Sydney Trains has an extensive fleet of trains operating throughout the Sydney suburban network. Rolling stock in operation consists entirely of double-deck electric multiple units. All services (except 
and 
) consist of 8 cars, with older trains running as two coupled sets.
Sydney Suburban Fleet[]
K86
K set[]
K sets were manufactured by A Goninan & Co. and were the first air-conditioned suburban trains. The first cars built - four two-car sets - were air-conditioned, the remainder of the fleet were built with forced-air ventilation, and were subsequently retrofitted with air-conditioning. They follow the general configuration of the previous stainless steel generation (S sets), but are distinguished by a flat section above the drivers cabin. They are currently all in 4 car sets and were introduced between 1981 and 1985. It is also known as the oldest remaining train set. These sets are due to retire when the new Intercity D Set fleet goes into Service.
T54 with 'M set' style doors
T set (Tangara)[]
Tangara trains (T sets) are the third generation of electric rollingstock on the Sydney Trains suburban network and were manufactured by A Goninan & Co. They feature a distinctive sloped appearance at the cab ends and are in 4 car sets. They were introduced between 1988 and 1994, replacing the last of the first generation single deck electric “Red Rattler” trains which had operated for many decades. The Tangaras introduced new covered gangways between carriages with dual sliding doors, allowing passengers to more easily walk between carriages and without exposure to the weather. The first set to enter service was T20, followed shortly by T70 and T1.
A variant of the suburban Tangara formerly known as G sets were introduced between 1994 and 1995. These ran on shorter interurban services such as to Springwood and Wyong. Unlike the T sets, they had luggage racks, reversible seats, a unisex toilet in each 4 car set and a door release function for use with shorter platforms in outer suburban areas. These trains also operated on longer suburban runs, especially outside of peak hours. Following the introduction of the OSCARs, the G Sets were converted into purely suburban trains and reclassified as T Sets. The toilets were removed during the conversion process but many of the other unique features remain intact.
M set (Millennium)[]
M26 at Liverpool station
Millennium trains (M sets) were introduced between 2002 and 2005, constituting the fourth generation of Sydney Trains suburban rollingstock. These were the first suburban trains in Sydney fitted with a multiphase alternating current traction system. The trains are arranged into 4 car sets. They replaced the Tulloch trailers which the R and S sets ran with.
The M sets were the first class of train to introduce DVA (digital voice announcement) and PIDS (passenger information display system) technology onboard each carriage to inform passengers of stopping patterns and the next stopping station. The PIDS screens are located on both ceiling ends of the upper and lower decks, as well as above the gangway doors.
A and B sets (Waratah)[]
B2 (left) and A76 (right) at Revesby station
Waratah trains are the newest rolling stock in the Sydney Trains fleet. Based on the M Set, the design incorporates a number of advancements including 'smart' air conditioning that alters based on outside conditions and amount of passengers on board, extensive use of LED lighting, internal and external closed-circuit television cameras, and a redesigned vestibule area with a wider entrance area and increased priority seating. Waratahs are also the first fleet to feature an indivisible eight-car configuration. The trains are largely manufactured in China by the Changchun Railway Vehicles Company Ltd., with internal fitting-out performed by Downer Rail in Australia. The first Waratah A set train (set A3) entered service on 1 July 2011. There are a total of 78 A sets, operating all suburban services except for the Eastern Suburbs & Illawarra Line.
In December 2016, 24 new trains of a similar design were ordered. These were known as the Series 2 Waratah, coded as B sets. The B sets were ordered for a new timetable and to replace the remaining S sets, Set B2 was the first B set to enter service followed by B3 a few weeks afterwards. B sets are almost identical to A sets, however, they have a different livery and use LCD internal displays.
In January 2019, 17 more B sets were ordered ahead of the state election, extending the B set fleet to 41. The second B set batch will feature rail fault detectors which will also be likely to be also be fitted in Tangaras during their life extension.
Withdrawn Fleet[]
S49 at Clyde station
S sets[]
S sets were a class of electric multiple unit operated by Sydney Trains. The carriages are of stainless steel, double deck construction and are not air-conditioned. The fleet were slowly phased out with the introduction of the Waratahs, and were later completely retired in 2019, with all rosters being taken over by other air conditioned fleets. It is said that they were retired for their lack of air conditioning.
C13 at Bardwell Park station
C set (Chopper)[]
C sets were a class of electric multiple unit manufactured by A Goninan & Co. They were introduced in 1986 due to a delay in the design and introduction of the Tangara trains, with the C sets introducing various features that would later be included for the Tangara fleet. At time of withdrawal, they ran in 4 car sets and are the last of the second generation. They are distinguished by a moulded fiberglass section on the front and rear ends. They were the first trains to introduce chopper control motors (hence the “C” initial) and the unpopular fixed seating, which has half the seats on the upper and lower decks face backwards. They were finally retired and serviced out in 2021 for one carriage of C10, C3594, suffered a slipped pinion and the motor-trailer pair was swapped with a pair from C4.