The motor vehicle exhaust gas heat exchanger has a flow switching valve (20) in one manifold (4,5). At least the main part of the gas stream passing through the cooled flat tube (3) or through at least one non-cooled flat tube is steerable via the valve. S...

An air mass sensor (7) is arranged directly in the exhaust gas recirculation line (6) upstream of the exhaust gas recirculation valve (3). An exhaust gas cooler (8) may be integrated in the exhaust gas recirculation line. The valve (3) and exhaust gas sens...