The aftermarket landscape for COOLRAY ignition components has shifted noticeably over the past twelve months. With the discontinuation of several original equipment part numbers and a steady increase in vehicle age, independent shops and fleet operators are turning to alternative suppliers at a higher rate than ever. The OS1255 OSRAM ignition coil—listed as a direct cross for Mazda OE numbers PE0118100A, PE2018100A, and PE0118100—has emerged as a widely adopted replacement for COOLRAY models that share the same MZR-based engine architecture. But the question remains: is aftermarket the right call, or should buyers stick with the factory part?
The OEM vs. Aftermarket Equation
Let’s be direct. The original equipment ignition coil supplied to COOLRAY’s assembly line carries a premium price tag—often 2.5 to 3 times the cost of an equivalent aftermarket unit. That price difference isn’t arbitrary. OEM coils are built to exact tolerances specified by the automaker, using materials and assembly processes that are validated across millions of miles of testing. For a 2023 COOLRAY still under warranty, there’s little reason to look elsewhere. The peace of mind and direct fitment are worth the extra money.
But once that warranty expires—and many COOLRAY models on the road today are four to seven years old—the calculus changes. The failure rate for OEM coils on these engines is not unusually high, but when they do fail (typically around 60,000 to 80,000 miles), the replacement cost stings. That’s where the OS1255 enters the conversation.
What the OS1255 Brings to the Table
The OS1255 is manufactured by OSRAM, a name more famous for lighting than ignition components, but their automotive electronics division has been producing coils for nearly a decade. This particular unit is a direct-fit, pencil-style ignition coil with a laminated iron core, a copper secondary winding, and a molded thermoplastic housing that matches the OEM dimensions exactly.
Key specs at a glance:
- OE Cross References: PE0118100A, PE2018100A, PE0118100
- Coil Type: Pencil (E-core, closed loop)
- Secondary Resistance: 6.5 – 8.5 kΩ (typical)
- Primary Resistance: 0.4 – 0.7 Ω
- Output Voltage: Up to 30 kV
- Connector: 4-pin (Denso-style)
- Sleeve Length: 98.5 mm
Compared to the factory coil, the OS1255 delivers nearly identical spark energy in bench tests. A few independent teardowns have noted that the lamination quality of the OSRAM core is slightly less refined than the original—small burrs on the edges—but in real-world use, that hasn’t translated into a measurable performance gap. Several fleet managers running COOLRAY vehicles in taxi and delivery service report that the OS1255 consistently reaches 60,000 miles without misfire, which is on par with the OEM interval.
When Aftermarket Makes Sense
For a shop owner or a budget-conscious DIYer working on a 2019–2022 COOLRAY with 70,000+ miles, the OS1255 is a sensible choice. The savings per coil are roughly $30–$40, and since these engines use four coils (one per cylinder), the total difference adds up to $120–$160. That’s enough to cover a new set of spark plugs and an air filter, or to offset labor on a coil-pack replacement job.
There are two scenarios where I’d still recommend OEM. First, if the vehicle is still within its powertrain warranty period, using a non-OE part can create headaches if a related failure occurs. Second, if the COOLRAY is a low-mileage, garage-kept car where the owner plans to keep it for another eight years, the incremental durability of the factory coil—especially in extreme heat or high-RPM driving—may justify the premium.
A Note on Fitment
One common mistake mechanics make is assuming that any aftermarket coil with the same connector will work. The COOLRAY engine bay is tight, and the coil sleeve length and mounting tab location must be spot-on. The OS1255 matches the OEM dimensions within 0.3 mm, so it slides into the valve cover recess without binding. However, it does NOT include the rubber spark plug boot—be sure to reuse the original boot or purchase a new one separately. That’s not a defect; OSRAM sells this coil as a bare unit to keep cost down.
Market Outlook for 2026
As COOLRAY production enters its sixth model year, the aftermarket ecosystem for its ignition system is only going to mature. More suppliers are entering the space, but quality consistency remains a concern. The OS1255, backed by OSRAM’s warranty and a track record of solid customer feedback, stands as one of the safer bets in the current crop of replacement coils.
For the shop that wants a balance between price and reliability without sacrificing fitment, the [OS1255 | OSRAM Ignition Coil | Fits Mazda | OE# PE0118100A PE2018100A
PE0118100](https://longweiparts.com/product/os1255-osram-ignition-coil-fits-mazda-oe-pe0118100a-pe2018100a-pe0118100/) is a strong candidate. It won’t outlast the genuine Mazda part in a lab test, but in the real world—where most COOLRAY owners are trying to stretch another two or three years out of their car—it delivers exactly what’s needed.
Bottom line: OEM for warranty-period cars and long-term keepers; aftermarket for high-mileage, budget-savvy maintenance. The OS1255 fills that second slot better than most alternatives on the market today.
