping on orders $49 and up
Add to Wish List
This is one of the hoses exiting from the bottom of the expansion tank on your BMW. Over time, coolant hoses begin to get brittle and are susceptible to cracking and splitting. Replace your cracked or leaking coolant hose to prevent further leaks and potentially catastrophic failure.
Show More Show Less
Rein Expansion Tank Vent Hose - 17127519247 - E60 525i 530i 545i, E63 645Ci, E64 645Ci
Rein Expansion Tank Vent Hose - 17127519247 - E60 525i 530i 545i, E63...
2X Entries Into Our F80 M3 Sweepstakes
Rein - Corporate Logo
T#:591986
Part#: 17127519247
Ships in 3 Business Days
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 29.99 USD
Free Shipping on orders $49 and up
Add to Wish List
With quick connect coupling

Select Vehicle

BMW Mini
Clear Vehicle

Category

Brand

Price

$
$

Special Offers

Shipping