FRANKFURT — Volkswagen (VW) investors have filed 1,400 lawsuits claiming a total of €8.2bn in compensation over the German car giant’s emissions cheating scandal, a state court said Wednesday.

The claims are mostly made up of "bundled" actions containing lawsuits from multiple plaintiffs, many of them private investors, according to the court in Brunswick, northern Germany.

The embattled car maker also faces lawsuits from large institutional investors, German state governments and the US government.

Two of the claims lodged with the Brunswick court, from groups of institutional investors, account for a total of €2bn alone.

"The complete registration of the claims arrived up to now should be finished in four weeks," the court said.

Investors have rushed to file compensation claims ahead of what they believe to be a one-year deadline.

The court said it had taken on extra staff and hired additional storage space to cope — as the avalanche represents half the number of cases the tribunal normally hears in a year.

VW admitted in September 2015 to installing so-called "defeat devices" in 11-million diesel-powered vehicles sold around the world, which increase exhaust treatment when the car detects it is undergoing regulatory tests.

The software deactivates the emissions system when the car is on the road, leading to levels of harmful nitrogen oxides in the exhaust many times higher than allowed.

The VW group has set aside €18bn to pay for the legal costs of the crisis, and has so far agreed to pay $15bn in compensation and fines in the US alone.

The car maker faces legal claims and investigations around the world, and analysts estimate that the final bill for the scandal could reach up to €35bn.

Its share price remains about 20% lower than it was before the crisis broke.

But while the financial pain bites deep for the firm, recent figures show sales are holding up despite the blow to its reputation.

"VW continues to believe that we comprehensively fulfilled our obligations under capital markets law and that the claims are unjustified," a spokesperson for the car maker said on Friday.