Supplementary article / supplementary information 2
with thermostat
Further reading/Further information
with seals
Observe the system’s capacity
✓
Logistics and customs
Weight
1.5 kg
Check parts compatibilityIdentify your vehicle by plate, VIN or model.
Also compare the OE reference shown on your original part.
Clearly identified references
Compatibility checked before purchase
Delivery calculated before payment
Technical specifications
Type of cooling
water-cooled
Case material
Aluminium
Supplementary article / supplementary information 2
with thermostat
Further reading/Further information
with seals
Observe the system’s capacity
✓
Logistics and customs
Weight
1.5 kg
References
Manufacturer ref.
503 521
KonexAuto ref.
KX2201051018839
IAM
503 521
TRADE_NUMBER
503 521 001
Comparable OE references
BMW
1721 7 601 951
7 601 951
1721 7 638 580
7 638 580
Use the OE reference together with your vehicle to identify the correct part.
Open this tab to browse the vehicles associated with this part.
Replacement parts
Frequently asked questions
How do I check compatibility?
Select the exact vehicle, then compare OE references and fitting criteria with the original part.
Where can I check price and availability?
The purchase panel displays this part’s price and availability. Commercial information is checked before ordering.
How can I find the collection or delivery date?
Enter the requested details under Store collection or Delivery to get an estimate for your order.
How do I request a return or exchange?
Contact KonexAuto within 14 days of delivery with your order number and the part concerned. We will help you with your request.
Returns and exchanges
14 days after delivery
You can request a return or exchange within 14 days of receiving your order. Contact us to arrange the next steps.
1Contact KonexAuto with your order number and the part reference.
2We will explain the steps for your return or exchange.
3Pack the part carefully and follow the return instructions provided.
Product description
Automatic transmission oil cooler TOPRAN 503 521
Brand : TOPRAN. Manufacturer part number : 503 521. Category : Automatic transmission oil cooler.
Specifications : Type of cooling : water-cooled ; Case material : Aluminium ; Supplementary article / supplementary information 2 : with thermostat ; Further reading/Further information : with seals ; Observe the system’s capacity : ✓.
OE cross-reference numbers : BMW : 1721 7 601 951 ; BMW : 7 601 951 ; BMW : 1721 7 638 580 ; BMW : 7 638 580.
Google reviews
Mariam-Estefania Fatima
5/5
Je fais confiance aux entreprises 5 étoiles, et Konex Viry les mérite largement !
✔ Réactivité : Demande faite en fin de journée, réponse en moins de 10 min, pièces disponibles dès le lendemain matin.
✔ Conseil : Vérification des références avant la vente pour éviter toute erreur.
✔ Disponibilité : Flexibilité même après la fermeture pour finaliser ma commande.
✔ Facilité de paiement : Devis envoyé en amont, paiement rapide via un lien.
✔ Service client : Professionnalisme et bonne humeur, même en fin de journée.
Que du positif, foncez les yeux fermés !
(Translated by Google)
I trust 5-star companies, and Konex Viry definitely deserves it!
✔ Responsiveness: I made my request at the end of the day and received a response in less than 10 minutes; the parts were available the very next morning.
✔ Advice: They checked the part numbers before the sale to avoid any mistakes.
✔ Availability: They were flexible, even after closing time, to finalize my order.
✔ Payment Ease: I received a quote upfront, and payment was quick via a link.
✔ Customer Service: Professionalism and a friendly attitude, even at the end of the day.
Nothing but positive things to say, go for it without hesitation!
aurelie viairon
5/5
Allez y les yeux fermés très sérieux et accueil au top
(Translated by Google)
Go there without hesitation, they are very professional and the service is excellent.
Abdo Rahim
5/5
Super réactif, je recommande ce magasin
(Translated by Google)
Super responsive, I recommend this store
A LP
5/5
Accueil téléphonique très aimable, complément d'informations techniques satisfaisantes. Livraison rapide comme promis :Commande faite lundi matin, pièce reçue jeudi matin. Merci au personnel de Konexauto
(Translated by Google)
Very friendly telephone reception, satisfactory additional technical information. Fast delivery as promised: Order placed Monday morning, part received Thursday morning. Thank you to the Konexauto staff
Michelle Laugier
5/5
Schwahn Vincent
5/5
Très professionnel, je recommande vivement...
(Translated by Google)
Highly professional, I highly recommend...
Mohand ou Rabah Nait Rabah
5/5
salah m'raoui
5/5
binta n'diaye
5/5
Parfait fermeture tardive donc parfait. Je recommande. Merci
(Translated by Google)
Perfect, late opening, so perfect. I recommend it. Thank you.
Coleen NTOKONDA
5/5
Super accueil, le vendeur très à l'écoute. Ils sont pas cher et délai de livraison dans la journée quasiment. Je recommande les yeux fermés 👍🏾
(Translated by Google)
Excellent service, the salesperson was very attentive. They're inexpensive and delivery was almost always the same day. I highly recommend them! 👍🏾
Laraib 786
5/5
Super accueil, le vendeur très à l’écoute. Ils sont pas cher et délai de livraison dans la journée quasiment. Je recommande
(Translated by Google)
Excellent service, the salesperson was very attentive. They're inexpensive and delivery was almost always the same day. I recommend them.
Fabien Bories
5/5
Services rapide et serviable.
Commandé a 13h, récupéré a 15h
Parfait
Merci
(Translated by Google)
Fast and helpful service.
Ordered at 1 PM, picked up at 3 PM.
Perfect.
Thank you.
Le Jaw
5/5
Les Pièces que j’ai commandées le matin à 11h reçu à 16h l’agent comptoir à l’écoute et souriant. Je recommande.
(Translated by Google)
The parts I ordered at 11am were received at 4pm. The counter agent was attentive and friendly. I recommend them.
moustapha Diarra
5/5
Wil Fred
5/5
Service de qualité et rapidité pour la réception des pièces. Commande passée à 9h, réception dès 15h le jour même.
(Translated by Google)
Excellent service and fast delivery of parts. Order placed at 9am, received by 3pm the same day.
William Wetsh
5/5
Aujourd’hui une Très bonnes expérience comme d’hab , on est toujours bien accueilli et conseillé , j’ai mes habitudes chez vous et ça va continuer 🙏
(Translated by Google)
Today was a great experience as usual. We are always warmly welcomed and given excellent advice. I'm a regular customer and I'll continue to be 🙏
GIRESSE KINGOTO NTONA
5/5
Superbe accueil 🤩 Vendeur souriant et très serviable. Magnifique !
(Translated by Google)
Excellent service 🤩 Smiling and very helpful salesperson. Wonderful!
Junior Didjango
5/5
un site clair fluide et transparent. J'ai vite trouvé la pièce correspondant à mon véhicule grâce à l'outil de recherche ultra simplifié et les prix m'ont l'air d'être raisonnable et les différents moyen de recevoir la pièce est intelligent. Je recommande ;)
(Translated by Google)
A clear, user-friendly, and transparent website. I quickly found the part for my vehicle thanks to the ultra-simple search tool, the prices seem reasonable, and the various delivery options are well-designed. I recommend it ;)
armando sain
5/5
jp v
5/5
livraison très rapide rapport qualité prix TOP très Bon contact avec le vendeur je recommande cette Boutique 👍 TOP *****
(Translated by Google)
Very fast delivery, excellent value for money, very good contact with the seller, I recommend this shop 👍 TOP *****
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