American Axle & Manufacturing (AAM) reported Q1 2012 sales of US$751.5m, an increase of 16.4% on the same quarter last year.
The company said that its net earnings were USD51.2m, up from $37.7m last year.
"AAM achieved solid financial results in the first quarter of 2012, with strong sales growth driving higher earnings,” chairman and CEO Richard Dauch said in a statement.
“These results reflect the favourable impact of increased production volumes across many of our major product programmes and sustained improvements in capacity utilisation."
The figures include restructuring costs of $16.5m mostly relating to the closure of AAM’s Detroit and Cheektowaga factories, he said.
The company noted that its content-per-vehicle in the North American light truck and SUV market was $1,475.
Q1 sales to non-General Motors companies grew by 8.5% to USD193.6m.