This content requires the base game Train Simulator 2017 on Steam in order to play.

User reviews:
Positive (4 reviews) - 100% of the 4 user reviews for this game are positive.
Release Date: Jun 5, 2014

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Downloadable Content

This content requires the base game Train Simulator 2017 on Steam in order to play.

Buy Train Simulator: Network SouthEast Class 121 DMU


About This Content

Arguably the most useful of first generation diesel multiple units (DMUs), the Class 121 ‘Bubble Car’ comes to Train Simulator in distinctive Network SouthEast livery.

The unusual single-car units were manufactured by Pressed Steel Company from 1960 onwards and introduced by British Rail for use mainly on the Western Region and around London on suburban and branch line duties. Their distinctive exhaust pipes designed to fit around a large four-digit headcode indicator box made these units fondly regarded by rail fans for their unpretentious appearance and old-fashioned interior and performance characteristics.

The ‘Bubble Cars’ became familiar for running Network SouthEast services and upon privatisation of British Rail, the fleet was operated by only one passenger company – Silverlink – with several more units in departmental duties with Railtrack. Today, two Class 121 models remain in revenue generating service with Chiltern Railways, representing the last chance to ride on 1960s slam-door stock on the main line in the UK and signifying a remarkably long life for these fans’ favourite. Five motor cars also remain in preservation across heritage railways in the UK.

The Class 121 for Train Simulator recreates the model as it operated for Network SouthEast between London and the western Home Counties in the 1980s. Features include the prominent exhaust pipes at the motor end, manual gear change and passenger view with a slightly weathered finish.

The locomotive is also Quick Drive compatible, giving you the freedom to drive the Network SouthEast Class 121 on any Quick Drive enabled route for Train Simulator, such as those available through Steam. Also included are scenarios specifically for the Great Western Main Line route (available separately and required to play these scenarios).


Three scenarios for the Great Western Main Line route:
  • Training: Class 121 Simple & Expert Controls
  • Tourist Shuttle
  • No Go for Greenford

More scenarios are available on Steam Workshop online and in-game. Train Simulator’s Steam Workshop scenarios are free and easy to download, adding many more hours of exciting gameplay. With scenarios being added daily, why don’t you check it out now!

Click here for Steam Workshop scenarios.

Key Features

  • Class 121 ‘Bubble Car’ in Network SouthEast livery
  • Exhaust pipes
  • Manual gear change
  • Passenger view
  • Quick Drive compatible
  • Scenarios for the Great Western Main Line route
  • Download size: 157mb

System Requirements

    • OS:Windows® Vista / 7 / 8
    • Processor:Processor: 2.8 GHz Core 2 Duo (3.2 GHz Core 2 Duo recommended), AMD Athlon MP (multiprocessor variant or comparable processors)
    • Memory:2 GB RAM
    • Graphics:512 MB with Pixel Shader 3.0 (AGP PCIe only)
    • DirectX®:9.0c
    • Hard Drive:6 GB HD space
    • Sound:Direct X 9.0c compatible
    • Other Requirements:Broadband Internet connection
    • Additional:Quicktime Player is required for playing the videos
    • Graphics:Laptop versions of these chipsets may work but are not supported. Updates to your video and sound card drivers may be required
    • Additional:Quicktime Player is required for playing the videos
Customer reviews
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Positive (4 reviews)
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4 reviews match the filters above ( Positive)
Most Helpful Reviews  Overall
11 of 12 people (92%) found this review helpful
Posted: November 3, 2014
This 'Bubble Car' is fairly easy to drive, if you're familiar with Diesel-Mechanical units that is. My only complaint is how terrible the brakes are, therefore I wouldn't recommend playing the included 'No Go For Greenford' scenario if your completly confident in your skills. Still a great unit though. I recommend adding her to your collection.
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4 of 5 people (80%) found this review helpful
Posted: March 7, 2015
There is a great level of detail with this DMU and highly appriciate the cabin view. Tho I suggest turning this into an Advanced model, I would love to operate all leavers and knobs, open a window and a doors, something for Railworks to consider. I recomend for sound enhancement, Armstrong powerhouse Pro Sound pack for this engine,
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3 of 4 people (75%) found this review helpful
Posted: July 6, 2015
I really like this little DMU, so usefull over those lesser populated routes.
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1 of 1 people (100%) found this review helpful
1 person found this review funny
Posted: August 15
I had a lot of fun with this DLC. A lot of fun. I don't care much about whether or not all the lights work or if you have 12 sun visors and there should only be 7. The windows do not need to open. What needs to happen, is you need to quick drive this bubble car on the Canadian Mountain Passes Route and start at Lake Louise or Eldon. Set the end to Revelstoke. I got to 105 before I derailed going into a tunnel. It was majestic. Could you imagine doing 105 bloody miles per hour in that tin can? Good god!
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