So far, at least seven complaints in the last two weeks have been filed with the National Highway Traffic Safety Administration, saying the repairs to pedals and floor mats have not stopped their cars from surging unexpectedly, the paper reports.

In one of the reports filed with NHTSA, a 2010 Camry owner who had their car repaired Feb. 12 in Michigan said it accelerated up a snow bank just five days later after receiving special brake override software, the complaint said.

Edmunds.com offers $1-million prize for Toyota fix
The auto information and pricing company is launching a public competition to find a solution to the carmaker's unintended-acceleration problem.

NEW YORK (CNNMoney.com) -- Federal safety regulators said Wednesday they have received 10 complaints from drivers alleging sudden acceleration in Toyota vehicles that have already been repaired under the automaker's recent recall.

The National Highway Traffic Safety Administration said it has reached out to the consumers in question to gather more information about the complaints, which were not immediately verifiable.

"NHTSA has already started contacting consumers about these complaints to get to the bottom of the problem and to make sure Toyota is doing everything possible to make its vehicles safe," David Strickland, NHTSA's administrator, said in a prepared statement.

"If Toyota owners are still experiencing sudden acceleration incidents after taking their cars to the dealership, we want to know about it," he added.

Cindy Knight, a Toyota spokeswoman, said the company is aware of the post-repair complaints and has asked NHTSA to help Toyota contact the customers in question.

"We are confident that our Toyota vehicles are safe, and we're doing everything we can to ensure our customers are satisfied with the repairs we've been making," Knight said. "We have rigorously tested those solutions the Toyota engineers have developed and we're very aggressively investigating any complaints."

How rigorous could the testing have been when the fix came in only two or three weeks?

Toyota has recalled more than 8 million vehicles worldwide for problems related to sudden acceleration, which have been blamed for several accidents resulting in injuries and death. The automaker has repeatedly apologized for the lapses in quality control, and Toyota technicians are working extended hours to repair the recalled vehicles.

In testimony before the U.S. Senate Tuesday, Toyota executives said the automaker has already serviced about 1 million of the recalled vehicles.

The sudden acceleration issue has been in the spotlight since it was disclosed last month that an accident involving a Toyota vehicle killed four people in San Diego last August.

That accident sparked the recall of millions of Toyota vehicles for problems with floor mats that could cause accelerator pedals to become trapped. Toyota has subsequently recalled millions more cars for "sticky" accelerator pedals.

Since 2000, NHTSA has identified a total of 43 complaints of fatal incidents that allegedly involved sudden acceleration in Toyota vehicles. While those complaints have not yet been confirmed, the reported incidents led to 52 fatalities and 38 injuries, NHTSA said.

Toyota has come under increasing pressure from Washington, with executives going before Congress in three separate hearings over the last two weeks.

Rep. Bruce Braley, D-Iowa, said he is "deeply concerned" about the possibility that repaired Toyota vehicles may still be prone to sudden acceleration.

"If these reports prove to be true, it is completely unacceptable that America's families are once again being put at risk," Braley said in a statement.

In a letter to Transportation Secretary Ray LaHood, the congressman said the complaints highlight the need for a "thorough and credible investigations" into Toyota's safety record. He also questioned the effectiveness of recalls in ensuring the safety of the American public.

NEW YORK (CNNMoney.com) -- Toyota's new incentive plan appears to have piqued the interest of buyers looking to snag a good deal, reports showed Thursday, even as the automaker's recall woes linger.

Edmunds.com and kbb.com, Web site of Kelly Blue Book, both reported significant increases in traffic among users expressing serious interest in Toyota vehicles since the automaker announced a new incentive plan on Tuesday.

"Purchase intent" for Toyota vehicles surged 40% to a 14-month high Tuesday, according to Edmunds.com. Purchase intent measures pricing research done by potential buyers on its site. Edmunds said there is a "strong correlation" between purchase intent and actual sales.

"Because of the Toyota recall, people have been closely watching the company's moves," David Tompkins, a senior analyst at Edmunds.com, said in a statement. "Many were ready to take action upon hearing the announcement of this highly-anticipated incentives program."

According to its own research, Kelly Blue Book said shopper activity for Toyota cars from Tuesday to Thursday rose 44% this week versus the same period last week. Shopper activity includes car configuration, which the Kelly Blue Book gauges as an accurate indicator of buyer intent.

A Toyota representative stressed that it's too soon to say anything conclusive about the incentives. However the representative added that there is some "anecdotal evidence" to suggest that showroom traffic is increasing: "We are cautiously optimistic."

Toyota offered an official rebuttal to Professor David Gilbert’s claim of unintended acceleration in Toyota vehicles last week, but offered little in the way of actual evidence. However, Toyota has made its findings known, hosting a Webcast earlier on Monday.

In the Webcast, engineers from Toyota and testing firm Exponent detailed Professor Gilbert’s findings. Although Gilbert’s methods proved to be a viable way to create unintended acceleration in a Toyota vehicle, Toyota was able to explain why Gilbert’s discovery was extremely unlikely to happen in real world driving.

In a nutshell, Gilbert’s method involved stripping of three wires in the vehicle’s accelerator electronics, followed by the introduction of a 200 ohm resistor between two of the wires. The process results in an out of control engine, but is also highly unlikely to ever occur in the wild.

Moreover, Toyota was able to demonstrate the same phenomena in other vehicles using the same technique, all without triggering a diagnostic trouble code. During the Webcast, Toyota was able to recreate unintended acceleration in several vehicles, including a Chevrolet Malibu, Ford Fusion, BMW 3-Series and Subaru Outback.

Although Toyota’s demonstration appears to have debunked Professor Gilbert’s theory on unintended acceleration, it still hasn’t exonerated vehicle electronics from Toyota recent safety woes.