Direct replacement - this engine coolant reservoir matches the fit and function of the original part
Ideal solution - engineered for a seamless installation
Durable construction - manufactured from quality materials to withstand underhood heat and vibration
Trustworthy design - backed by 100 years of automotive aftermarket experience

Position: Front

Condition: New

Package Contents 1 Coolant Reservoir; 1 Cap; 1 Thermostat; 1 Clip

Color Black

Shipping Options:
Ground

This Part Fits:

Catalog: B

Vehicle	Engine
2003 BMW Z4	2.5L 6 Cyl
2003 BMW Z4	3.0L 6 Cyl

Behr Expansion Tank

(2 Reviews)

5 Stars

Behr W0133-1815606
Expansion Tank

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Part Number: W0133-1815606

Condition: New

Shipping Options:
Ground, Overnight, 2 Day

OEM

This Part Fits:

Catalog: A

Vehicle
2003 BMW Z4

Behr Expansion Tank

(Read reviews)

Part Number: 1196-08069455

Notes: Coolant Expansion Tank

Condition: New

Shipping Options:
Ground

This Part Fits:

Catalog: G

Vehicle
2003 BMW Z4

Brock Expansion Tank

(Read reviews)

Part Number: 1196-07970075

Notes: Engine Coolant Reservoir -- 03-16 BMW Various Models Coolant Recovery Tank Level Sensor 11-16 Mini Cooper Countryman 13-16 Mini Cooper Paceman

Condition: New

Shipping Options:
Free Ground Shipping

This Part Fits:

Catalog: K

Vehicle	Sub Model	Body	Engine
2003 BMW Z4	3.0i RWD	Convertible 2dr	3.0L 6 Cyl Naturally Aspirated DOHC GAS

Genuine Expansion Tank

(1 Reviews)

5 Stars

Genuine W0133-1815606
Expansion Tank

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Part Number: W0133-1815606

Features:

OEM-Quality and Direct Fit for easy Installation.
OE factory connections and fittings.
Original Equipment Supplier.
Manufactured using high quality OEM materials.
Resistant to thermal wear and cracking.

Condition: New

Shipping Options:
Ground, Overnight, 2 Day

OEM

This Part Fits:

Catalog: A

Vehicle
2003 BMW Z4

Genuine Expansion Tank

(Read reviews)

Part Number: 1196-05820586

Notes: Engine Coolant Reservoir

Condition: New

Shipping Options:
Ground

This Part Fits:

Catalog: B

Vehicle	Body
2003 BMW Z4	E85

Vaico Expansion Tank

(Read reviews)

Part Number: W0133-1815606

Features:

OE-Equivalent and Direct Fit for easy Installation.
OE style connections and fittings.
Made of highly durable materials.
Resistant to thermal wear and cracking.

Condition: New

Shipping Options:
Ground, Overnight, 2 Day

This Part Fits:

Catalog: A

Vehicle
2003 BMW Z4

APA/URO Parts Expansion Tank

(Read reviews)

Part Number: 1196-05638730

Notes: Engine Coolant Reservoir

Condition: New

Shipping Options:
Ground

This Part Fits:

Catalog: B

Vehicle
2003 BMW Z4

Dorman Expansion Tank

(Read reviews)

Part Number: W0133-3711784

Notes: OE Solutions

Condition: New

Shipping Options:
Ground, Overnight, 2 Day

This Part Fits:

Catalog: A

Vehicle
2003 BMW Z4

Expansion Tank Reviews - 2003 BMW Z4

Dorman | 603-659

Great product for my z4 m54. Came compete and fit properly

December 25th, 2020 | Posted by Z4

Febi | 17-11-7-573-751

Fast delivery and parts are always a perfect fit. Thank you

May 11th, 2018 | Posted by TNixon

Genuine | W0133-1815606

I was very suprised to find any BMW parts on this website....I really thought I'd be heading to the dealer. It was an exact fit and was shipped quickly.

April 21st, 2014 | Posted by Expansion tank