diff --git a/build.gradle.kts b/build.gradle.kts
index 5f24d090..836d2906 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -19,6 +19,7 @@ val mockitoInlineVersion = "5.2.0"
 val testContainersVersion = "1.19.8"
 val mockkVersion = "1.13.10"
 val springMockkVersion = "4.0.2"
+val otelVersion = "1.42.1"
 
 val githubUser: String by project
 val githubPassword: String by project
@@ -52,6 +53,8 @@ dependencies {
 
     implementation("io.micrometer:micrometer-registry-prometheus")
 
+    implementation("io.opentelemetry:opentelemetry-api:$otelVersion")
+
     implementation("org.projectreactor:reactor-spring:1.0.1.RELEASE")
 
     implementation("org.flywaydb:flyway-core")
diff --git a/src/main/kotlin/no/nav/klage/config/FileClientConfiguration.kt b/src/main/kotlin/no/nav/klage/config/FileClientConfiguration.kt
index e7e40bfa..f532087a 100644
--- a/src/main/kotlin/no/nav/klage/config/FileClientConfiguration.kt
+++ b/src/main/kotlin/no/nav/klage/config/FileClientConfiguration.kt
@@ -17,6 +17,5 @@ class FileClientConfiguration(private val webClientBuilder: WebClient.Builder) {
     fun fileWebClient(): WebClient =
         webClientBuilder
             .baseUrl(url)
-            .defaultHeader(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
             .build()
 }
diff --git a/src/main/kotlin/no/nav/klage/config/PdlClientConfiguration.kt b/src/main/kotlin/no/nav/klage/config/PdlClientConfiguration.kt
index daea8d7c..7dce0b05 100644
--- a/src/main/kotlin/no/nav/klage/config/PdlClientConfiguration.kt
+++ b/src/main/kotlin/no/nav/klage/config/PdlClientConfiguration.kt
@@ -23,8 +23,6 @@ class PdlClientConfiguration(private val webClientBuilder: WebClient.Builder) {
     fun pdlWebClient(): WebClient {
         return webClientBuilder
             .baseUrl(pdlUrl)
-            .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
-            .defaultHeader(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
             .defaultHeader("Nav-Consumer-Id", username)
             .defaultHeader("TEMA", "KLA")
             //Fra behandlingskatalogen
diff --git a/src/main/kotlin/no/nav/klage/config/SafselvbetjeningClientConfiguration.kt b/src/main/kotlin/no/nav/klage/config/SafselvbetjeningClientConfiguration.kt
index fb30f252..0e106051 100644
--- a/src/main/kotlin/no/nav/klage/config/SafselvbetjeningClientConfiguration.kt
+++ b/src/main/kotlin/no/nav/klage/config/SafselvbetjeningClientConfiguration.kt
@@ -17,7 +17,5 @@ class SafselvbetjeningClientConfiguration(private val webClientBuilder: WebClien
     fun safselvbetjeningWebClient(): WebClient =
         webClientBuilder
             .baseUrl(url)
-            .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
-            .defaultHeader(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
             .build()
 }
diff --git a/src/main/kotlin/no/nav/klage/config/WebClientCustomizer.kt b/src/main/kotlin/no/nav/klage/config/WebClientCustomizer.kt
new file mode 100644
index 00000000..ef3c9ddc
--- /dev/null
+++ b/src/main/kotlin/no/nav/klage/config/WebClientCustomizer.kt
@@ -0,0 +1,47 @@
+package no.nav.klage.config
+
+import io.opentelemetry.api.trace.Span
+import org.springframework.boot.web.reactive.function.client.WebClientCustomizer
+import org.springframework.http.HttpHeaders
+import org.springframework.http.MediaType
+import org.springframework.http.client.reactive.ReactorClientHttpConnector
+import org.springframework.stereotype.Component
+import org.springframework.web.reactive.function.client.ClientRequest
+import org.springframework.web.reactive.function.client.ExchangeFilterFunction
+import org.springframework.web.reactive.function.client.WebClient
+import reactor.core.publisher.Mono
+import reactor.netty.http.client.HttpClient
+
+/**
+ * Common configuration for all web clients.
+ */
+@Component
+class WebClientCustomizer : WebClientCustomizer {
+
+    override fun customize(webClientBuilder: WebClient.Builder) {
+        val headersWithTraceId = listOf(
+            "Nav-Call-Id",
+            "Nav-Callid",
+            "X-Correlation-ID",
+        )
+
+        webClientBuilder
+            .clientConnector(ReactorClientHttpConnector(HttpClient.newConnection()))
+            .defaultHeader(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_JSON_VALUE)
+            .defaultHeader(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE)
+            .filter(
+                ExchangeFilterFunction.ofRequestProcessor { request ->
+                    val traceId = Span.current().spanContext.traceId
+                    Mono.just(
+                        ClientRequest.from(request)
+                            .headers { headers ->
+                                headersWithTraceId.forEach { headerName ->
+                                    headers[headerName] = traceId
+                                }
+                            }
+                            .build()
+                    )
+                }
+            )
+    }
+}
\ No newline at end of file