Magento - get a list of bundled product ids from a product id

Question

Lets say I load my product object:

$product = Mage::getModel(\'catalog/product\')->load($productId);

Is there a function or some way to

Answer 1

Try this-

$collection = $product->getTypeInstance(true)
    ->getSelectionsCollection(
        $product->getTypeInstance(true)
                ->getOptionsIds($product), $product);

foreach ($collection as $item) {
    # $item->product_id has the product id.
}