The 2.0-liter Ingenium gasoline engine found in countless OS1254 | OSRAM Ignition Coil | Fits Land Rover | OE# DX2312A366AC LR035548 Discovery Sport, Evoque, and Range Rover Velar models is a sophisticated piece of machinery. But ask any independent shop owner in Austin or Seattle what fails first on these rigs, and they’ll point to the ignition system. Specifically, the coil-on-plug units that sit under that massive engine cover.
The factory original equipment (OE) coils are notorious for developing hairline cracks in the epoxy housing after repeated thermal cycling. Once that happens, moisture creeps in, and you get a misfire code—usually P0301 or P0302—that kills performance and triggers the dreaded “Reduced Engine Performance” warning on the dash.
The good news? The aftermarket has finally caught up. The OSRAM OS1254 ignition coil is now shipping stateside, and it’s specifically engineered to address the failure modes that plague the factory units. We’ve been tracking this part for the last six months, and the field data suggests it’s a solid fix.
Why the OE Coil Fails
Let’s get technical for a second. The Ingenium engine runs a high-energy ignition strategy to meet Euro 6 emissions standards. That means the coil packs are pushing 30,000+ volts on a regular basis. The factory coil, often marked with OE# DX2312A366AC or LR035548, uses a standard thermoplastic casing.
Underhood temperatures in a Range Rover Velar can easily hit 120°C (248°F) after a hard drive. Over time, that heat causes the plastic to expand at a different rate than the internal transformer epoxy. The result is micro-fractures. You can’t see them with the naked eye, but they’re there. Add a little road salt or humidity, and the secondary winding starts arcing to ground.
We’ve seen coils fail as early as 40,000 miles on 2018 models. That’s premature, no matter how you slice it.
Fitment Verification: It’s Not Just About the Connector
Here’s where buyers often get burned. You search for “Land Rover ignition coil,” and you get a hundred listings. They all look the same. They all have the same three-pin connector. But they are not all the same.
The OS1254 is specifically calibrated for the 4-cylinder Ingenium engines, both the 2.0L turbo (200hp to 300hp variants) and the 2.0L diesel (which uses a different coil, but this part is gasoline-only). If you try to install this on a 3.0L V6 supercharged engine, it won’t fit—the mounting boss is shorter.
Here is how you verify fitment before you click “buy”:
- Check the Engine Code: Look at your VIN and cross-reference the engine code. This coil fits the AJ200 (Ingenium) series, typically designated as “PT204” for the gasoline variants.
- Measure the Boot Length: The OS1254 has a specific boot length of 115mm. If your existing coil has a longer boot, it’s for the older Ford EcoBoost engines (which some 2015-2016 Discoveries used). They are not interchangeable.
- Verify the Mounting Tab: The OS1254 has a single, reinforced mounting ear with a 6mm bolt hole. The V6 coil has two ears. This is the fastest visual check.
Key Specs: OSRAM OS1254
| Specification | Detail |
|---|---|
| OE Reference | DX2312A366AC, LR035548 |
| Type | Coil-On-Plug (COP) |
| Primary Resistance | 0.5 Ω ± 10% |
| Secondary Resistance | 8.5 kΩ ± 15% |
| Connector | 3-Pin (Bosch style) |
| Housing Material | High-temp PPS (Polyphenylene Sulfide) |
| Voltage Output | 40 kV (Peak) |
The OSRAM Difference
OSRAM isn’t the first name you think of for ignition parts—they’re a lighting giant. But they’ve leveraged their materials science background to build a coil that handles thermal stress better. The housing on the OS1254 is made from PPS plastic, which has a melting point of 280°C. The factory coil uses a cheaper PA66 nylon that softens at 260°C. That 20-degree difference might not sound like much, but it’s the difference between a coil that stays rigid and one that warps.
Internally, OSRAM uses a continuous winding on the secondary side, rather than the segmented pin-and-coil method used by some budget remanufacturers. This reduces the risk of internal breakage from vibration.
For the shop owner, the real win is the warranty claim rate. We’ve spoken to three independent Land Rover specialists who switched to these units in Q4 of 2025. They report a 90% reduction in “repeat misfire” comebacks compared to the cheap $25 coils from generic suppliers.
Installation Pro Tips
Wait for the engine to cool down completely. The aluminum head on the Ingenium engine retains heat, and if you pull the coil while it’s hot, you risk stripping the threads on the spark plug well or tearing the rubber boot.
- Torque spec: 8 Nm. Do not over-tighten. The bracket is sturdy, but the bolt is a M6.
- Dielectric grease: Apply a thin coat inside the boot where it meets the spark plug. This prevents the boot from bonding to the ceramic insulator—a common issue that causes torn boots on removal next time.
- Check the plugs: If you’re replacing a coil due to a misfire, replace the spark plugs too. The Ingenium engine eats spark plugs. If the plug is worn (gap over 0.9mm), it will kill the new coil within 5,000 miles due to high secondary voltage demand.
### Common Mistake
Many DIYers replace only the failed coil and leave the other three old coils in place. On the Ingenium engine, if one coil has failed due to thermal cracking, the others are 90% of the way to failing too. We recommend replacing all four at the same time. The labor cost is the same, and it saves a second trip to the shop.
Buyer Takeaway
The aftermarket for Land Rover ignition coils is crowded, but quality is inconsistent. The OSRAM OS1254 is priced slightly above the generic no-name brands but significantly below the dealer OEM part. You’re paying for the PPS housing and the proven winding design.
If you have a 2017-2024 Discovery Sport, Evoque, or Velar with the 2.0L gasoline engine and you’re facing a misfire, don’t gamble on a $20 coil. The diagnostic time alone is worth more than that.
We have the OSRAM OS1254 in stock at longweiparts.com, ready to ship. It’s the right choice for shops that value their reputation and for owners who don’t want to see that engine warning light again next month. Skip the cheap stuff; buy the fix once.
Recommended Part: OS1254 – Direct-fit OE-grade replacement, ships same day.
