M32 Gearbox 4th Gear 48T 39mm 55491400 Gen 3 Vauxhall 2016 Onwards
Ex VAT: £58.78
✓ In stock at our Arlesey workshop
Order before 2pm on a working day and this is picked and dispatched the same day by express courier, normally with you in 1–2 working days.
Collection from Arlesey also available — choose it at checkout.
Couldn't load pickup availability
Get it installed
Visit our workshop and have it fitted by our own transmission specialists.
Others often need these
Browse related
Delivery and Shipping
Delivery and Shipping
UK delivery — parts we hold in stock
Ordered before 2pm on a working day, these are dispatched the same day by express courier and normally arrive within 1–2 working days.
Parts supplied from our European supplier
A large part of our range is held by our supplier in Germany rather than on our own shelves. We order these in for you as soon as you place the order. They normally dispatch within 7–10 working days, and are then sent on by express courier like anything else. Nothing ships to you direct from Germany — it comes to our Arlesey workshop first, so you deal only with us for returns and warranty.
Collection from Arlesey
Click and collect is available on parts we physically hold. If an item has to come in from our supplier it cannot be collected, and checkout will tell you so before you pay.
International
3–5 working days once dispatched. Any customs charges or excise duties are the responsibility of the buyer.
*Delivery times are estimates and can be affected by factors outside our control.
Sign Up For Product Deals & Info.
Subscribe Here
M32 Transmission 4th Gear
3rd Generation M32 Vauxhall 2016 Onwards
(48T) 39mm 55491400
Generation 3 M32 4th gear 48 tooth output shaft (28).
Internal Diameter 39mm.
Please note the OE Generation 3 M32 systems use a thicker diameter output shaft at the point where 4th gear sits.
This gear is NOT compatible with the earlier generation 1 or generation 2 M32 gearbox.
Please check the internal measurement of the gear before ordering.
Part Number(s)
55491400
Fitment Location 28 On Diagram

Vehicle Compatibility
Abarth
Abarth Grande Punto, 199 (2007-2009)
Abarth Punto, 199 (2012-2014)
Abarth Punto Evo, 199 (2010-2012)
Alfa Romeo
Alfa Romeo (EU) 147, 937 (2000-2010)
Alfa Romeo (EU) 156, 932 (1997-2007)
Alfa Romeo (EU) 159, 939 (2005-2011)
Alfa Romeo (EU) Brera, 939 (2006-2011)
Alfa Romeo (EU) Giulietta, 940 (2010-2021)
Alfa Romeo (EU) GT, 937 (2004-2011)
Alfa Romeo (EU) Mito, 955 (2008-2020)
Alfa Romeo (EU) Spider, 939 (2006-2011)
Chevrolet
Chevrolet (EU) (Daewoo) Cruze, J300 / J305 / J308 (2009-2014)
Chevrolet (EU) (Daewoo) Orlando, J309 (2010-2014)
Chevrolet (EU) (Daewoo) Trax / Tracker (2013-2014)
Chevrolet (EU) (Daewoo) Aveo, T300 (2011-2014)
Chevrolet (EU) (Daewoo) Malibu, V300 (2011-2015)
Chevrolet (USA / CAN) Cruze, J300 (2010-2016)
Chevrolet (USA / CAN) Cruze (2016-2020)
Chevrolet (USA / CAN) Sonic, T300 (2012-2020)
Opel
Opel ADAM, M13 (2013-2019)
Opel Astra H, A04 (2004-2010)
Opel Astra H TwinTop, A04 (2006-2010)
Opel Astra J, P10 (2009-2018)
Opel Astra K, B16 (2015-2022)
Opel Cascada, W13 (2013-2019)
Opel Corsa D, S07 (2006-2015)
Opel Corsa E, X15 (2015-2019)
Opel Insignia A, G09 (2008-2017)
Opel Insignia B, Z18 (2017-2022)
Opel Meriva A, X03 (2003-2010)
Opel Meriva B, S10 (2010-2017)
Opel Mokka, J13 (2012-2016)
Opel Mokka X, J13 (2016-2019)
Opel Zafira B, A05 (2005-2014)
Opel Zafira C, P12 (2012-2019)
Opel Signum, Z03 (2003-2008)
Opel Vectra C, Z02 (2002-2009)
Vauxhall
Vauxhall ADAM, M13 (2013-2019)
Vauxhall Astra H, A04 (2004-2010)
Vauxhall Astra H TwinTop, A04 (2006-2010)
Vauxhall Astra J, P10 (2009-2018)
Vauxhall Astra K, B16 (2015-2022)
Vauxhall Cascada, W13 (2013-2019)
Vauxhall Corsa D, S07 (2006-2015)
Vauxhall Corsa E, X15 (2015-2019)
Vauxhall Insignia A, G09 (2008-2017)
Vauxhall Insignia B, Z18 (2017-2022)
Vauxhall Meriva A, X03 (2003-2010)
Vauxhall Meriva B, S10 (2010-2017)
Vauxhall Mokka, J13 (2012-2016)
Vauxhall Mokka X, J13 (2016-2019)
Vauxhall Zafira B, A05 (2005-2014)
Vauxhall Zafira C, P12 (2012-2019)
Fiat
Fiat (EU) Bravo, 198 (2007-2015)
Fiat (EU) Croma, 194 (2005-2010)
Fiat (EU) Grande Punto, 199 (2005-2011)
Fiat (EU) Linea, 323 (2007-2014)
Fiat (EU) Punto Evo, 199 (2009-2012)
SAAB
Saab 9-5 (2010-2011)
As M32 gearbox rebuild and repair specialists, Eco Torque is proud to offer genuine gearbox parts as well as high quality aftermarket alternatives throughout its store.
Being one of the first companies in the UK to offer the M32 bearing and end-case upgrade, we pride ourselves on mastering the repairs of the gearboxes we work on.
Browse Eco Torque’s ever-evolving product range available to purchase online
at competitive prices.
If you cannot find the items you need or are unsure if the part is compatible with
your vehicle make and model, please send us your UK registration number or
VIN Code and we will direct you to the right part.
Frequently Asked Questions
Which gearbox does this kit fit?
This is the 4th gear (48 tooth) for the 3rd Generation M32 6-speed gearbox, fitted to Vauxhall, Opel, Fiat, Chevrolet and SAAB models from 2016 onwards. The gearbox code is stamped on the bellhousing — confirm before ordering, and note this gear is not compatible with Gen 1 or Gen 2 M32 gearboxes.
What is included in this kit?
This listing is for a single 4th gear (48 tooth, 39mm internal diameter, part number 55491400) for the Gen 3 M32 output shaft.
Is this OEM quality?
Yes — supplied to OEM specification using quality-graded bearings and seals.
Do I need to drain the gearbox before fitting?
Yes — drain before beginning internal work. Follow the workshop manual for the correct drain and refill procedure.
Reference Number: ET2399
Payment & Security
Payment methods
Your payment information is processed securely.
Please confirm fitment against your vehicle registration or gearbox code before ordering.
Fits these gearbox / transmission codes — check your gearbox code if unsure.









