Campaigners have been assured a bus will soon return to its full route after being cut short for more than two months.
The 235 bus route, from Sunbury to Brentford, was extended in 2013 to serve the new Great West Quarter development in Ealing Road, Brentford.
However, buses have again been terminating at Brentford County Court, in the High Street, where the route used to finish, since the beginning of May.
"Outraged" protesters say the curtailment has left many elderly and disabled passengers, who rely on public transport, cut off.
Transport for London (TfL) blamed a broken bollard which it said has prevented buses from accessing the GWQ estate.
But passengers claim the fault has taken far too long to fix and they have been left in the dark until now about when normal service would resume.
They had raised concerns the route would be permanently shortened following complaints from some people living on the estate about noise and damage caused by buses terminating there.
But TfL has now promised passengers the bus will begin serving the GWQ estate again but says it is not able to give a date at this stage as it is waiting for the work to be carried out by Barratt, which manages the estate.
Peter Bradley, TfL's head of consultation, said: "Route 235 buses currently terminate at Brentford County Court, owing to repairs being undertaken on a bollard that allows buses access to GWQ.
"When the repairs are completed route 235 will begin serving GWQ again. We apologise to passengers for any disruption to their journey in the interim."
'Better as part of Ealing'
The route's temporary shortening has caused consternation among those living on the GWQ estate and homes nearby.
Julie Brooker, chairwoman of the Claypond Estate Residents' Association, just north of the development, said residents there were "outraged" the service had been cut short.
She blamed an "unrepresentative clique" on the GWQ estate for the curtailment, which she said had left elderly and disabled people, as well as parents with young children, having to get two buses just to reach Hounslow.
"North Brentford residents are very angry that there has been no consultation, no information, and no attempt to establish their views or to determine their needs," she added.
"They feel they would be better off if the borough boundaries were re-drawn and they were part of Ealing.
"If the 235 no longer stops at GWQ residents DEMAND the route be extended to Clayponds Avenue, where several possible sites for a bus stand can be found. They also DEMAND the return of the Section 106 money (money from developers for improvements to the local infrastructure) to be used for community purposes."
When TfL previously responded to complaints from residents at the GWQ estate about buses stopping there it said it had no plans to move the terminus as it was used by about 250 passengers a day.
Martin Webb, who uses the 235, said many elderly passengers currently had to get two buses just to reach their local Morrisons supermarket and he did not understand why the fault was taking so long to fix.
He told getwestlondon he had made numerous enquiries about when the full service would resume, having previously read it would be restored on June 21.
He finally heard back from TfL on Tuesday (July 7), telling him the GWQ stop would be back in action soon but he said: "I won't be holding my breath".