Coolant Pipe Repair Kit — BMW N52 / N52N / N53 / N51 Engines (Vorlaufleitung)
Fix BMW's Notorious Plastic Coolant Connector Before It Cracks and Overheats Your Engine.
The plastic coolant feed pipe connector (Vorlaufleitung) on BMW N52, N52N, N53, and N51 engines is a well-documented failure point. The factory plastic cracks with age and heat, causing coolant leaks, overheating, and in severe cases, head gasket damage.
This repair kit replaces the deteriorated plastic connector with a durable aluminum fitting — eliminating the failure point permanently. This is the correct fix, not a patch.
What's Included
- Aluminum replacement connector for the coolant feed line to water pump
- All necessary seals for a leak-free installation
Why Replace with Aluminum
- Permanent Fix: Aluminum won't crack or degrade like the factory plastic — fix it once and forget it.
- Prevents Overheating: A coolant leak from this connector can rapidly cause overheating and head gasket failure — a $2,000+ repair. This kit costs a fraction of that.
- Known N52/N53 Failure: This is one of the most common coolant leak sources on these BMW engines. If yours hasn't been replaced yet, inspect it now.
- Wide Platform Coverage: Fits N52/N52N/N53/N51 engines across E81, E82, E87, E88, E90, E91, E92, E93, E60, E61, E63, E64, E65, E66, X1 E84, X3 E83, Z4 E85/E86/E89.
Vehicle Compatibility
| Platform | Years |
|---|---|
| 1 Series E81 / E82 / E87 / E87 LCI / E88 | 2005–2013 |
| 3 Series E90 / E91 / E92 / E93 (and LCI) | 2004–2013 |
| 5 Series E60 / E61 (and LCI) | 2004–2010 |
| 6 Series E63 / E64 (and LCI) | 2004–2010 |
| 7 Series E65 / E66 | 2004–2008 |
| X1 E84 / X3 E83 LCI / Z4 E85 / E86 / E89 | 2004–2011 |
OEM Reference
- 11537516414
Don't wait for it to crack. The N52/N53 plastic coolant connector is heat-stressed every time the engine runs. Most fail between 80,000–120,000 miles. The aluminum replacement is a 30-minute job that prevents a potentially catastrophic coolant loss.
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Orders ship within 1–2 business days.
Standard delivery:
- USA: Some items ship from our US warehouse and arrive within 3 business days.
- USA-EU: 10–21 business days
- Worldwide: 14–30 business days
Shipping cost is shown at checkout.
Can I exchange or return an item?
Yes, you can exchange or return an item within 14 days of purchase. This right is guaranteed to you by the Law on the Protection of Consumer Rights
To use this feature, please make sure that:
- the product was not in use and has no traces of use: scratches, chips, abrasions, etc.
- the goods are fully completed and the integrity of the packaging is not violated
- retained all labels and factory markings