Product guide

febi bilstein 103446 Coolant Expansion Tank with Sensor

The febi bilstein 103446 is a coolant expansion tank listed with a sensor for selected Volkswagen Group vehicles. Its stated fitment spans models from VW, Audi, SEAT and Škoda, so confirm the exact vehicle identification and restrictions before ordering.

At a glance

Listed as a coolant expansion tank with sensor for coolant-level monitoring and cooling-system expansion.
The fitment examples cover selected VW, Audi, SEAT and Škoda models.
The listing specifies two connections with diameters of 8 mm and 16 mm.

Price

£19.88Save 24%

Reference price: ~~£25.99~~

Price checked: 12 Nov 2026

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Often bought together

Holts HAFR0006B Antifreeze Coolant for VW, Audi, Seat, Skoda G12/G12+/G12++/G13/G12 EVO, -30°C, Pink, 5 Litre

£21.99

febi bilstein 103522 Radiator Cap for coolant expansion tank, pack of one

£8.58

Pros and cons

Pros

The stated vehicle list and OE comparison number give buyers specific references to check against their existing part.
The listing supplies dimensions, weight, material and connection details for a pre-purchase fit check.

Technical specifications

9 specifications

Identity
Brand	febi bilstein
Model	103446

Dimensions and installation
Mounting type listed	Flange Mount
Dimensions listed	20.5 x 20.5 x 15.8 centimetres
Weight listed	0.38 Kilograms

Materials and temperature
Material	Polypropylene
Upper temperature rating	120 Degrees Celsius

Fitment references
OE number for comparison	VW (5Q0 121 407 F); Audi (5Q0 121 407 F); Seat (5Q0 121 407 F); Skoda (5Q0 121 407 F)
Listed vehicle examples	VW: Golf 7 (5G), Golf 7 (AU), Golf 7 (BQ), Golf 7 Sportsvan (AM), Golf 7 Van (5G), Golf 7 Van (BA), Golf 7 Variant (BA), Golf 7 Variant (BV), T-Roc (A1), Tiguan (BT), Tiguan (BW), Tiguan 4motion (BT), Tiguan Allspace (BW), Touran (5T), e-Golf (BE); Audi: A3 (8V), A3 quattro (8V), Q2 (GA); Seat: Ateca (KH), Ateca 4 motion (KH), Leon (5F); Skoda: Karoq (NU), Kodiaq (NS), Kodiaq 4x4 (NS), Octavia III (5E), Octavia III (NL), Octavia III (NR), Yeti (5L)

What to know before buying

The manufacturer says to confirm compatibility using the vehicle identification and observe all restrictions. The model list is described as suitable examples, not a guarantee for every vehicle variant.

Who is it for?

A good fit for

Owners or repairers replacing a coolant expansion tank on a listed VW Group vehicle, after confirming exact compatibility.
Buyers checking the listed two-connection layout and connection diameters against the part being replaced.

Less suited to

Buyers who have not verified fitment by vehicle identification, OE reference and applicable restrictions.
Vehicles outside the listed examples unless compatibility is confirmed separately.

Customer reviews on Amazon

4.6 / 5 · 182 ratings

5 stars76%76%
4 stars14%14%
3 stars8%8%
2 stars0%0%
1 star2%2%

Customer feedback describes the tank as a good replacement that fits well, with one mention of use on a 2014 Audi S3. Those reports are relevant when comparing fitment, but they do not establish compatibility for every listed vehicle variant. The supplied ratings are mostly five-star, alongside some lower ratings, and do not explain the reasons behind those scores.

Positive themes

Customer feedback mentions good fit and replacement-part suitability.

Frequently asked questions

Which vehicles is the febi bilstein 103446 listed for?

Examples include VW Golf 7, T-Roc, Tiguan and Touran, Audi A3 and Q2, SEAT Ateca and Leon, and Škoda Karoq, Kodiaq, Octavia III and Yeti variants. Check your vehicle identification and all fitment restrictions before purchase.

What connection sizes are specified?

The listing states two connections and gives diameters of 8 mm and 16 mm.

Does this tank include a sensor?

The product title describes the tank as being with a sensor, and the listing identifies its use as coolant-level monitoring. Confirm the selected listing and supplied component details if the sensor is essential to your repair.