PATRON p100074 — Coolant Expansion Tank
Where to buy
Enter your VIN or make, model and year: the AI consultant will check compatibility and suggest a replacement if it does not fit.
What this part is
PATRON p100074 is a coolant expansion tank made of polymer material. The part is supplied without a cap and without a sensor, so when replacing it you should separately check the condition of the original cap and sensor. The tank is designed to compensate for the volume of coolant as it heats up and cools down.
The tank is used on OPEL ASTRA J GTC vehicles with 1.4 and 1.4 Turbo petrol engines, as well as on CHEVROLET CRUZE (J300) with 1.4 and 1.6 engines. When selecting, it is important to cross-check the p100074 number against the data for the specific vehicle, and also to take the configuration into account: this version has no cap and no sensor. In total, the catalog lists fitment for 98 positions, so compatibility should be checked by VIN or by the exact modification.
Cars that fit p100074
ASTRA J GTC 1.4 (08) (10.2011 - 11.2013)
ASTRA J GTC 1.4 Turbo (08) (10.2011 - 04.2018)
ASTRA J GTC 1.6 CDTI (08) (07.2014 - 04.2018)
ASTRA J GTC 1.6 SIDI (08) (07.2013 - 04.2018)
ASTRA J GTC 1.6 SIDI (08) (12.2012 - 04.2018)
ASTRA J GTC 1.6 Turbo (08) (10.2011 - 06.2013)
ASTRA J GTC 1.7 CDTI (08) (03.2012 - 10.2013)
and 51
CRUZE (J300) 1.4 (09.2010 -)
CRUZE (J300) 1.6 (05.2009 -)
CRUZE (J300) 1.6 (12.2012 -)
CRUZE (J300) 1.7 D (01.2012 -)
CRUZE (J300) 1.7 TD (11.2013 -)
CRUZE (J300) 1.8 (05.2009 -)
CRUZE (J300) 2.0 CDI (05.2009 -)
and 22
Check the part by VIN before buying: fitment depends on the engine and model year.
Cross-references and replacements for p100074
| Brand | Number | Name | Price from |
|---|---|---|---|
| STC | T403989 | Tank | — |
| BSG AUTO PARTS | BSG 16-550-006 | Бачок расширительный | — |
| SWAG | 40 94 8610 | Tank | — |
| WILMINK GROUP | WG2360194 | Компенсационный бак, охлаждающая жидкость | — |
| Metalcaucho | 03989 | Tank | — |
| BUGIAD | BMC19014 | — | |
| MTR | 12191641 | Компенсационный бак, охлаждающая жидкость | — |
| AKRON MALO | 117169 | Бачок | — |
| FARE SA | 13666 | Tank | — |
| NTY | CZW-PL-002 | Бачок расширительный OPEL ASTRA J 10- CASCADA 13- CHEVROLET CRUZE 09- ORLANDO 10 | — |
| METZGER | 2140198 | Tank | — |
| VEMA | 163072 | CADDY BOX | — |
| HEPU | TM6326 | Компенсационный бак, охлаждающая жидкость | — |
| AKRON-MALÒ | 117219 | CADDY BOX | — |
| Zekkert | BD-1017 | Бачок расширительный Chevrolet Cruze (J300) 09- Cruze (J305 J308) 11- Orlando (J309) 11- O | — |
| ESEN SKV | 61SKV394 | Компенсационный бак, охлаждающая жидкость | — |
| WILMINK GROUP | WG1795682 | Tank | — |
| ORIGINAL IMPERIUM | 44212I | Tank | — |
| TOPRAN | 208 605 | Tank | — |
| MAXGEAR | 77-0058 | Компенсационный бак, охлаждающая жидкость | — |
| VAUXHALL | 13393368 | Expansion Tank, coolant | — |
| GK | 706326 | Компенсационный бак, охлаждающая жидкость | — |
| ESEN SKV | 61SKV393 | Компенсационный бак, охлаждающая жидкость | — |
| AUTOMEGA (DELLO) | 210000310 | Бачок | — |
| OSSCA | 18489 | Tank | — |
| TRICLO | 488352 | Tank | — |
| OPEL | 1304004 | Expansion Tank, coolant | — |
| STELLOX | 75-51243-SX | бачок расширительный Opel Astra J 1.4-2.0CDTi 09 | — |
| JP GROUP | 1214701300 | Бачок расширительный CHEVROLET CRUZE | — |
| OPEL | 1304028 | Expansion Tank, coolant | — |
Prices are market minimums according to Kulisa Data as of 22.10.2026, excluding delivery.
How to choose and what to check
Among the alternatives available are STC T403989, BSG AUTO PARTS BSG 16-550-006, SWAG 40 94 8610, WILMINK GROUP WG2360194, Metalcaucho 03989 and BUGIAD BMC19014 — when choosing, compare the configuration, whether a cap and sensor are included. Compatibility is best checked by VIN or by the exact engine name and year of manufacture, not just by the model. The expansion tank is replaced in cases of cracks, leaks, damaged fittings or an unstable coolant level.
Frequently asked questions
What alternatives are there for the PATRON p100074 tank?
The list of popular alternatives includes STC T403989, BSG AUTO PARTS BSG 16-550-006, SWAG 40 94 8610, WILMINK GROUP WG2360194, Metalcaucho 03989 and BUGIAD BMC19014. Before buying, check the configuration: some versions may handle the cap or sensor differently.
How do I select the tank by VIN or by vehicle?
The most reliable way is to check the p100074 number by VIN, and if that is not available, by the exact model, engine and year of manufacture. For OPEL ASTRA J GTC and CHEVROLET CRUZE (J300) it is important to take into account the 1.4, 1.4 Turbo or 1.6 engine modification.
When should the expansion tank be replaced?
Reasons for replacement include cracks, coolant leaks, damaged fittings or an unstable level in the tank. The part is also replaced if the plastic has lost its sealing properties or the mounts no longer hold the tank.
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