diff --git a/pcsx2/GS/Renderers/HW/GSTextureCache.cpp b/pcsx2/GS/Renderers/HW/GSTextureCache.cpp
index 9b5324bf32..ded31f5507 100644
--- a/pcsx2/GS/Renderers/HW/GSTextureCache.cpp
+++ b/pcsx2/GS/Renderers/HW/GSTextureCache.cpp
@@ -810,7 +810,12 @@ void GSTextureCache::ExpandTarget(const GIFRegBITBLTBUF& BITBLTBUF, const GSVect
 		}
 	}
 	
-	if (dst)
+	if (!dst)
+		return;
+
+	// Only expand the target when the FBW matches. Otherwise, games like GT4 will end up with the main render target
+	// being 2000+ due to unrelated EE writes.
+	if (TEX0.TBW == dst->m_TEX0.TBW)
 	{
 		// Round up to the nearest even height, like the draw target allocator.
 		const s32 aligned_height = Common::AlignUpPow2(r.w, 2);
@@ -829,6 +834,14 @@ void GSTextureCache::ExpandTarget(const GIFRegBITBLTBUF& BITBLTBUF, const GSVect
 			}
 		}
 	}
+	else
+	{
+		const GSVector4i clamped_r(
+			r.rintersect(GSVector4i(0, 0, static_cast<int>(dst->m_texture->GetWidth() / dst->m_texture->GetScale().x),
+				static_cast<int>(dst->m_texture->GetHeight() / dst->m_texture->GetScale().y))));
+		AddDirtyRectTarget(dst, clamped_r, TEX0.PSM, TEX0.TBW);
+		dst->UpdateValidity(clamped_r);
+	}
 }
 // Goal: Depth And Target at the same address is not possible. On GS it is
 // the same memory but not on the Dx/GL. Therefore a write to the Depth/Target