BMW & Mercedes-Benz
Fuel System
Pumps, injectors, high-pressure fuel pumps, filters, and rails.
Compared to current list price at local franchise dealership parts departments. Same-day or next-day delivery based on order time and stock. Delivery radius measured from our Fullerton warehouse.
Common parts
- Fuel pumps
- High-pressure fuel pumps
- Injectors
- Fuel filters
- Fuel rails
- Pressure sensors
Counter diagnostics
Symptom → likely part
What we hear on the phone, and what it usually turns out to be. Read the data before you buy the part.
| What you’re seeing | Likely part | OEM or aftermarket |
|---|---|---|
| 01Long crank hot, starts fine cold | High-pressure fuel pump | OEM only |
| 02Fuel trims high at idle, clean at load | Injector leaking down | OEM injector, coded |
| 03Rough cold start, smell of fuel | Injector or low-side pressure | OEM |
| 04Limp mode over 3,000 rpm | Low fuel pressure, in-tank pump | OEM |
| 05P0087 stored, no drivability change yet | HPFP on the way out | OEM |
| 06Diesel hard start after sitting | Fuel filter past interval | OEM filter |
| 07Misfire that moves cylinder to cylinder | Injector index not coded | Coding, not a part |
Fitment at a glance
BMW chassis
- N54 / N55 HPFP
- N20 / N26
- B48 / B58
- F30 / F10
- X3 / X5
Mercedes-Benz chassis & engines
- M274 / M276 direct injection
- OM642 / OM651 diesel
- W205
- W212 / W213
Not a complete list. Send the VIN and we confirm the fitment before you buy.
What drives the price
Genuine, OEM supplier, aftermarket
Fuel is an OEM category. Injectors carry a flow index that gets coded to the DME, and a pump has to hold 200-plus bar on a hot restart. Genuine or the exact supplier part, nothing else.
Bosch and Continental build most of what is inside both marque boxes. The Bosch-labeled injector or pump is the same hardware at a real discount, and it carries the same index marking.
Quality aftermarket is safe on filters and low-side lines. It is not safe on injectors — remanufactured bargain injectors come back, and the second set is on your labor.
Three prices, one part
Dealer list
100%
The number on the franchise counter’s screen. Your baseline.
Our OEM price
−15%
Priced at least 15% under dealer list on the same genuine or OEM-supplier box, delivered.
Quality aftermarket
Lower
Named brands only, where aftermarket is the right call for this job.
Compared to current list price at local franchise dealership parts departments.
Same-day or next-day delivery based on order time and stock. Delivery radius measured from our Fullerton warehouse.
What usually sends these in
Long crank, a fuel-trim code, a rough cold start, the HPFP that BMW owners know by name.
BMW: N54/N55 HPFP and injectors.
Mercedes-Benz: Direct-injection pumps and injectors.
Serving
Free delivery on orders $200+ within 10 miles of Fullerton.
Questions
Fuel System, answered
- Both. We quote genuine, OEM-supplier, and quality aftermarket side by side, then you pick the one that fits the job and the budget.